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/GateController.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:07:32,945 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:07:32,947 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:07:32,960 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 15:07:32,960 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 15:07:32,961 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 15:07:32,962 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 15:07:32,964 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 15:07:32,966 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 15:07:32,967 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 15:07:32,968 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 15:07:32,998 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 15:07:33,025 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:07:33,025 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:07:33,026 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:07:33,026 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:07:33,027 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:07:33,027 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:07:33,027 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:07:33,027 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:07:33,028 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:07:33,028 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:07:33,028 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:07:33,028 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:07:33,028 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:07:33,029 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:07:33,029 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:07:33,030 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:07:33,030 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:07:33,031 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:07:33,031 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:07:33,031 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:07:33,031 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:07:33,031 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:07:33,033 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:07:33,033 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:07:33,034 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:07:33,034 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:07:33,034 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:07:33,034 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:07:33,034 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:07:33,036 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:07:33,036 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:07:33,036 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:07:33,036 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:07:33,037 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:07:33,037 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:07:33,037 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:07:33,037 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:07:33,037 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:07:33,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:07:33,038 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:07:33,039 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:07:33,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:07:33,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:07:33,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:07:33,098 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:07:33,098 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:07:33,099 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl [2018-12-03 15:07:33,099 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl' [2018-12-03 15:07:33,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:07:33,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:07:33,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:07:33,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:07:33,146 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:07:33,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,186 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 15:07:33,186 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 15:07:33,187 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 15:07:33,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:07:33,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:07:33,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:07:33,190 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:07:33,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/1) ... [2018-12-03 15:07:33,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:07:33,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:07:33,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:07:33,219 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:07:33,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GateController.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 15:07:33,299 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-12-03 15:07:33,299 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-12-03 15:07:33,300 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-12-03 15:07:33,582 INFO L272 CfgBuilder]: Using library mode [2018-12-03 15:07:33,583 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 15:07:33,583 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:07:33 BoogieIcfgContainer [2018-12-03 15:07:33,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:07:33,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:07:33,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:07:33,588 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:07:33,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:07:33" (1/2) ... [2018-12-03 15:07:33,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45912a1a and model type GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:07:33, skipping insertion in model container [2018-12-03 15:07:33,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:07:33" (2/2) ... [2018-12-03 15:07:33,592 INFO L112 eAbstractionObserver]: Analyzing ICFG GateController.bpl [2018-12-03 15:07:33,602 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:07:33,610 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:07:33,628 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:07:33,663 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:07:33,663 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:07:33,663 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:07:33,664 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:07:33,664 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:07:33,664 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:07:33,664 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:07:33,664 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:07:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-12-03 15:07:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 15:07:33,688 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:33,689 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 15:07:33,692 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:33,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:33,699 INFO L82 PathProgramCache]: Analyzing trace with hash 30432, now seen corresponding path program 1 times [2018-12-03 15:07:33,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:33,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:33,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:33,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:33,754 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:33,847 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 15:07:33,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:07:33,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:07:33,849 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:07:33,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:07:33,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:07:33,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:07:33,868 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-12-03 15:07:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:33,942 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-12-03 15:07:33,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:07:33,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 15:07:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:33,954 INFO L225 Difference]: With dead ends: 19 [2018-12-03 15:07:33,955 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 15:07:33,959 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 15:07:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 15:07:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-12-03 15:07:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 15:07:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-12-03 15:07:33,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 3 [2018-12-03 15:07:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:33,990 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-12-03 15:07:33,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:07:33,990 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-12-03 15:07:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 15:07:33,991 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:33,991 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 15:07:33,991 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:33,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:33,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1953617644, now seen corresponding path program 1 times [2018-12-03 15:07:33,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:33,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:33,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:33,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:33,993 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:34,199 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 15:07:34,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:34,200 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:34,201 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-03 15:07:34,204 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [11], [16], [18], [20], [21] [2018-12-03 15:07:34,244 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:07:34,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:07:34,445 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 15:07:34,446 INFO L272 AbstractInterpreter]: Visited 8 different actions 21 times. Merged at 7 different actions 12 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 15:07:34,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:34,461 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 15:07:34,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:34,462 INFO 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 15:07:34,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:34,478 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:34,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:34,734 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 15:07:34,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:34,883 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 15:07:34,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:34,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-03 15:07:34,914 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:34,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 15:07:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 15:07:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-03 15:07:34,916 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 8 states. [2018-12-03 15:07:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:35,114 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-03 15:07:35,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 15:07:35,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-12-03 15:07:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:35,116 INFO L225 Difference]: With dead ends: 21 [2018-12-03 15:07:35,117 INFO L226 Difference]: Without dead ends: 19 [2018-12-03 15:07:35,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-03 15:07:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-03 15:07:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-12-03 15:07:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 15:07:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-12-03 15:07:35,128 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-12-03 15:07:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:35,129 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-12-03 15:07:35,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 15:07:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-12-03 15:07:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 15:07:35,131 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:35,131 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 15:07:35,132 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:35,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1953558062, now seen corresponding path program 1 times [2018-12-03 15:07:35,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:35,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:35,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:35,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:35,135 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:35,180 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 15:07:35,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:07:35,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:07:35,181 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:07:35,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:07:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:07:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:07:35,182 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2018-12-03 15:07:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:35,193 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-03 15:07:35,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:07:35,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-03 15:07:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:35,195 INFO L225 Difference]: With dead ends: 21 [2018-12-03 15:07:35,195 INFO L226 Difference]: Without dead ends: 14 [2018-12-03 15:07:35,196 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 15:07:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-03 15:07:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-03 15:07:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 15:07:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-12-03 15:07:35,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2018-12-03 15:07:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:35,201 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-12-03 15:07:35,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:07:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-12-03 15:07:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 15:07:35,202 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:35,202 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-12-03 15:07:35,202 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:35,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:35,203 INFO L82 PathProgramCache]: Analyzing trace with hash 72785504, now seen corresponding path program 2 times [2018-12-03 15:07:35,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:35,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:35,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:35,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:35,205 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:35,383 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 15:07:35,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:35,384 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:35,384 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:35,384 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:35,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:35,385 INFO 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 15:07:35,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:35,395 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:35,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 15:07:35,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:35,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:35,805 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 15:07:35,806 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:35,919 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 15:07:35,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:35,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2018-12-03 15:07:35,940 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:35,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 15:07:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 15:07:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-03 15:07:35,942 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2018-12-03 15:07:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:36,032 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-12-03 15:07:36,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 15:07:36,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-12-03 15:07:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:36,037 INFO L225 Difference]: With dead ends: 25 [2018-12-03 15:07:36,037 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 15:07:36,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-03 15:07:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 15:07:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-12-03 15:07:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 15:07:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-12-03 15:07:36,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2018-12-03 15:07:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:36,044 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-12-03 15:07:36,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 15:07:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2018-12-03 15:07:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 15:07:36,045 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:36,046 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-12-03 15:07:36,046 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:36,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:36,046 INFO L82 PathProgramCache]: Analyzing trace with hash 491282284, now seen corresponding path program 3 times [2018-12-03 15:07:36,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:36,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:36,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:36,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:36,048 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:36,391 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 15:07:36,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:36,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:36,392 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:36,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:36,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:36,392 INFO 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 15:07:36,408 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:36,409 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:36,448 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:36,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:36,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:36,852 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 15:07:36,852 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:37,042 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 15:07:37,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:37,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-03 15:07:37,063 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:37,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 15:07:37,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 15:07:37,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2018-12-03 15:07:37,065 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2018-12-03 15:07:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:37,178 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-12-03 15:07:37,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 15:07:37,180 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-12-03 15:07:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:37,181 INFO L225 Difference]: With dead ends: 30 [2018-12-03 15:07:37,181 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 15:07:37,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2018-12-03 15:07:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 15:07:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-12-03 15:07:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 15:07:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-03 15:07:37,187 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2018-12-03 15:07:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:37,188 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-03 15:07:37,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 15:07:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-03 15:07:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 15:07:37,189 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:37,189 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-12-03 15:07:37,189 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:37,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1589732832, now seen corresponding path program 4 times [2018-12-03 15:07:37,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:37,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:37,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:37,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:37,192 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:37,357 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 15:07:37,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:37,358 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:37,358 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:37,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:37,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:37,359 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 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 15:07:37,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:37,374 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:37,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:37,810 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 15:07:37,810 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:37,992 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 15:07:38,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:38,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2018-12-03 15:07:38,013 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:38,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 15:07:38,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 15:07:38,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2018-12-03 15:07:38,015 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 20 states. [2018-12-03 15:07:38,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:38,412 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-03 15:07:38,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 15:07:38,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-12-03 15:07:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:38,418 INFO L225 Difference]: With dead ends: 35 [2018-12-03 15:07:38,418 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 15:07:38,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2018-12-03 15:07:38,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 15:07:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-12-03 15:07:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 15:07:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2018-12-03 15:07:38,425 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 23 [2018-12-03 15:07:38,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:38,425 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2018-12-03 15:07:38,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 15:07:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2018-12-03 15:07:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 15:07:38,427 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:38,427 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-12-03 15:07:38,427 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:38,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:38,427 INFO L82 PathProgramCache]: Analyzing trace with hash 602818540, now seen corresponding path program 5 times [2018-12-03 15:07:38,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:38,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:38,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:38,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:38,429 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:38,589 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 15:07:38,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:38,590 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:38,590 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:38,590 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:38,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:38,590 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:38,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:38,600 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:38,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-03 15:07:38,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:38,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:39,293 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-03 15:07:39,604 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 15:07:39,605 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:40,011 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 15:07:40,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:40,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-03 15:07:40,034 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:40,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 15:07:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 15:07:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 15:07:40,036 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 24 states. [2018-12-03 15:07:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:40,164 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-12-03 15:07:40,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 15:07:40,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2018-12-03 15:07:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:40,166 INFO L225 Difference]: With dead ends: 40 [2018-12-03 15:07:40,166 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 15:07:40,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 15:07:40,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 15:07:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-03 15:07:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 15:07:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-12-03 15:07:40,173 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2018-12-03 15:07:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:40,174 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-12-03 15:07:40,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 15:07:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-12-03 15:07:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 15:07:40,175 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:40,175 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-12-03 15:07:40,175 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:40,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1979239776, now seen corresponding path program 6 times [2018-12-03 15:07:40,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:40,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:40,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:40,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:40,177 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:40,496 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 15:07:40,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:40,497 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:40,497 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:40,498 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:40,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:40,498 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:40,514 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:40,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:40,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:40,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:40,994 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 15:07:40,995 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:41,396 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 15:07:41,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:41,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2018-12-03 15:07:41,418 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:41,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 15:07:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 15:07:41,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 15:07:41,421 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 28 states. [2018-12-03 15:07:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:41,541 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-12-03 15:07:41,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 15:07:41,544 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2018-12-03 15:07:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:41,545 INFO L225 Difference]: With dead ends: 45 [2018-12-03 15:07:41,545 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 15:07:41,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2018-12-03 15:07:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 15:07:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-12-03 15:07:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 15:07:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-12-03 15:07:41,552 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 33 [2018-12-03 15:07:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:41,553 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-12-03 15:07:41,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 15:07:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-12-03 15:07:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 15:07:41,554 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:41,554 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-12-03 15:07:41,555 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:41,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:41,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1800695700, now seen corresponding path program 7 times [2018-12-03 15:07:41,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:41,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:41,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:41,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:41,556 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:41,737 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 15:07:41,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:41,737 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:41,738 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:41,738 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:41,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:41,738 INFO 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 15:07:41,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:41,747 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:41,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:42,157 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 15:07:42,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:42,455 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 15:07:42,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:42,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2018-12-03 15:07:42,474 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:42,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 15:07:42,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 15:07:42,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=1508, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 15:07:42,477 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 32 states. [2018-12-03 15:07:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:42,623 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2018-12-03 15:07:42,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 15:07:42,623 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2018-12-03 15:07:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:42,625 INFO L225 Difference]: With dead ends: 50 [2018-12-03 15:07:42,625 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 15:07:42,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=654, Invalid=1508, Unknown=0, NotChecked=0, Total=2162 [2018-12-03 15:07:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 15:07:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-12-03 15:07:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 15:07:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-12-03 15:07:42,633 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2018-12-03 15:07:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:42,634 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-12-03 15:07:42,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 15:07:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-12-03 15:07:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 15:07:42,635 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:42,636 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-12-03 15:07:42,636 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:42,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1430989600, now seen corresponding path program 8 times [2018-12-03 15:07:42,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:42,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:42,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:42,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:42,638 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:42,913 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 15:07:42,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:42,914 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:42,914 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:42,914 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:42,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:42,915 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:42,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:42,927 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:42,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 15:07:42,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:42,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:43,456 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 15:07:43,457 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:45,042 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 15:07:45,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:45,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2018-12-03 15:07:45,062 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:45,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 15:07:45,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 15:07:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 15:07:45,067 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 36 states. [2018-12-03 15:07:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:45,411 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-12-03 15:07:45,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 15:07:45,412 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2018-12-03 15:07:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:45,413 INFO L225 Difference]: With dead ends: 55 [2018-12-03 15:07:45,413 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 15:07:45,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2018-12-03 15:07:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 15:07:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-12-03 15:07:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 15:07:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-12-03 15:07:45,421 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 43 [2018-12-03 15:07:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:45,421 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-12-03 15:07:45,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 15:07:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-12-03 15:07:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 15:07:45,423 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:45,423 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-12-03 15:07:45,423 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:45,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:45,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1043842836, now seen corresponding path program 9 times [2018-12-03 15:07:45,424 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:45,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:45,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:45,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:45,425 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:45,741 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 15:07:45,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:45,741 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:45,741 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:45,742 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:45,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:45,742 INFO 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 15:07:45,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:45,757 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:45,798 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:45,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:45,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:46,308 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 15:07:46,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:47,210 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 15:07:47,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:47,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2018-12-03 15:07:47,231 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:47,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 15:07:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 15:07:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1018, Invalid=2404, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 15:07:47,233 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 40 states. [2018-12-03 15:07:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:47,371 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-12-03 15:07:47,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 15:07:47,371 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2018-12-03 15:07:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:47,373 INFO L225 Difference]: With dead ends: 60 [2018-12-03 15:07:47,373 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 15:07:47,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1018, Invalid=2404, Unknown=0, NotChecked=0, Total=3422 [2018-12-03 15:07:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 15:07:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-03 15:07:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 15:07:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2018-12-03 15:07:47,381 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 48 [2018-12-03 15:07:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:47,381 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2018-12-03 15:07:47,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 15:07:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2018-12-03 15:07:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 15:07:47,382 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:47,382 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-12-03 15:07:47,382 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:47,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:47,383 INFO L82 PathProgramCache]: Analyzing trace with hash -676496288, now seen corresponding path program 10 times [2018-12-03 15:07:47,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:47,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:47,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:47,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:47,384 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:47,848 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 15:07:47,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:47,849 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:47,849 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:47,849 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:47,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:47,849 INFO 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 15:07:47,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:47,863 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:47,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:48,831 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 15:07:48,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:49,286 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 15:07:49,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:49,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2018-12-03 15:07:49,305 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:49,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 15:07:49,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 15:07:49,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 15:07:49,307 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 44 states. [2018-12-03 15:07:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:49,524 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2018-12-03 15:07:49,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 15:07:49,525 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2018-12-03 15:07:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:49,528 INFO L225 Difference]: With dead ends: 65 [2018-12-03 15:07:49,528 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 15:07:49,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2018-12-03 15:07:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 15:07:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-12-03 15:07:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 15:07:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-03 15:07:49,535 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 53 [2018-12-03 15:07:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:49,536 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-03 15:07:49,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 15:07:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-03 15:07:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 15:07:49,537 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:49,537 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-12-03 15:07:49,537 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:49,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1014218388, now seen corresponding path program 11 times [2018-12-03 15:07:49,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:49,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:49,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:49,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:49,539 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:50,258 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 15:07:50,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:50,258 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:50,258 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:50,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:50,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:50,259 INFO 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 15:07:50,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:50,270 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:50,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-03 15:07:50,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:50,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:50,981 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 15:07:50,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:51,696 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 15:07:51,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:51,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2018-12-03 15:07:51,717 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:51,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 15:07:51,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 15:07:51,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 15:07:51,722 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 48 states. [2018-12-03 15:07:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:51,912 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2018-12-03 15:07:51,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 15:07:51,913 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 58 [2018-12-03 15:07:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:51,914 INFO L225 Difference]: With dead ends: 70 [2018-12-03 15:07:51,914 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 15:07:51,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2018-12-03 15:07:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 15:07:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-12-03 15:07:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 15:07:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2018-12-03 15:07:51,924 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 58 [2018-12-03 15:07:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:51,924 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2018-12-03 15:07:51,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 15:07:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2018-12-03 15:07:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 15:07:51,925 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:51,926 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-12-03 15:07:51,926 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:51,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:51,928 INFO L82 PathProgramCache]: Analyzing trace with hash -778386464, now seen corresponding path program 12 times [2018-12-03 15:07:51,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:51,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:51,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:51,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:51,930 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:52,398 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 15:07:52,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:52,398 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:52,398 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:52,399 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:52,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:52,399 INFO 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 15:07:52,408 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:07:52,408 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:07:52,425 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:07:52,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:52,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:53,215 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 15:07:53,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:53,791 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 15:07:53,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:53,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2018-12-03 15:07:53,810 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:53,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 15:07:53,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 15:07:53,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1714, Invalid=4138, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 15:07:53,814 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 52 states. [2018-12-03 15:07:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:54,123 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2018-12-03 15:07:54,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 15:07:54,124 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2018-12-03 15:07:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:54,124 INFO L225 Difference]: With dead ends: 75 [2018-12-03 15:07:54,125 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 15:07:54,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1714, Invalid=4138, Unknown=0, NotChecked=0, Total=5852 [2018-12-03 15:07:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 15:07:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-12-03 15:07:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 15:07:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2018-12-03 15:07:54,134 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 63 [2018-12-03 15:07:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:54,134 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2018-12-03 15:07:54,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 15:07:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2018-12-03 15:07:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 15:07:54,135 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:54,136 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-12-03 15:07:54,136 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:54,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash -130045460, now seen corresponding path program 13 times [2018-12-03 15:07:54,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:54,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:54,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:54,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:54,137 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:54,532 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 15:07:54,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:54,533 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:54,533 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:54,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:54,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:54,533 INFO 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 15:07:54,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:54,542 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:07:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:54,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:55,486 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 15:07:55,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:56,192 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 15:07:56,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:56,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2018-12-03 15:07:56,211 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:56,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 15:07:56,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 15:07:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1986, Invalid=4820, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 15:07:56,214 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 56 states. [2018-12-03 15:07:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:56,434 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2018-12-03 15:07:56,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 15:07:56,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-12-03 15:07:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:56,436 INFO L225 Difference]: With dead ends: 80 [2018-12-03 15:07:56,436 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 15:07:56,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3718 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1986, Invalid=4820, Unknown=0, NotChecked=0, Total=6806 [2018-12-03 15:07:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 15:07:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-12-03 15:07:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 15:07:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2018-12-03 15:07:56,443 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 68 [2018-12-03 15:07:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:56,443 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2018-12-03 15:07:56,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 15:07:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2018-12-03 15:07:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 15:07:56,445 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:56,445 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-12-03 15:07:56,445 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:56,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash -415978656, now seen corresponding path program 14 times [2018-12-03 15:07:56,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:56,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:56,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:07:56,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:56,447 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:07:57,626 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 15:07:57,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:57,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:07:57,626 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:07:57,627 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:07:57,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:07:57,627 INFO 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 15:07:57,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:07:57,636 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:07:57,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-03 15:07:57,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:07:57,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:07:58,463 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 15:07:58,464 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:07:59,514 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 15:07:59,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:07:59,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 88 [2018-12-03 15:07:59,533 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:07:59,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 15:07:59,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 15:07:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 15:07:59,535 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 60 states. [2018-12-03 15:07:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:07:59,777 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-12-03 15:07:59,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 15:07:59,780 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-12-03 15:07:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:07:59,781 INFO L225 Difference]: With dead ends: 85 [2018-12-03 15:07:59,781 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 15:07:59,782 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2018-12-03 15:07:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 15:07:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-12-03 15:07:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 15:07:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-12-03 15:07:59,789 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 73 [2018-12-03 15:07:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:07:59,790 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-12-03 15:07:59,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 15:07:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-12-03 15:07:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 15:07:59,791 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:07:59,791 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-12-03 15:07:59,791 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:07:59,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:07:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2077592980, now seen corresponding path program 15 times [2018-12-03 15:07:59,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:07:59,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:59,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:07:59,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:07:59,792 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:07:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:00,749 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 15:08:00,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:00,749 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:00,750 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:00,750 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:00,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:00,750 INFO 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 15:08:00,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:00,758 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:00,780 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:00,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:00,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:01,600 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 15:08:01,600 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:02,496 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 15:08:02,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:02,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2018-12-03 15:08:02,515 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:02,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 15:08:02,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 15:08:02,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2590, Invalid=6340, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 15:08:02,517 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 64 states. [2018-12-03 15:08:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:02,931 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2018-12-03 15:08:02,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 15:08:02,938 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 78 [2018-12-03 15:08:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:02,939 INFO L225 Difference]: With dead ends: 90 [2018-12-03 15:08:02,939 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 15:08:02,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2590, Invalid=6340, Unknown=0, NotChecked=0, Total=8930 [2018-12-03 15:08:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 15:08:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-12-03 15:08:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 15:08:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-12-03 15:08:02,946 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 78 [2018-12-03 15:08:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:02,946 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-12-03 15:08:02,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 15:08:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-12-03 15:08:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 15:08:02,947 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:02,948 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-12-03 15:08:02,948 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:02,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1630745312, now seen corresponding path program 16 times [2018-12-03 15:08:02,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:02,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:02,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:02,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:02,955 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:03,536 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 15:08:03,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:03,537 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:03,537 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:03,537 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:03,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:03,537 INFO 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 15:08:03,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:03,546 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:03,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:04,542 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 15:08:04,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:05,879 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 15:08:05,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:05,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 100 [2018-12-03 15:08:05,898 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:05,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 15:08:05,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 15:08:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2922, Invalid=7178, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 15:08:05,900 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 68 states. [2018-12-03 15:08:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:06,324 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2018-12-03 15:08:06,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 15:08:06,325 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 83 [2018-12-03 15:08:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:06,326 INFO L225 Difference]: With dead ends: 95 [2018-12-03 15:08:06,326 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 15:08:06,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2922, Invalid=7178, Unknown=0, NotChecked=0, Total=10100 [2018-12-03 15:08:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 15:08:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 15:08:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 15:08:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-12-03 15:08:06,333 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 83 [2018-12-03 15:08:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:06,334 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-12-03 15:08:06,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 15:08:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-12-03 15:08:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 15:08:06,335 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:06,335 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-12-03 15:08:06,335 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:06,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash -778790164, now seen corresponding path program 17 times [2018-12-03 15:08:06,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:06,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:06,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:06,337 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:06,934 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 15:08:06,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:06,934 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:06,934 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:06,935 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:06,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:06,935 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:06,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:06,944 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:06,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-03 15:08:06,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:06,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:08,169 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 15:08:08,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:09,229 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 15:08:09,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:09,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 106 [2018-12-03 15:08:09,248 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:09,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 15:08:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 15:08:09,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3274, Invalid=8068, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 15:08:09,251 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 72 states. [2018-12-03 15:08:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:09,540 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2018-12-03 15:08:09,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 15:08:09,541 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 88 [2018-12-03 15:08:09,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:09,542 INFO L225 Difference]: With dead ends: 100 [2018-12-03 15:08:09,542 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 15:08:09,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3274, Invalid=8068, Unknown=0, NotChecked=0, Total=11342 [2018-12-03 15:08:09,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 15:08:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-12-03 15:08:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 15:08:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2018-12-03 15:08:09,547 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 88 [2018-12-03 15:08:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:09,547 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2018-12-03 15:08:09,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 15:08:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2018-12-03 15:08:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 15:08:09,548 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:09,549 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-12-03 15:08:09,549 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:09,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash 38689376, now seen corresponding path program 18 times [2018-12-03 15:08:09,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:09,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:09,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:09,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:09,551 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:10,546 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 15:08:10,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:10,546 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:10,546 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:10,547 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:10,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:10,547 INFO 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 15:08:10,557 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:10,557 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:10,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:10,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:10,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:11,646 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 15:08:11,646 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:12,882 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 15:08:12,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:12,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2018-12-03 15:08:12,901 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:12,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 15:08:12,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 15:08:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3646, Invalid=9010, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 15:08:12,903 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 76 states. [2018-12-03 15:08:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:13,215 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2018-12-03 15:08:13,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 15:08:13,215 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 93 [2018-12-03 15:08:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:13,216 INFO L225 Difference]: With dead ends: 105 [2018-12-03 15:08:13,216 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 15:08:13,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7083 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3646, Invalid=9010, Unknown=0, NotChecked=0, Total=12656 [2018-12-03 15:08:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 15:08:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-03 15:08:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 15:08:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-12-03 15:08:13,222 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 93 [2018-12-03 15:08:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:13,222 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-12-03 15:08:13,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 15:08:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2018-12-03 15:08:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 15:08:13,223 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:13,223 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-12-03 15:08:13,223 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:13,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash 281420652, now seen corresponding path program 19 times [2018-12-03 15:08:13,223 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:13,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:13,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:13,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:13,224 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:14,071 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 15:08:14,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:14,071 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:14,072 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:14,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:14,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:14,072 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 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 15:08:14,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:14,081 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:14,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:15,190 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 15:08:15,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:16,921 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 15:08:16,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:16,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2018-12-03 15:08:16,940 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:16,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 15:08:16,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 15:08:16,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4038, Invalid=10004, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 15:08:16,942 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 80 states. [2018-12-03 15:08:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:17,244 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2018-12-03 15:08:17,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 15:08:17,245 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2018-12-03 15:08:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:17,245 INFO L225 Difference]: With dead ends: 110 [2018-12-03 15:08:17,246 INFO L226 Difference]: Without dead ends: 108 [2018-12-03 15:08:17,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7885 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4038, Invalid=10004, Unknown=0, NotChecked=0, Total=14042 [2018-12-03 15:08:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-03 15:08:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-12-03 15:08:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 15:08:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2018-12-03 15:08:17,252 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 98 [2018-12-03 15:08:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:17,252 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2018-12-03 15:08:17,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 15:08:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2018-12-03 15:08:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 15:08:17,253 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:17,253 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-12-03 15:08:17,254 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:17,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2025971232, now seen corresponding path program 20 times [2018-12-03 15:08:17,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:17,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:17,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:17,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:17,255 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:17,948 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 15:08:17,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:17,949 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:17,949 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:17,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:17,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:17,949 INFO 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 15:08:17,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:17,959 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:17,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-03 15:08:17,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:17,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:21,186 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 15:08:21,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:22,664 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 15:08:22,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:22,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 124 [2018-12-03 15:08:22,683 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:22,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 15:08:22,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 15:08:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4450, Invalid=11050, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 15:08:22,685 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 84 states. [2018-12-03 15:08:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:23,030 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2018-12-03 15:08:23,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 15:08:23,032 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 103 [2018-12-03 15:08:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:23,033 INFO L225 Difference]: With dead ends: 115 [2018-12-03 15:08:23,033 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 15:08:23,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8730 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4450, Invalid=11050, Unknown=0, NotChecked=0, Total=15500 [2018-12-03 15:08:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 15:08:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-12-03 15:08:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 15:08:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2018-12-03 15:08:23,039 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 103 [2018-12-03 15:08:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:23,039 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2018-12-03 15:08:23,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 15:08:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2018-12-03 15:08:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-03 15:08:23,040 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:23,040 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-12-03 15:08:23,040 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:23,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1207497748, now seen corresponding path program 21 times [2018-12-03 15:08:23,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:23,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:23,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:23,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:23,041 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:24,058 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 15:08:24,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:24,058 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:24,058 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:24,058 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:24,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:24,058 INFO 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 15:08:24,067 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:24,067 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:24,093 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:24,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:24,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:25,427 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 15:08:25,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:27,338 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 15:08:27,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:27,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2018-12-03 15:08:27,357 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:27,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 15:08:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 15:08:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4882, Invalid=12148, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 15:08:27,360 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 88 states. [2018-12-03 15:08:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:27,734 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2018-12-03 15:08:27,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 15:08:27,734 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 108 [2018-12-03 15:08:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:27,735 INFO L225 Difference]: With dead ends: 120 [2018-12-03 15:08:27,735 INFO L226 Difference]: Without dead ends: 118 [2018-12-03 15:08:27,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9618 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4882, Invalid=12148, Unknown=0, NotChecked=0, Total=17030 [2018-12-03 15:08:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-03 15:08:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-12-03 15:08:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-12-03 15:08:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2018-12-03 15:08:27,742 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 108 [2018-12-03 15:08:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:27,742 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2018-12-03 15:08:27,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 15:08:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2018-12-03 15:08:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-03 15:08:27,743 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:27,743 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-12-03 15:08:27,744 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:27,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash 649759072, now seen corresponding path program 22 times [2018-12-03 15:08:27,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:27,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:27,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:27,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:27,745 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:28,814 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 15:08:28,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:28,815 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:28,815 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:28,815 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:28,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:28,815 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:28,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:28,824 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:28,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:30,396 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 15:08:30,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:32,362 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 15:08:32,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:32,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 136 [2018-12-03 15:08:32,380 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:32,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 15:08:32,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 15:08:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5334, Invalid=13298, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 15:08:32,383 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 92 states. [2018-12-03 15:08:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:32,735 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2018-12-03 15:08:32,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 15:08:32,736 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 113 [2018-12-03 15:08:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:32,737 INFO L225 Difference]: With dead ends: 125 [2018-12-03 15:08:32,737 INFO L226 Difference]: Without dead ends: 123 [2018-12-03 15:08:32,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10549 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5334, Invalid=13298, Unknown=0, NotChecked=0, Total=18632 [2018-12-03 15:08:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-03 15:08:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-12-03 15:08:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-03 15:08:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2018-12-03 15:08:32,744 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 113 [2018-12-03 15:08:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:32,744 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2018-12-03 15:08:32,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 15:08:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2018-12-03 15:08:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-03 15:08:32,745 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:32,745 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-12-03 15:08:32,745 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:32,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash 60773484, now seen corresponding path program 23 times [2018-12-03 15:08:32,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:32,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:32,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:32,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:32,746 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:33,671 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 15:08:33,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:33,672 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:33,672 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:33,672 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:33,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:33,672 INFO 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 15:08:33,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:33,681 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:33,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-03 15:08:33,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:33,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:35,259 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 15:08:35,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:37,654 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 15:08:37,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:37,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2018-12-03 15:08:37,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:37,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 15:08:37,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 15:08:37,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5806, Invalid=14500, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 15:08:37,676 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 96 states. [2018-12-03 15:08:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:38,145 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2018-12-03 15:08:38,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 15:08:38,146 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 118 [2018-12-03 15:08:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:38,146 INFO L225 Difference]: With dead ends: 130 [2018-12-03 15:08:38,146 INFO L226 Difference]: Without dead ends: 128 [2018-12-03 15:08:38,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11523 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5806, Invalid=14500, Unknown=0, NotChecked=0, Total=20306 [2018-12-03 15:08:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-03 15:08:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-12-03 15:08:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-03 15:08:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2018-12-03 15:08:38,153 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 118 [2018-12-03 15:08:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:38,154 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2018-12-03 15:08:38,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 15:08:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2018-12-03 15:08:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-03 15:08:38,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:38,155 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-12-03 15:08:38,155 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:38,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash 293310688, now seen corresponding path program 24 times [2018-12-03 15:08:38,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:38,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:38,156 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:39,173 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 15:08:39,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:39,173 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:39,173 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:39,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:39,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:39,173 INFO 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 15:08:39,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:39,182 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:39,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:39,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:39,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:41,396 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 15:08:41,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:43,507 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 15:08:43,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:43,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 148 [2018-12-03 15:08:43,527 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:43,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 15:08:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 15:08:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6298, Invalid=15754, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 15:08:43,529 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 100 states. [2018-12-03 15:08:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:44,192 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2018-12-03 15:08:44,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 15:08:44,192 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 123 [2018-12-03 15:08:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:44,193 INFO L225 Difference]: With dead ends: 135 [2018-12-03 15:08:44,193 INFO L226 Difference]: Without dead ends: 133 [2018-12-03 15:08:44,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12540 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6298, Invalid=15754, Unknown=0, NotChecked=0, Total=22052 [2018-12-03 15:08:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-03 15:08:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-12-03 15:08:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-03 15:08:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2018-12-03 15:08:44,203 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 123 [2018-12-03 15:08:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:44,203 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2018-12-03 15:08:44,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 15:08:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2018-12-03 15:08:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-03 15:08:44,204 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:44,204 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-12-03 15:08:44,205 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:44,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:44,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1977023724, now seen corresponding path program 25 times [2018-12-03 15:08:44,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:44,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:44,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:44,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:44,206 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:45,262 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 15:08:45,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:45,263 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:45,263 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:45,263 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:45,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:45,263 INFO 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 15:08:45,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:45,272 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:45,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:47,298 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 15:08:47,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:49,584 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 15:08:49,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:49,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 154 [2018-12-03 15:08:49,603 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:49,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 15:08:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 15:08:49,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6810, Invalid=17060, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 15:08:49,606 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 104 states. [2018-12-03 15:08:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:50,025 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2018-12-03 15:08:50,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 15:08:50,026 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 128 [2018-12-03 15:08:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:50,027 INFO L225 Difference]: With dead ends: 140 [2018-12-03 15:08:50,027 INFO L226 Difference]: Without dead ends: 138 [2018-12-03 15:08:50,029 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13600 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6810, Invalid=17060, Unknown=0, NotChecked=0, Total=23870 [2018-12-03 15:08:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-03 15:08:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-12-03 15:08:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-03 15:08:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2018-12-03 15:08:50,035 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 128 [2018-12-03 15:08:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:50,035 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2018-12-03 15:08:50,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 15:08:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2018-12-03 15:08:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-03 15:08:50,037 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:50,037 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-12-03 15:08:50,037 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:50,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash -231131040, now seen corresponding path program 26 times [2018-12-03 15:08:50,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:50,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:50,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:50,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:50,039 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:51,477 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 15:08:51,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:51,477 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:51,477 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:51,478 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:51,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:51,478 INFO 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 15:08:51,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:51,487 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:51,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-03 15:08:51,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:51,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:54,049 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 15:08:54,049 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:57,006 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 15:08:57,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:57,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 160 [2018-12-03 15:08:57,025 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:57,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-12-03 15:08:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-12-03 15:08:57,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7342, Invalid=18418, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 15:08:57,028 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 108 states. [2018-12-03 15:08:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:57,924 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2018-12-03 15:08:57,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 15:08:57,925 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 133 [2018-12-03 15:08:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:57,925 INFO L225 Difference]: With dead ends: 145 [2018-12-03 15:08:57,926 INFO L226 Difference]: Without dead ends: 143 [2018-12-03 15:08:57,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14703 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7342, Invalid=18418, Unknown=0, NotChecked=0, Total=25760 [2018-12-03 15:08:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-03 15:08:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-12-03 15:08:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-03 15:08:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2018-12-03 15:08:57,933 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 133 [2018-12-03 15:08:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:57,933 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2018-12-03 15:08:57,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-12-03 15:08:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2018-12-03 15:08:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-03 15:08:57,934 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:57,934 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-12-03 15:08:57,934 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:57,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1458963820, now seen corresponding path program 27 times [2018-12-03 15:08:57,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:57,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:57,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:57,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:57,936 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:59,227 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 15:08:59,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:59,227 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:59,227 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:59,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:59,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:59,228 INFO 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 15:08:59,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:59,237 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:59,275 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:59,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:59,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:01,343 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 15:09:01,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:04,228 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 15:09:04,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:04,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2018-12-03 15:09:04,247 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:04,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-12-03 15:09:04,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-12-03 15:09:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7894, Invalid=19828, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 15:09:04,250 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 112 states. [2018-12-03 15:09:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:04,866 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2018-12-03 15:09:04,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 15:09:04,867 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 138 [2018-12-03 15:09:04,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:04,868 INFO L225 Difference]: With dead ends: 150 [2018-12-03 15:09:04,868 INFO L226 Difference]: Without dead ends: 148 [2018-12-03 15:09:04,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15849 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=7894, Invalid=19828, Unknown=0, NotChecked=0, Total=27722 [2018-12-03 15:09:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-03 15:09:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-03 15:09:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-03 15:09:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2018-12-03 15:09:04,875 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 138 [2018-12-03 15:09:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:04,875 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2018-12-03 15:09:04,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-12-03 15:09:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2018-12-03 15:09:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-12-03 15:09:04,876 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:04,877 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-12-03 15:09:04,877 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:04,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1839955936, now seen corresponding path program 28 times [2018-12-03 15:09:04,877 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:04,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:04,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:04,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:04,878 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:06,302 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 15:09:06,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:06,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:06,303 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:06,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:06,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:06,303 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 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 15:09:06,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:06,312 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:09:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:06,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:08,733 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 15:09:08,733 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:11,519 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 15:09:11,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:11,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 172 [2018-12-03 15:09:11,538 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:11,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-03 15:09:11,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-03 15:09:11,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8466, Invalid=21290, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 15:09:11,541 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 116 states. [2018-12-03 15:09:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:12,178 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2018-12-03 15:09:12,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 15:09:12,179 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 143 [2018-12-03 15:09:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:12,180 INFO L225 Difference]: With dead ends: 155 [2018-12-03 15:09:12,180 INFO L226 Difference]: Without dead ends: 153 [2018-12-03 15:09:12,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17038 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8466, Invalid=21290, Unknown=0, NotChecked=0, Total=29756 [2018-12-03 15:09:12,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-03 15:09:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-12-03 15:09:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-03 15:09:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2018-12-03 15:09:12,186 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 143 [2018-12-03 15:09:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:12,187 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2018-12-03 15:09:12,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-03 15:09:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2018-12-03 15:09:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-03 15:09:12,187 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:12,187 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-12-03 15:09:12,188 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:12,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash 893677036, now seen corresponding path program 29 times [2018-12-03 15:09:12,188 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:12,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:12,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:12,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:12,189 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:13,904 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 15:09:13,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:13,904 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:13,904 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:13,904 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:13,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:13,905 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 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 15:09:13,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:09:13,915 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:09:13,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-03 15:09:13,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:13,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:16,271 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 15:09:16,272 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:19,669 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 15:09:19,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:19,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 178 [2018-12-03 15:09:19,688 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:19,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-12-03 15:09:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-12-03 15:09:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9058, Invalid=22804, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 15:09:19,692 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 120 states. [2018-12-03 15:09:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:20,562 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2018-12-03 15:09:20,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 15:09:20,562 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 148 [2018-12-03 15:09:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:20,564 INFO L225 Difference]: With dead ends: 160 [2018-12-03 15:09:20,564 INFO L226 Difference]: Without dead ends: 158 [2018-12-03 15:09:20,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9058, Invalid=22804, Unknown=0, NotChecked=0, Total=31862 [2018-12-03 15:09:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-03 15:09:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-12-03 15:09:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-03 15:09:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2018-12-03 15:09:20,573 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 148 [2018-12-03 15:09:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:20,574 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2018-12-03 15:09:20,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-12-03 15:09:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2018-12-03 15:09:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-03 15:09:20,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:20,575 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-12-03 15:09:20,575 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:20,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1567987872, now seen corresponding path program 30 times [2018-12-03 15:09:20,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:20,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:20,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:20,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:20,577 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:22,429 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 15:09:22,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:22,429 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:22,429 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:22,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:22,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:22,429 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:09:22,437 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:09:22,437 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:09:22,472 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:09:22,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:22,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:24,906 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 15:09:24,906 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:28,285 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 15:09:28,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:28,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 184 [2018-12-03 15:09:28,304 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:28,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-12-03 15:09:28,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-12-03 15:09:28,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9670, Invalid=24370, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 15:09:28,307 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 124 states. [2018-12-03 15:09:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:28,949 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2018-12-03 15:09:28,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 15:09:28,949 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 153 [2018-12-03 15:09:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:28,951 INFO L225 Difference]: With dead ends: 165 [2018-12-03 15:09:28,951 INFO L226 Difference]: Without dead ends: 163 [2018-12-03 15:09:28,952 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19545 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=9670, Invalid=24370, Unknown=0, NotChecked=0, Total=34040 [2018-12-03 15:09:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-03 15:09:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-12-03 15:09:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-12-03 15:09:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2018-12-03 15:09:28,958 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 153 [2018-12-03 15:09:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:28,958 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2018-12-03 15:09:28,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-12-03 15:09:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2018-12-03 15:09:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-03 15:09:28,959 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:28,959 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-12-03 15:09:28,960 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:28,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:28,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1695168108, now seen corresponding path program 31 times [2018-12-03 15:09:28,960 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:28,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:28,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:28,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:28,961 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:30,442 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 15:09:30,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:30,443 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:30,443 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:30,443 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:30,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:30,443 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:09:30,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:30,454 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:09:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:30,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:33,353 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 15:09:33,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:36,872 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 15:09:36,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:36,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 190 [2018-12-03 15:09:36,891 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:36,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-12-03 15:09:36,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-12-03 15:09:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10302, Invalid=25988, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 15:09:36,894 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 128 states. [2018-12-03 15:09:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:37,584 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2018-12-03 15:09:37,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 15:09:37,584 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 158 [2018-12-03 15:09:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:37,586 INFO L225 Difference]: With dead ends: 170 [2018-12-03 15:09:37,586 INFO L226 Difference]: Without dead ends: 168 [2018-12-03 15:09:37,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20863 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=10302, Invalid=25988, Unknown=0, NotChecked=0, Total=36290 [2018-12-03 15:09:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-03 15:09:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-12-03 15:09:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-03 15:09:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2018-12-03 15:09:37,594 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 158 [2018-12-03 15:09:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:37,594 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2018-12-03 15:09:37,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-12-03 15:09:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2018-12-03 15:09:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-12-03 15:09:37,595 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:37,595 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-12-03 15:09:37,596 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:37,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1450316064, now seen corresponding path program 32 times [2018-12-03 15:09:37,596 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:37,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:37,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:09:37,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:37,597 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:40,297 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 15:09:40,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:40,298 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:40,298 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:40,298 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:40,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:40,298 INFO 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 15:09:40,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:09:40,306 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:09:40,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-03 15:09:40,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:40,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:43,235 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 15:09:43,235 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:46,920 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 15:09:46,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:46,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 196 [2018-12-03 15:09:46,940 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:46,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-12-03 15:09:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-12-03 15:09:46,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10954, Invalid=27658, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 15:09:46,944 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 132 states. [2018-12-03 15:09:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:47,648 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2018-12-03 15:09:47,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 15:09:47,648 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 163 [2018-12-03 15:09:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:47,649 INFO L225 Difference]: With dead ends: 175 [2018-12-03 15:09:47,649 INFO L226 Difference]: Without dead ends: 173 [2018-12-03 15:09:47,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22224 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=10954, Invalid=27658, Unknown=0, NotChecked=0, Total=38612 [2018-12-03 15:09:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-03 15:09:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-12-03 15:09:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-03 15:09:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2018-12-03 15:09:47,657 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 163 [2018-12-03 15:09:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:47,658 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2018-12-03 15:09:47,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-12-03 15:09:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2018-12-03 15:09:47,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-12-03 15:09:47,659 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:47,659 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-12-03 15:09:47,659 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:47,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2138087700, now seen corresponding path program 33 times [2018-12-03 15:09:47,660 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:47,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:47,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:47,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:47,661 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:09:50,027 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 15:09:50,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:50,027 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:09:50,027 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:09:50,027 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:09:50,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:09:50,027 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:09:50,036 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:09:50,036 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:09:50,077 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:09:50,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:09:50,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:09:53,149 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 15:09:53,150 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:09:57,047 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 15:09:57,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:09:57,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 202 [2018-12-03 15:09:57,079 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:09:57,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-03 15:09:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-03 15:09:57,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11626, Invalid=29380, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 15:09:57,083 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 136 states. [2018-12-03 15:09:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:09:58,109 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2018-12-03 15:09:58,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 15:09:58,109 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 168 [2018-12-03 15:09:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:09:58,110 INFO L225 Difference]: With dead ends: 180 [2018-12-03 15:09:58,110 INFO L226 Difference]: Without dead ends: 178 [2018-12-03 15:09:58,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23628 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=11626, Invalid=29380, Unknown=0, NotChecked=0, Total=41006 [2018-12-03 15:09:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-12-03 15:09:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-12-03 15:09:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-03 15:09:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2018-12-03 15:09:58,120 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 168 [2018-12-03 15:09:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:09:58,120 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2018-12-03 15:09:58,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-03 15:09:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2018-12-03 15:09:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-03 15:09:58,121 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:09:58,121 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-12-03 15:09:58,122 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:09:58,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:09:58,122 INFO L82 PathProgramCache]: Analyzing trace with hash 359536224, now seen corresponding path program 34 times [2018-12-03 15:09:58,122 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:09:58,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:58,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:09:58,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:09:58,123 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:09:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:00,048 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 15:10:00,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:00,049 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:00,049 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:00,049 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:00,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:00,049 INFO 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 15:10:00,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:10:00,079 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:10:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:00,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:04,202 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 15:10:04,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:08,548 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 15:10:08,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:08,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 208 [2018-12-03 15:10:08,582 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:08,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-12-03 15:10:08,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-12-03 15:10:08,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12318, Invalid=31154, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 15:10:08,586 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 140 states. [2018-12-03 15:10:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:09,503 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2018-12-03 15:10:09,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 15:10:09,503 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 173 [2018-12-03 15:10:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:09,504 INFO L225 Difference]: With dead ends: 185 [2018-12-03 15:10:09,504 INFO L226 Difference]: Without dead ends: 183 [2018-12-03 15:10:09,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25075 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=12318, Invalid=31154, Unknown=0, NotChecked=0, Total=43472 [2018-12-03 15:10:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-12-03 15:10:09,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-12-03 15:10:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-12-03 15:10:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2018-12-03 15:10:09,511 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 173 [2018-12-03 15:10:09,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:09,512 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2018-12-03 15:10:09,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-12-03 15:10:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2018-12-03 15:10:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-03 15:10:09,513 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:09,513 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-12-03 15:10:09,513 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:09,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash -400824468, now seen corresponding path program 35 times [2018-12-03 15:10:09,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:09,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:09,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:10:09,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:09,515 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:12,540 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 15:10:12,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:12,540 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:12,541 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:12,541 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:12,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:12,541 INFO 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 15:10:12,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:10:12,549 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:10:12,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-03 15:10:12,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:12,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:16,408 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 15:10:16,408 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:20,979 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 15:10:20,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:20,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 214 [2018-12-03 15:10:20,999 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:20,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-12-03 15:10:21,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-12-03 15:10:21,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13030, Invalid=32980, Unknown=0, NotChecked=0, Total=46010 [2018-12-03 15:10:21,002 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 144 states. [2018-12-03 15:10:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:21,911 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2018-12-03 15:10:21,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 15:10:21,911 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 178 [2018-12-03 15:10:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:21,912 INFO L225 Difference]: With dead ends: 190 [2018-12-03 15:10:21,912 INFO L226 Difference]: Without dead ends: 188 [2018-12-03 15:10:21,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26565 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13030, Invalid=32980, Unknown=0, NotChecked=0, Total=46010 [2018-12-03 15:10:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-12-03 15:10:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-12-03 15:10:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-12-03 15:10:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2018-12-03 15:10:21,921 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 178 [2018-12-03 15:10:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:21,921 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2018-12-03 15:10:21,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-12-03 15:10:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2018-12-03 15:10:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-12-03 15:10:21,922 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:21,922 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-12-03 15:10:21,923 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:21,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:21,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1927470560, now seen corresponding path program 36 times [2018-12-03 15:10:21,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:21,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:21,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:10:21,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:21,924 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:24,229 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 15:10:24,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:24,230 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:24,230 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:24,230 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:24,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:24,230 INFO 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 15:10:24,239 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:10:24,239 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:10:24,278 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:10:24,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:24,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:27,744 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 15:10:27,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:32,551 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 15:10:32,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:32,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 220 [2018-12-03 15:10:32,570 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:32,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-12-03 15:10:32,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-12-03 15:10:32,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13762, Invalid=34858, Unknown=0, NotChecked=0, Total=48620 [2018-12-03 15:10:32,574 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 148 states. [2018-12-03 15:10:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:33,596 INFO L93 Difference]: Finished difference Result 195 states and 233 transitions. [2018-12-03 15:10:33,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 15:10:33,597 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 183 [2018-12-03 15:10:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:33,598 INFO L225 Difference]: With dead ends: 195 [2018-12-03 15:10:33,598 INFO L226 Difference]: Without dead ends: 193 [2018-12-03 15:10:33,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28098 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=13762, Invalid=34858, Unknown=0, NotChecked=0, Total=48620 [2018-12-03 15:10:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-03 15:10:33,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-12-03 15:10:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-03 15:10:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2018-12-03 15:10:33,607 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 183 [2018-12-03 15:10:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:33,607 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2018-12-03 15:10:33,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-12-03 15:10:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2018-12-03 15:10:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-03 15:10:33,608 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:33,608 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-12-03 15:10:33,609 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:33,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1106759660, now seen corresponding path program 37 times [2018-12-03 15:10:33,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:33,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:33,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:10:33,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:33,610 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:36,639 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 15:10:36,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:36,640 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:36,640 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:36,640 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:36,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:36,640 INFO 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 15:10:36,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:10:36,650 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:10:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:36,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:40,509 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 15:10:40,509 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:45,540 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 15:10:45,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:45,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 226 [2018-12-03 15:10:45,560 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:45,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-12-03 15:10:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-12-03 15:10:45,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14514, Invalid=36788, Unknown=0, NotChecked=0, Total=51302 [2018-12-03 15:10:45,564 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 152 states. [2018-12-03 15:10:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:10:46,819 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2018-12-03 15:10:46,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 15:10:46,819 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 188 [2018-12-03 15:10:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:10:46,820 INFO L225 Difference]: With dead ends: 200 [2018-12-03 15:10:46,820 INFO L226 Difference]: Without dead ends: 198 [2018-12-03 15:10:46,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29674 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=14514, Invalid=36788, Unknown=0, NotChecked=0, Total=51302 [2018-12-03 15:10:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-03 15:10:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-12-03 15:10:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-12-03 15:10:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2018-12-03 15:10:46,829 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 188 [2018-12-03 15:10:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:10:46,829 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2018-12-03 15:10:46,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-12-03 15:10:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2018-12-03 15:10:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-12-03 15:10:46,830 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:10:46,830 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-12-03 15:10:46,830 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:10:46,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:10:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash -928758432, now seen corresponding path program 38 times [2018-12-03 15:10:46,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:10:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:46,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:10:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:10:46,832 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:10:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:10:49,461 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 15:10:49,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:49,462 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:10:49,462 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:10:49,462 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:10:49,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:10:49,462 INFO 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 15:10:49,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:10:49,470 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:10:49,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-03 15:10:49,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:10:49,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:10:53,494 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 15:10:53,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:10:58,814 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 15:10:58,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:10:58,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 232 [2018-12-03 15:10:58,833 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:10:58,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-12-03 15:10:58,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-12-03 15:10:58,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15286, Invalid=38770, Unknown=0, NotChecked=0, Total=54056 [2018-12-03 15:10:58,837 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 156 states. [2018-12-03 15:11:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:00,025 INFO L93 Difference]: Finished difference Result 205 states and 245 transitions. [2018-12-03 15:11:00,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 15:11:00,026 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 193 [2018-12-03 15:11:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:00,027 INFO L225 Difference]: With dead ends: 205 [2018-12-03 15:11:00,027 INFO L226 Difference]: Without dead ends: 203 [2018-12-03 15:11:00,029 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31293 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=15286, Invalid=38770, Unknown=0, NotChecked=0, Total=54056 [2018-12-03 15:11:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-03 15:11:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-12-03 15:11:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-12-03 15:11:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2018-12-03 15:11:00,035 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 193 [2018-12-03 15:11:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:00,035 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2018-12-03 15:11:00,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-12-03 15:11:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2018-12-03 15:11:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-12-03 15:11:00,037 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:00,037 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-12-03 15:11:00,037 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:00,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash -93644692, now seen corresponding path program 39 times [2018-12-03 15:11:00,037 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:00,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:00,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:11:00,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:00,038 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:03,043 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 15:11:03,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:03,044 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:03,044 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:03,044 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:03,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:03,044 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:11:03,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:11:03,053 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:11:03,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:11:03,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:11:03,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:07,102 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 15:11:07,102 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:12,643 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 15:11:12,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:12,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 238 [2018-12-03 15:11:12,662 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:12,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-12-03 15:11:12,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-12-03 15:11:12,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16078, Invalid=40804, Unknown=0, NotChecked=0, Total=56882 [2018-12-03 15:11:12,667 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 160 states. [2018-12-03 15:11:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:13,860 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2018-12-03 15:11:13,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 15:11:13,861 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 198 [2018-12-03 15:11:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:13,862 INFO L225 Difference]: With dead ends: 210 [2018-12-03 15:11:13,862 INFO L226 Difference]: Without dead ends: 208 [2018-12-03 15:11:13,864 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32955 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=16078, Invalid=40804, Unknown=0, NotChecked=0, Total=56882 [2018-12-03 15:11:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-03 15:11:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-12-03 15:11:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-12-03 15:11:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 244 transitions. [2018-12-03 15:11:13,869 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 244 transitions. Word has length 198 [2018-12-03 15:11:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:13,869 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 244 transitions. [2018-12-03 15:11:13,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-12-03 15:11:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 244 transitions. [2018-12-03 15:11:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-12-03 15:11:13,870 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:13,870 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-12-03 15:11:13,871 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:13,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:13,871 INFO L82 PathProgramCache]: Analyzing trace with hash 392842464, now seen corresponding path program 40 times [2018-12-03 15:11:13,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:13,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:13,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:11:13,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:13,872 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:16,745 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 15:11:16,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:16,746 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:16,746 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:16,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:16,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:16,746 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:11:16,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:11:16,755 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:11:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:16,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:20,979 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 15:11:20,980 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:26,902 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 15:11:26,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:26,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 244 [2018-12-03 15:11:26,922 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:26,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-12-03 15:11:26,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-12-03 15:11:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16890, Invalid=42890, Unknown=0, NotChecked=0, Total=59780 [2018-12-03 15:11:26,925 INFO L87 Difference]: Start difference. First operand 204 states and 244 transitions. Second operand 164 states. [2018-12-03 15:11:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:28,232 INFO L93 Difference]: Finished difference Result 215 states and 257 transitions. [2018-12-03 15:11:28,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 15:11:28,232 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 203 [2018-12-03 15:11:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:28,233 INFO L225 Difference]: With dead ends: 215 [2018-12-03 15:11:28,234 INFO L226 Difference]: Without dead ends: 213 [2018-12-03 15:11:28,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34660 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=16890, Invalid=42890, Unknown=0, NotChecked=0, Total=59780 [2018-12-03 15:11:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-12-03 15:11:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-12-03 15:11:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-12-03 15:11:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions. [2018-12-03 15:11:28,240 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 203 [2018-12-03 15:11:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:28,241 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions. [2018-12-03 15:11:28,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-12-03 15:11:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions. [2018-12-03 15:11:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-03 15:11:28,242 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:28,242 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-12-03 15:11:28,242 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:28,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1010974484, now seen corresponding path program 41 times [2018-12-03 15:11:28,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:28,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:28,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:11:28,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:28,243 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:30,937 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 15:11:30,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:30,937 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:30,937 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:30,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:30,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:30,937 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:11:30,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:11:30,946 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:11:31,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-03 15:11:31,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:11:31,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:37,681 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 15:11:37,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:44,022 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 15:11:44,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:44,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 250 [2018-12-03 15:11:44,043 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:44,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-12-03 15:11:44,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-12-03 15:11:44,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17722, Invalid=45028, Unknown=0, NotChecked=0, Total=62750 [2018-12-03 15:11:44,047 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand 168 states. [2018-12-03 15:11:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:11:45,514 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2018-12-03 15:11:45,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 15:11:45,514 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 208 [2018-12-03 15:11:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:11:45,515 INFO L225 Difference]: With dead ends: 220 [2018-12-03 15:11:45,516 INFO L226 Difference]: Without dead ends: 218 [2018-12-03 15:11:45,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36408 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=17722, Invalid=45028, Unknown=0, NotChecked=0, Total=62750 [2018-12-03 15:11:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-12-03 15:11:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-12-03 15:11:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-03 15:11:45,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2018-12-03 15:11:45,570 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 208 [2018-12-03 15:11:45,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:11:45,570 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2018-12-03 15:11:45,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-12-03 15:11:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2018-12-03 15:11:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-12-03 15:11:45,572 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:11:45,572 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-12-03 15:11:45,573 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:11:45,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:11:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash -638782368, now seen corresponding path program 42 times [2018-12-03 15:11:45,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:11:45,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:45,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:11:45,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:11:45,574 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:11:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:11:48,167 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 15:11:48,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:48,167 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:11:48,168 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:11:48,168 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:11:48,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:11:48,168 INFO 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 15:11:48,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:11:48,177 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:11:48,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:11:48,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:11:48,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:11:52,924 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 15:11:52,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:11:59,284 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 15:11:59,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:11:59,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 256 [2018-12-03 15:11:59,304 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:11:59,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-12-03 15:11:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-12-03 15:11:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18574, Invalid=47218, Unknown=0, NotChecked=0, Total=65792 [2018-12-03 15:11:59,308 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand 172 states. [2018-12-03 15:12:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:00,798 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2018-12-03 15:12:00,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 15:12:00,798 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 213 [2018-12-03 15:12:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:00,799 INFO L225 Difference]: With dead ends: 225 [2018-12-03 15:12:00,799 INFO L226 Difference]: Without dead ends: 223 [2018-12-03 15:12:00,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38199 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=18574, Invalid=47218, Unknown=0, NotChecked=0, Total=65792 [2018-12-03 15:12:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-12-03 15:12:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-12-03 15:12:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-03 15:12:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2018-12-03 15:12:00,808 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 213 [2018-12-03 15:12:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:00,809 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2018-12-03 15:12:00,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-12-03 15:12:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2018-12-03 15:12:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-03 15:12:00,810 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:00,810 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-12-03 15:12:00,810 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:00,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:00,811 INFO L82 PathProgramCache]: Analyzing trace with hash 372754796, now seen corresponding path program 43 times [2018-12-03 15:12:00,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:00,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:00,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:12:00,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:00,812 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:03,520 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 15:12:03,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:03,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:03,521 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:03,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:03,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:03,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:12:03,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:12:03,529 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:12:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:03,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:12:08,445 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 15:12:08,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:15,090 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 15:12:15,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:15,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 262 [2018-12-03 15:12:15,109 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:15,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-12-03 15:12:15,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-12-03 15:12:15,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19446, Invalid=49460, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 15:12:15,112 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand 176 states. [2018-12-03 15:12:16,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:16,611 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2018-12-03 15:12:16,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 15:12:16,612 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 218 [2018-12-03 15:12:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:16,613 INFO L225 Difference]: With dead ends: 230 [2018-12-03 15:12:16,613 INFO L226 Difference]: Without dead ends: 228 [2018-12-03 15:12:16,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40033 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=19446, Invalid=49460, Unknown=0, NotChecked=0, Total=68906 [2018-12-03 15:12:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-12-03 15:12:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-12-03 15:12:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-12-03 15:12:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 268 transitions. [2018-12-03 15:12:16,620 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 268 transitions. Word has length 218 [2018-12-03 15:12:16,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:16,620 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 268 transitions. [2018-12-03 15:12:16,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-12-03 15:12:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 268 transitions. [2018-12-03 15:12:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-12-03 15:12:16,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:16,621 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-12-03 15:12:16,622 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:16,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2065417248, now seen corresponding path program 44 times [2018-12-03 15:12:16,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:16,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:16,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:12:16,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:16,623 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:19,465 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 15:12:19,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:19,465 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:19,465 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:19,465 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:19,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:19,465 INFO 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 15:12:19,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:12:19,515 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:12:19,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-12-03 15:12:19,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:12:19,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:12:24,572 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 15:12:24,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:31,891 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 15:12:31,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:31,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 268 [2018-12-03 15:12:31,910 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:31,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-12-03 15:12:31,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-12-03 15:12:31,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20338, Invalid=51754, Unknown=0, NotChecked=0, Total=72092 [2018-12-03 15:12:31,913 INFO L87 Difference]: Start difference. First operand 224 states and 268 transitions. Second operand 180 states. [2018-12-03 15:12:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:33,601 INFO L93 Difference]: Finished difference Result 235 states and 281 transitions. [2018-12-03 15:12:33,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 15:12:33,601 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 223 [2018-12-03 15:12:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:33,602 INFO L225 Difference]: With dead ends: 235 [2018-12-03 15:12:33,603 INFO L226 Difference]: Without dead ends: 233 [2018-12-03 15:12:33,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41910 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=20338, Invalid=51754, Unknown=0, NotChecked=0, Total=72092 [2018-12-03 15:12:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-12-03 15:12:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-12-03 15:12:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-03 15:12:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2018-12-03 15:12:33,611 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 223 [2018-12-03 15:12:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:33,612 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2018-12-03 15:12:33,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-12-03 15:12:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2018-12-03 15:12:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-12-03 15:12:33,613 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:33,613 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-12-03 15:12:33,613 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:33,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:33,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1340001812, now seen corresponding path program 45 times [2018-12-03 15:12:33,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:33,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:33,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:12:33,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:33,615 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:36,514 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 15:12:36,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:36,515 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:36,515 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:36,515 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:36,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:36,515 INFO 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 15:12:36,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:12:36,527 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:12:36,577 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:12:36,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:12:36,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:12:41,761 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 15:12:41,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:12:49,063 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 15:12:49,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:12:49,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 274 [2018-12-03 15:12:49,082 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:12:49,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-12-03 15:12:49,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-12-03 15:12:49,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21250, Invalid=54100, Unknown=0, NotChecked=0, Total=75350 [2018-12-03 15:12:49,087 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand 184 states. [2018-12-03 15:12:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:12:50,803 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2018-12-03 15:12:50,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 15:12:50,803 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 228 [2018-12-03 15:12:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:12:50,804 INFO L225 Difference]: With dead ends: 240 [2018-12-03 15:12:50,804 INFO L226 Difference]: Without dead ends: 238 [2018-12-03 15:12:50,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43830 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=21250, Invalid=54100, Unknown=0, NotChecked=0, Total=75350 [2018-12-03 15:12:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-12-03 15:12:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-12-03 15:12:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-03 15:12:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2018-12-03 15:12:50,814 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 228 [2018-12-03 15:12:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:12:50,814 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2018-12-03 15:12:50,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-12-03 15:12:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2018-12-03 15:12:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-12-03 15:12:50,815 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:12:50,816 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-12-03 15:12:50,816 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:12:50,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:12:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash 117973856, now seen corresponding path program 46 times [2018-12-03 15:12:50,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:12:50,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:50,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:12:50,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:12:50,817 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:12:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:54,363 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 15:12:54,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:54,364 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:12:54,364 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:12:54,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:12:54,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:12:54,364 INFO 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 15:12:54,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:12:54,374 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:12:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:12:54,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:00,168 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 15:13:00,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:13:08,141 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 15:13:08,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:13:08,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 280 [2018-12-03 15:13:08,160 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:13:08,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-12-03 15:13:08,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-12-03 15:13:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22182, Invalid=56498, Unknown=0, NotChecked=0, Total=78680 [2018-12-03 15:13:08,163 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand 188 states. [2018-12-03 15:13:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:13:10,041 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2018-12-03 15:13:10,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 15:13:10,041 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 233 [2018-12-03 15:13:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:13:10,042 INFO L225 Difference]: With dead ends: 245 [2018-12-03 15:13:10,043 INFO L226 Difference]: Without dead ends: 243 [2018-12-03 15:13:10,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45793 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=22182, Invalid=56498, Unknown=0, NotChecked=0, Total=78680 [2018-12-03 15:13:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-03 15:13:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-12-03 15:13:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-12-03 15:13:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2018-12-03 15:13:10,053 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 233 [2018-12-03 15:13:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:13:10,053 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2018-12-03 15:13:10,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-12-03 15:13:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2018-12-03 15:13:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-12-03 15:13:10,054 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:13:10,055 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-12-03 15:13:10,055 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:13:10,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:13:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 365034092, now seen corresponding path program 47 times [2018-12-03 15:13:10,055 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:13:10,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:10,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:13:10,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:10,056 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:13:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:13,413 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 15:13:13,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:13,414 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:13:13,414 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:13:13,414 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:13:13,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:13,414 INFO 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 15:13:13,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:13:13,423 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:13:13,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-12-03 15:13:13,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:13:13,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:19,306 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 15:13:19,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:13:27,098 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 15:13:27,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:13:27,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 286 [2018-12-03 15:13:27,120 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:13:27,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-12-03 15:13:27,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-12-03 15:13:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23134, Invalid=58948, Unknown=0, NotChecked=0, Total=82082 [2018-12-03 15:13:27,124 INFO L87 Difference]: Start difference. First operand 239 states and 286 transitions. Second operand 192 states. [2018-12-03 15:13:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:13:28,938 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2018-12-03 15:13:28,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-03 15:13:28,938 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 238 [2018-12-03 15:13:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:13:28,939 INFO L225 Difference]: With dead ends: 250 [2018-12-03 15:13:28,939 INFO L226 Difference]: Without dead ends: 248 [2018-12-03 15:13:28,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47799 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=23134, Invalid=58948, Unknown=0, NotChecked=0, Total=82082 [2018-12-03 15:13:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-12-03 15:13:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-12-03 15:13:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-12-03 15:13:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2018-12-03 15:13:28,946 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 238 [2018-12-03 15:13:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:13:28,947 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2018-12-03 15:13:28,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-12-03 15:13:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2018-12-03 15:13:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-12-03 15:13:28,948 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:13:28,948 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-12-03 15:13:28,948 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:13:28,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:13:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1225829088, now seen corresponding path program 48 times [2018-12-03 15:13:28,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:13:28,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:28,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:13:28,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:28,949 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:13:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:32,090 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 15:13:32,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:32,090 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:13:32,091 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:13:32,091 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:13:32,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:32,091 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:13:32,102 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:13:32,102 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:13:32,158 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:13:32,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:13:32,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:38,174 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 15:13:38,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:13:46,440 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 15:13:46,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:13:46,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 292 [2018-12-03 15:13:46,459 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:13:46,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-12-03 15:13:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-12-03 15:13:46,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24106, Invalid=61450, Unknown=0, NotChecked=0, Total=85556 [2018-12-03 15:13:46,462 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand 196 states. [2018-12-03 15:13:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:13:48,385 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2018-12-03 15:13:48,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-12-03 15:13:48,385 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 243 [2018-12-03 15:13:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:13:48,386 INFO L225 Difference]: With dead ends: 255 [2018-12-03 15:13:48,386 INFO L226 Difference]: Without dead ends: 253 [2018-12-03 15:13:48,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49848 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=24106, Invalid=61450, Unknown=0, NotChecked=0, Total=85556 [2018-12-03 15:13:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-12-03 15:13:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-12-03 15:13:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-12-03 15:13:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2018-12-03 15:13:48,394 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 243 [2018-12-03 15:13:48,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:13:48,394 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2018-12-03 15:13:48,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-12-03 15:13:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2018-12-03 15:13:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-12-03 15:13:48,395 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:13:48,396 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-12-03 15:13:48,396 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:13:48,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:13:48,396 INFO L82 PathProgramCache]: Analyzing trace with hash 291644140, now seen corresponding path program 49 times [2018-12-03 15:13:48,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:13:48,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:48,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:13:48,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:13:48,397 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:13:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:51,752 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 15:13:51,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:51,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:13:51,753 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:13:51,753 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:13:51,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:13:51,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:13:51,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:13:51,762 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:13:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:13:51,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:13:57,916 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 15:13:57,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:14:06,609 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 15:14:06,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:14:06,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 298 [2018-12-03 15:14:06,628 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:14:06,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-12-03 15:14:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-12-03 15:14:06,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25098, Invalid=64004, Unknown=0, NotChecked=0, Total=89102 [2018-12-03 15:14:06,633 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand 200 states. [2018-12-03 15:14:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:14:08,900 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2018-12-03 15:14:08,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-12-03 15:14:08,901 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 248 [2018-12-03 15:14:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:14:08,902 INFO L225 Difference]: With dead ends: 260 [2018-12-03 15:14:08,902 INFO L226 Difference]: Without dead ends: 258 [2018-12-03 15:14:08,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51940 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=25098, Invalid=64004, Unknown=0, NotChecked=0, Total=89102 [2018-12-03 15:14:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-03 15:14:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-12-03 15:14:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-12-03 15:14:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2018-12-03 15:14:08,913 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 248 [2018-12-03 15:14:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:14:08,913 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2018-12-03 15:14:08,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-12-03 15:14:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2018-12-03 15:14:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-12-03 15:14:08,914 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:14:08,915 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-12-03 15:14:08,915 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:14:08,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:14:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1380593056, now seen corresponding path program 50 times [2018-12-03 15:14:08,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:14:08,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:08,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:14:08,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:08,916 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:14:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:12,420 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 15:14:12,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:12,420 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:14:12,420 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:14:12,420 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:14:12,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:12,421 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 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 15:14:12,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:14:12,430 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:14:12,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-12-03 15:14:12,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:14:12,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:14:18,805 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 15:14:18,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:14:27,850 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 15:14:27,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:14:27,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 304 [2018-12-03 15:14:27,869 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:14:27,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-12-03 15:14:27,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-12-03 15:14:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26109, Invalid=66611, Unknown=0, NotChecked=0, Total=92720 [2018-12-03 15:14:27,873 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand 204 states. [2018-12-03 15:14:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:14:30,034 INFO L93 Difference]: Finished difference Result 265 states and 317 transitions. [2018-12-03 15:14:30,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-12-03 15:14:30,035 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 253 [2018-12-03 15:14:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:14:30,036 INFO L225 Difference]: With dead ends: 265 [2018-12-03 15:14:30,036 INFO L226 Difference]: Without dead ends: 263 [2018-12-03 15:14:30,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54173 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=26109, Invalid=66611, Unknown=0, NotChecked=0, Total=92720 [2018-12-03 15:14:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-12-03 15:14:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-12-03 15:14:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-03 15:14:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 310 transitions. [2018-12-03 15:14:30,045 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 310 transitions. Word has length 253 [2018-12-03 15:14:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:14:30,046 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 310 transitions. [2018-12-03 15:14:30,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-12-03 15:14:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 310 transitions. [2018-12-03 15:14:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-03 15:14:30,047 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:14:30,047 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-12-03 15:14:30,048 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:14:30,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:14:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash 860466028, now seen corresponding path program 51 times [2018-12-03 15:14:30,048 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:14:30,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:30,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:14:30,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:30,049 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:14:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:33,903 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 15:14:33,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:33,904 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:14:33,904 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:14:33,904 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:14:33,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:33,904 INFO 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 15:14:33,914 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:14:33,915 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:14:33,973 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:14:33,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:14:33,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:14:40,876 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 15:14:40,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:14:50,195 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 15:14:50,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:14:50,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 310 [2018-12-03 15:14:50,214 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:14:50,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-12-03 15:14:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-12-03 15:14:50,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27130, Invalid=69280, Unknown=0, NotChecked=0, Total=96410 [2018-12-03 15:14:50,219 INFO L87 Difference]: Start difference. First operand 259 states and 310 transitions. Second operand 208 states. [2018-12-03 15:14:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:14:52,583 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2018-12-03 15:14:52,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-12-03 15:14:52,584 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 258 [2018-12-03 15:14:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:14:52,585 INFO L225 Difference]: With dead ends: 270 [2018-12-03 15:14:52,585 INFO L226 Difference]: Without dead ends: 268 [2018-12-03 15:14:52,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56746 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=27130, Invalid=69280, Unknown=0, NotChecked=0, Total=96410 [2018-12-03 15:14:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-12-03 15:14:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-12-03 15:14:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-12-03 15:14:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 316 transitions. [2018-12-03 15:14:52,596 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 316 transitions. Word has length 258 [2018-12-03 15:14:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:14:52,596 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 316 transitions. [2018-12-03 15:14:52,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-12-03 15:14:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 316 transitions. [2018-12-03 15:14:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-12-03 15:14:52,597 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:14:52,598 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-12-03 15:14:52,598 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:14:52,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:14:52,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1850762784, now seen corresponding path program 52 times [2018-12-03 15:14:52,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:14:52,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:52,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:14:52,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:14:52,599 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:14:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:56,642 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 15:14:56,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:56,642 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:14:56,642 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:14:56,642 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:14:56,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:14:56,643 INFO 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 15:14:56,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:14:56,652 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:14:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:14:56,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:15:03,526 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 15:15:03,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:15:13,005 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 15:15:13,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:15:13,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 316 [2018-12-03 15:15:13,024 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:15:13,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-12-03 15:15:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-12-03 15:15:13,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28159, Invalid=72013, Unknown=0, NotChecked=0, Total=100172 [2018-12-03 15:15:13,028 INFO L87 Difference]: Start difference. First operand 264 states and 316 transitions. Second operand 212 states. [2018-12-03 15:15:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:15:15,518 INFO L93 Difference]: Finished difference Result 275 states and 329 transitions. [2018-12-03 15:15:15,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-12-03 15:15:15,518 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 263 [2018-12-03 15:15:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:15:15,519 INFO L225 Difference]: With dead ends: 275 [2018-12-03 15:15:15,520 INFO L226 Difference]: Without dead ends: 273 [2018-12-03 15:15:15,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59374 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=28159, Invalid=72013, Unknown=0, NotChecked=0, Total=100172 [2018-12-03 15:15:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-03 15:15:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-12-03 15:15:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-12-03 15:15:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 322 transitions. [2018-12-03 15:15:15,528 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 322 transitions. Word has length 263 [2018-12-03 15:15:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:15:15,528 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 322 transitions. [2018-12-03 15:15:15,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-12-03 15:15:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 322 transitions. [2018-12-03 15:15:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-12-03 15:15:15,529 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:15:15,529 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-12-03 15:15:15,529 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:15:15,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:15:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1371575276, now seen corresponding path program 53 times [2018-12-03 15:15:15,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:15:15,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:15,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:15:15,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:15,530 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:15:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:15:19,378 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 15:15:19,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:19,378 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:15:19,378 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:15:19,378 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:15:19,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:19,379 INFO 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 15:15:19,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:15:19,389 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:15:19,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-12-03 15:15:19,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:15:19,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:15:26,584 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 15:15:26,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:15:36,171 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 15:15:36,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:15:36,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2018-12-03 15:15:36,190 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:15:36,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-12-03 15:15:36,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-12-03 15:15:36,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29196, Invalid=74810, Unknown=0, NotChecked=0, Total=104006 [2018-12-03 15:15:36,196 INFO L87 Difference]: Start difference. First operand 269 states and 322 transitions. Second operand 216 states. [2018-12-03 15:15:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:15:38,715 INFO L93 Difference]: Finished difference Result 280 states and 335 transitions. [2018-12-03 15:15:38,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-12-03 15:15:38,715 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 268 [2018-12-03 15:15:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:15:38,716 INFO L225 Difference]: With dead ends: 280 [2018-12-03 15:15:38,716 INFO L226 Difference]: Without dead ends: 278 [2018-12-03 15:15:38,718 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62057 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=29196, Invalid=74810, Unknown=0, NotChecked=0, Total=104006 [2018-12-03 15:15:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-12-03 15:15:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-12-03 15:15:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-03 15:15:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 328 transitions. [2018-12-03 15:15:38,724 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 328 transitions. Word has length 268 [2018-12-03 15:15:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:15:38,724 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 328 transitions. [2018-12-03 15:15:38,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-12-03 15:15:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 328 transitions. [2018-12-03 15:15:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-12-03 15:15:38,725 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:15:38,726 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-12-03 15:15:38,726 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:15:38,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:15:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash -877264544, now seen corresponding path program 54 times [2018-12-03 15:15:38,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:15:38,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:38,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:15:38,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:15:38,727 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:15:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:15:43,099 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 15:15:43,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:43,099 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:15:43,099 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:15:43,099 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:15:43,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:15:43,100 INFO 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 15:15:43,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:15:43,109 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:15:43,171 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:15:43,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:15:43,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:15:50,447 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 15:15:50,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:16:00,296 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 15:16:00,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:16:00,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 328 [2018-12-03 15:16:00,315 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:16:00,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-12-03 15:16:00,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-12-03 15:16:00,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30241, Invalid=77671, Unknown=0, NotChecked=0, Total=107912 [2018-12-03 15:16:00,320 INFO L87 Difference]: Start difference. First operand 274 states and 328 transitions. Second operand 220 states. [2018-12-03 15:16:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:16:03,006 INFO L93 Difference]: Finished difference Result 285 states and 341 transitions. [2018-12-03 15:16:03,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-12-03 15:16:03,006 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 273 [2018-12-03 15:16:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:16:03,007 INFO L225 Difference]: With dead ends: 285 [2018-12-03 15:16:03,008 INFO L226 Difference]: Without dead ends: 283 [2018-12-03 15:16:03,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64795 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=30241, Invalid=77671, Unknown=0, NotChecked=0, Total=107912 [2018-12-03 15:16:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-12-03 15:16:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-12-03 15:16:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-12-03 15:16:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 334 transitions. [2018-12-03 15:16:03,018 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 334 transitions. Word has length 273 [2018-12-03 15:16:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:16:03,018 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 334 transitions. [2018-12-03 15:16:03,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-12-03 15:16:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 334 transitions. [2018-12-03 15:16:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-12-03 15:16:03,020 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:16:03,020 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-12-03 15:16:03,021 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:16:03,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:16:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash 151968876, now seen corresponding path program 55 times [2018-12-03 15:16:03,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:16:03,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:03,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:16:03,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:03,022 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:16:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:07,584 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 15:16:07,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:07,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:16:07,585 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:16:07,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:16:07,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:07,585 INFO 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 15:16:07,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:16:07,595 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:16:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:07,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:16:15,079 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 15:16:15,079 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:16:25,177 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 15:16:25,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:16:25,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112, 112] total 334 [2018-12-03 15:16:25,196 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:16:25,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-12-03 15:16:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-12-03 15:16:25,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31294, Invalid=80596, Unknown=0, NotChecked=0, Total=111890 [2018-12-03 15:16:25,201 INFO L87 Difference]: Start difference. First operand 279 states and 334 transitions. Second operand 224 states. [2018-12-03 15:16:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:16:28,231 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2018-12-03 15:16:28,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-12-03 15:16:28,232 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 278 [2018-12-03 15:16:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:16:28,233 INFO L225 Difference]: With dead ends: 290 [2018-12-03 15:16:28,233 INFO L226 Difference]: Without dead ends: 288 [2018-12-03 15:16:28,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67588 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=31294, Invalid=80596, Unknown=0, NotChecked=0, Total=111890 [2018-12-03 15:16:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-12-03 15:16:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-12-03 15:16:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-03 15:16:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 340 transitions. [2018-12-03 15:16:28,241 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 340 transitions. Word has length 278 [2018-12-03 15:16:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:16:28,241 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 340 transitions. [2018-12-03 15:16:28,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-12-03 15:16:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 340 transitions. [2018-12-03 15:16:28,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-12-03 15:16:28,242 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:16:28,242 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-12-03 15:16:28,242 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:16:28,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:16:28,243 INFO L82 PathProgramCache]: Analyzing trace with hash 746653920, now seen corresponding path program 56 times [2018-12-03 15:16:28,243 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:16:28,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:28,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:16:28,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:28,244 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:16:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:32,775 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 15:16:32,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:32,775 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:16:32,775 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:16:32,775 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:16:32,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:32,775 INFO 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 15:16:32,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:16:32,784 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:16:32,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-12-03 15:16:32,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:16:32,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:16:40,693 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 15:16:40,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:16:50,941 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 15:16:50,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:16:50,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114, 114] total 340 [2018-12-03 15:16:50,960 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:16:50,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-12-03 15:16:50,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-12-03 15:16:50,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32355, Invalid=83585, Unknown=0, NotChecked=0, Total=115940 [2018-12-03 15:16:50,965 INFO L87 Difference]: Start difference. First operand 284 states and 340 transitions. Second operand 228 states. [2018-12-03 15:16:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:16:53,898 INFO L93 Difference]: Finished difference Result 295 states and 353 transitions. [2018-12-03 15:16:53,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-12-03 15:16:53,899 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 283 [2018-12-03 15:16:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:16:53,900 INFO L225 Difference]: With dead ends: 295 [2018-12-03 15:16:53,900 INFO L226 Difference]: Without dead ends: 293 [2018-12-03 15:16:53,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70436 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=32355, Invalid=83585, Unknown=0, NotChecked=0, Total=115940 [2018-12-03 15:16:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-12-03 15:16:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-12-03 15:16:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-12-03 15:16:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 346 transitions. [2018-12-03 15:16:53,908 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 346 transitions. Word has length 283 [2018-12-03 15:16:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:16:53,908 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 346 transitions. [2018-12-03 15:16:53,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-12-03 15:16:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 346 transitions. [2018-12-03 15:16:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-12-03 15:16:53,910 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:16:53,910 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-12-03 15:16:53,910 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:16:53,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:16:53,910 INFO L82 PathProgramCache]: Analyzing trace with hash 998016236, now seen corresponding path program 57 times [2018-12-03 15:16:53,910 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:16:53,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:53,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:16:53,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:16:53,911 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:16:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:16:58,703 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 15:16:58,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:58,703 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:16:58,704 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:16:58,704 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:16:58,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:16:58,704 INFO 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 15:16:58,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:16:58,713 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:16:58,776 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:16:58,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:16:58,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:17:06,875 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 15:17:06,875 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:17:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:17:17,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:17:17,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116, 116] total 346 [2018-12-03 15:17:17,371 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:17:17,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-12-03 15:17:17,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-12-03 15:17:17,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33424, Invalid=86638, Unknown=0, NotChecked=0, Total=120062 [2018-12-03 15:17:17,376 INFO L87 Difference]: Start difference. First operand 289 states and 346 transitions. Second operand 232 states. [2018-12-03 15:17:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:17:20,476 INFO L93 Difference]: Finished difference Result 300 states and 359 transitions. [2018-12-03 15:17:20,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-12-03 15:17:20,476 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 288 [2018-12-03 15:17:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:17:20,477 INFO L225 Difference]: With dead ends: 300 [2018-12-03 15:17:20,477 INFO L226 Difference]: Without dead ends: 298 [2018-12-03 15:17:20,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73339 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=33424, Invalid=86638, Unknown=0, NotChecked=0, Total=120062 [2018-12-03 15:17:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-12-03 15:17:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-12-03 15:17:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-12-03 15:17:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 352 transitions. [2018-12-03 15:17:20,488 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 352 transitions. Word has length 288 [2018-12-03 15:17:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:17:20,488 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 352 transitions. [2018-12-03 15:17:20,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-12-03 15:17:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 352 transitions. [2018-12-03 15:17:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-12-03 15:17:20,490 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:17:20,490 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-12-03 15:17:20,490 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:17:20,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:17:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash -20402080, now seen corresponding path program 58 times [2018-12-03 15:17:20,491 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:17:20,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:20,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:17:20,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:20,492 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:17:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:17:25,426 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 15:17:25,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:25,426 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:17:25,426 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:17:25,426 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:17:25,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:25,426 INFO 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 15:17:25,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:17:25,438 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:17:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:17:25,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:17:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:17:33,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:17:44,549 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 15:17:44,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:17:44,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 352 [2018-12-03 15:17:44,568 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:17:44,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-12-03 15:17:44,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-12-03 15:17:44,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34501, Invalid=89755, Unknown=0, NotChecked=0, Total=124256 [2018-12-03 15:17:44,573 INFO L87 Difference]: Start difference. First operand 294 states and 352 transitions. Second operand 236 states. [2018-12-03 15:17:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:17:47,758 INFO L93 Difference]: Finished difference Result 305 states and 365 transitions. [2018-12-03 15:17:47,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-12-03 15:17:47,758 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 293 [2018-12-03 15:17:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:17:47,759 INFO L225 Difference]: With dead ends: 305 [2018-12-03 15:17:47,759 INFO L226 Difference]: Without dead ends: 303 [2018-12-03 15:17:47,763 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76297 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=34501, Invalid=89755, Unknown=0, NotChecked=0, Total=124256 [2018-12-03 15:17:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-12-03 15:17:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-12-03 15:17:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-03 15:17:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 358 transitions. [2018-12-03 15:17:47,772 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 358 transitions. Word has length 293 [2018-12-03 15:17:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:17:47,772 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 358 transitions. [2018-12-03 15:17:47,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-12-03 15:17:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 358 transitions. [2018-12-03 15:17:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-12-03 15:17:47,774 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:17:47,774 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-12-03 15:17:47,774 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:17:47,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:17:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1856926356, now seen corresponding path program 59 times [2018-12-03 15:17:47,775 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:17:47,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:47,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:17:47,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:17:47,776 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:17:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:17:52,891 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 15:17:52,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:52,891 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:17:52,891 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:17:52,891 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:17:52,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:17:52,892 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:17:52,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:17:52,900 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:17:53,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-12-03 15:17:53,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:17:53,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:18:01,643 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 15:18:01,644 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:18:12,471 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 15:18:12,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:18:12,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120, 120] total 358 [2018-12-03 15:18:12,490 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:18:12,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-12-03 15:18:12,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-12-03 15:18:12,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35586, Invalid=92936, Unknown=0, NotChecked=0, Total=128522 [2018-12-03 15:18:12,495 INFO L87 Difference]: Start difference. First operand 299 states and 358 transitions. Second operand 240 states. [2018-12-03 15:18:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:18:15,871 INFO L93 Difference]: Finished difference Result 310 states and 371 transitions. [2018-12-03 15:18:15,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-12-03 15:18:15,872 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 298 [2018-12-03 15:18:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:18:15,873 INFO L225 Difference]: With dead ends: 310 [2018-12-03 15:18:15,873 INFO L226 Difference]: Without dead ends: 308 [2018-12-03 15:18:15,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79310 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=35586, Invalid=92936, Unknown=0, NotChecked=0, Total=128522 [2018-12-03 15:18:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-12-03 15:18:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-12-03 15:18:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-03 15:18:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 364 transitions. [2018-12-03 15:18:15,881 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 364 transitions. Word has length 298 [2018-12-03 15:18:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:18:15,881 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 364 transitions. [2018-12-03 15:18:15,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-12-03 15:18:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 364 transitions. [2018-12-03 15:18:15,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-12-03 15:18:15,883 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:18:15,883 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-12-03 15:18:15,883 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:18:15,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:18:15,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2025523232, now seen corresponding path program 60 times [2018-12-03 15:18:15,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:18:15,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:15,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:18:15,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:15,884 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:18:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:18:21,100 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 15:18:21,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:21,100 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:18:21,100 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:18:21,100 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:18:21,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:21,100 INFO 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 15:18:21,110 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:18:21,110 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:18:21,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:18:21,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:18:21,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:18:30,021 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 15:18:30,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:18:41,336 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 15:18:41,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:18:41,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 364 [2018-12-03 15:18:41,356 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:18:41,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-12-03 15:18:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-12-03 15:18:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36679, Invalid=96181, Unknown=0, NotChecked=0, Total=132860 [2018-12-03 15:18:41,360 INFO L87 Difference]: Start difference. First operand 304 states and 364 transitions. Second operand 244 states. [2018-12-03 15:18:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:18:44,904 INFO L93 Difference]: Finished difference Result 315 states and 377 transitions. [2018-12-03 15:18:44,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-12-03 15:18:44,904 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 303 [2018-12-03 15:18:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:18:44,906 INFO L225 Difference]: With dead ends: 315 [2018-12-03 15:18:44,906 INFO L226 Difference]: Without dead ends: 313 [2018-12-03 15:18:44,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82378 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=36679, Invalid=96181, Unknown=0, NotChecked=0, Total=132860 [2018-12-03 15:18:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-03 15:18:44,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-12-03 15:18:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-12-03 15:18:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 370 transitions. [2018-12-03 15:18:44,914 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 370 transitions. Word has length 303 [2018-12-03 15:18:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:18:44,915 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 370 transitions. [2018-12-03 15:18:44,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-12-03 15:18:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 370 transitions. [2018-12-03 15:18:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-03 15:18:44,916 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:18:44,916 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-12-03 15:18:44,916 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:18:44,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:18:44,916 INFO L82 PathProgramCache]: Analyzing trace with hash -120195604, now seen corresponding path program 61 times [2018-12-03 15:18:44,917 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:18:44,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:44,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:18:44,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:18:44,918 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:18:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:18:50,246 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 15:18:50,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:50,246 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:18:50,246 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:18:50,247 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:18:50,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:18:50,247 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 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 15:18:50,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:18:50,258 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:18:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:18:50,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:18:59,563 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 15:18:59,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:19:11,193 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 15:19:11,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:19:11,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124, 124] total 370 [2018-12-03 15:19:11,212 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:19:11,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 248 states [2018-12-03 15:19:11,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2018-12-03 15:19:11,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37780, Invalid=99490, Unknown=0, NotChecked=0, Total=137270 [2018-12-03 15:19:11,218 INFO L87 Difference]: Start difference. First operand 309 states and 370 transitions. Second operand 248 states. [2018-12-03 15:19:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:19:14,821 INFO L93 Difference]: Finished difference Result 320 states and 383 transitions. [2018-12-03 15:19:14,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-12-03 15:19:14,821 INFO L78 Accepts]: Start accepts. Automaton has 248 states. Word has length 308 [2018-12-03 15:19:14,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:19:14,822 INFO L225 Difference]: With dead ends: 320 [2018-12-03 15:19:14,823 INFO L226 Difference]: Without dead ends: 318 [2018-12-03 15:19:14,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85501 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=37780, Invalid=99490, Unknown=0, NotChecked=0, Total=137270 [2018-12-03 15:19:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-03 15:19:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-12-03 15:19:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-03 15:19:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 376 transitions. [2018-12-03 15:19:14,834 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 376 transitions. Word has length 308 [2018-12-03 15:19:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:19:14,834 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 376 transitions. [2018-12-03 15:19:14,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 248 states. [2018-12-03 15:19:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 376 transitions. [2018-12-03 15:19:14,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-12-03 15:19:14,836 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:19:14,836 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-12-03 15:19:14,836 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:19:14,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:19:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2068979872, now seen corresponding path program 62 times [2018-12-03 15:19:14,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:19:14,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:14,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:19:14,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:14,838 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:19:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:19:20,423 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 15:19:20,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:20,423 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:19:20,423 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:19:20,424 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:19:20,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:20,424 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 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 15:19:20,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:19:20,434 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:19:20,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-12-03 15:19:20,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:19:20,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:19:30,054 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 15:19:30,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:19:41,595 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 15:19:41,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:19:41,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126, 126] total 376 [2018-12-03 15:19:41,615 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:19:41,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 252 states [2018-12-03 15:19:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2018-12-03 15:19:41,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38889, Invalid=102863, Unknown=0, NotChecked=0, Total=141752 [2018-12-03 15:19:41,621 INFO L87 Difference]: Start difference. First operand 314 states and 376 transitions. Second operand 252 states. [2018-12-03 15:19:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:19:45,331 INFO L93 Difference]: Finished difference Result 325 states and 389 transitions. [2018-12-03 15:19:45,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-12-03 15:19:45,331 INFO L78 Accepts]: Start accepts. Automaton has 252 states. Word has length 313 [2018-12-03 15:19:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:19:45,333 INFO L225 Difference]: With dead ends: 325 [2018-12-03 15:19:45,333 INFO L226 Difference]: Without dead ends: 323 [2018-12-03 15:19:45,336 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88679 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=38889, Invalid=102863, Unknown=0, NotChecked=0, Total=141752 [2018-12-03 15:19:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-12-03 15:19:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-12-03 15:19:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-03 15:19:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 382 transitions. [2018-12-03 15:19:45,343 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 382 transitions. Word has length 313 [2018-12-03 15:19:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:19:45,343 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 382 transitions. [2018-12-03 15:19:45,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 252 states. [2018-12-03 15:19:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 382 transitions. [2018-12-03 15:19:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-12-03 15:19:45,345 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:19:45,345 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-12-03 15:19:45,345 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:19:45,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:19:45,346 INFO L82 PathProgramCache]: Analyzing trace with hash 642891372, now seen corresponding path program 63 times [2018-12-03 15:19:45,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:19:45,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:45,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:19:45,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:19:45,347 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:19:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:19:51,022 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 15:19:51,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:51,022 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:19:51,022 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:19:51,022 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:19:51,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:19:51,022 INFO 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 15:19:51,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:19:51,034 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:19:51,105 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:19:51,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:19:51,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:20:01,053 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 15:20:01,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:20:13,011 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 15:20:13,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:20:13,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 382 [2018-12-03 15:20:13,032 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:20:13,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 256 states [2018-12-03 15:20:13,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2018-12-03 15:20:13,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40006, Invalid=106300, Unknown=0, NotChecked=0, Total=146306 [2018-12-03 15:20:13,038 INFO L87 Difference]: Start difference. First operand 319 states and 382 transitions. Second operand 256 states. [2018-12-03 15:20:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:20:17,141 INFO L93 Difference]: Finished difference Result 330 states and 395 transitions. [2018-12-03 15:20:17,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-12-03 15:20:17,141 INFO L78 Accepts]: Start accepts. Automaton has 256 states. Word has length 318 [2018-12-03 15:20:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:20:17,143 INFO L225 Difference]: With dead ends: 330 [2018-12-03 15:20:17,143 INFO L226 Difference]: Without dead ends: 328 [2018-12-03 15:20:17,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91912 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=40006, Invalid=106300, Unknown=0, NotChecked=0, Total=146306 [2018-12-03 15:20:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-12-03 15:20:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-12-03 15:20:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-03 15:20:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 388 transitions. [2018-12-03 15:20:17,152 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 388 transitions. Word has length 318 [2018-12-03 15:20:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:20:17,153 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 388 transitions. [2018-12-03 15:20:17,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 256 states. [2018-12-03 15:20:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 388 transitions. [2018-12-03 15:20:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-12-03 15:20:17,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:20:17,154 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-12-03 15:20:17,154 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:20:17,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:20:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1346672928, now seen corresponding path program 64 times [2018-12-03 15:20:17,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:20:17,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:20:17,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:20:17,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:20:17,156 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:20:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:20:23,271 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 15:20:23,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:20:23,271 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:20:23,271 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:20:23,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:20:23,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:20:23,271 INFO 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 15:20:23,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:20:23,281 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:20:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:20:23,358 INFO L273 TraceCheckSpWp]: Computing forward predicates...