java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_exp_cong.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 16:50:27,963 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 16:50:27,964 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 16:50:27,981 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 16:50:27,981 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 16:50:27,982 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 16:50:27,983 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 16:50:27,985 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 16:50:27,986 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 16:50:27,987 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 16:50:27,988 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 16:50:28,025 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_exp_cong.epf [2018-12-03 16:50:28,041 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 16:50:28,041 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 16:50:28,042 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 16:50:28,042 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 16:50:28,043 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 16:50:28,043 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 16:50:28,043 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 16:50:28,043 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 16:50:28,044 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 16:50:28,044 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 16:50:28,044 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 16:50:28,044 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 16:50:28,044 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 16:50:28,045 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 16:50:28,045 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 16:50:28,045 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 16:50:28,046 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 16:50:28,046 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 16:50:28,046 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 16:50:28,046 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 16:50:28,046 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 16:50:28,047 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 16:50:28,047 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 16:50:28,047 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 16:50:28,047 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 16:50:28,047 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 16:50:28,048 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 16:50:28,048 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 16:50:28,048 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 16:50:28,048 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 16:50:28,048 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 16:50:28,049 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 16:50:28,049 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:50:28,049 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 16:50:28,049 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 16:50:28,049 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 16:50:28,050 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 16:50:28,050 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 16:50:28,050 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 16:50:28,050 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 16:50:28,050 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 16:50:28,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 16:50:28,093 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 16:50:28,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 16:50:28,098 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 16:50:28,099 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 16:50:28,100 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl [2018-12-03 16:50:28,100 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl' [2018-12-03 16:50:28,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 16:50:28,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 16:50:28,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 16:50:28,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 16:50:28,130 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 16:50:28,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,163 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 16:50:28,163 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 16:50:28,163 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 16:50:28,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 16:50:28,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 16:50:28,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 16:50:28,166 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 16:50:28,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... [2018-12-03 16:50:28,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 16:50:28,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 16:50:28,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 16:50:28,188 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 16:50:28,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:50:28,260 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-12-03 16:50:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 16:50:28,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 16:50:28,452 INFO L272 CfgBuilder]: Using library mode [2018-12-03 16:50:28,453 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 16:50:28,453 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:50:28 BoogieIcfgContainer [2018-12-03 16:50:28,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 16:50:28,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 16:50:28,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 16:50:28,460 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 16:50:28,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:50:28" (1/2) ... [2018-12-03 16:50:28,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d24898 and model type HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 04:50:28, skipping insertion in model container [2018-12-03 16:50:28,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:50:28" (2/2) ... [2018-12-03 16:50:28,464 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEquality-Safe.bpl [2018-12-03 16:50:28,476 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 16:50:28,484 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 16:50:28,504 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 16:50:28,548 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 16:50:28,548 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 16:50:28,548 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 16:50:28,549 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 16:50:28,549 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 16:50:28,549 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 16:50:28,549 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 16:50:28,549 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 16:50:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-12-03 16:50:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-03 16:50:28,581 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:28,582 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-03 16:50:28,586 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:28,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-12-03 16:50:28,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:28,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:28,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:28,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:28,653 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:28,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:50:28,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-03 16:50:28,828 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:50:28,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 16:50:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 16:50:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:50:28,853 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-12-03 16:50:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:28,951 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 16:50:28,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 16:50:28,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-03 16:50:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:28,962 INFO L225 Difference]: With dead ends: 9 [2018-12-03 16:50:28,963 INFO L226 Difference]: Without dead ends: 4 [2018-12-03 16:50:28,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:50:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-12-03 16:50:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-12-03 16:50:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-03 16:50:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-12-03 16:50:29,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-12-03 16:50:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:29,001 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-12-03 16:50:29,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 16:50:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-12-03 16:50:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 16:50:29,002 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:29,002 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 16:50:29,003 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:29,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-12-03 16:50:29,003 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:29,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:29,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:29,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:29,006 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:29,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:29,130 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:29,131 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-03 16:50:29,133 INFO L205 CegarAbsIntRunner]: [0], [4], [6] [2018-12-03 16:50:29,172 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 16:50:29,173 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 16:50:29,295 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 16:50:29,296 INFO L272 AbstractInterpreter]: Visited 3 different actions 9 times. Merged at 2 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 16:50:29,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:29,340 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 16:50:29,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:29,341 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:29,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:29,352 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:29,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:29,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:29,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:29,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2018-12-03 16:50:29,491 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:29,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 16:50:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 16:50:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 16:50:29,492 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-12-03 16:50:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:29,523 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-12-03 16:50:29,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 16:50:29,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-03 16:50:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:29,524 INFO L225 Difference]: With dead ends: 6 [2018-12-03 16:50:29,524 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 16:50:29,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 16:50:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 16:50:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 16:50:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 16:50:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 16:50:29,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 16:50:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:29,528 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 16:50:29,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 16:50:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 16:50:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 16:50:29,528 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:29,529 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-12-03 16:50:29,529 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:29,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-12-03 16:50:29,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:29,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:29,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:29,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:29,531 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:29,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:29,624 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:29,624 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:29,624 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:29,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:29,625 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:29,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:29,636 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:29,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-03 16:50:29,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:29,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:29,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:29,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:29,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2018-12-03 16:50:29,777 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:29,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 16:50:29,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 16:50:29,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-03 16:50:29,778 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-12-03 16:50:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:29,833 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-12-03 16:50:29,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 16:50:29,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-03 16:50:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:29,834 INFO L225 Difference]: With dead ends: 7 [2018-12-03 16:50:29,834 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 16:50:29,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-03 16:50:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 16:50:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 16:50:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 16:50:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 16:50:29,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 16:50:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:29,838 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 16:50:29,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 16:50:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 16:50:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 16:50:29,838 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:29,839 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-12-03 16:50:29,839 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:29,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:29,839 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-12-03 16:50:29,840 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:29,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:29,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:29,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:29,841 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:29,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:29,983 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:29,983 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:29,984 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:29,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:29,984 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:30,001 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:30,001 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:30,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:30,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:30,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:30,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:30,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:30,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2018-12-03 16:50:30,235 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:30,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 16:50:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 16:50:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 16:50:30,237 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-12-03 16:50:30,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:30,294 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-03 16:50:30,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 16:50:30,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-12-03 16:50:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:30,296 INFO L225 Difference]: With dead ends: 8 [2018-12-03 16:50:30,296 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 16:50:30,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 16:50:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 16:50:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 16:50:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 16:50:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 16:50:30,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-03 16:50:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:30,299 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 16:50:30,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 16:50:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 16:50:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 16:50:30,300 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:30,300 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-12-03 16:50:30,300 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:30,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:30,301 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-12-03 16:50:30,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:30,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:30,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:30,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:30,302 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:30,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:30,430 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:30,430 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:30,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:30,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:30,431 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:30,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:30,447 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:30,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:30,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:30,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:30,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-12-03 16:50:30,640 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:30,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 16:50:30,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 16:50:30,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-03 16:50:30,641 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-12-03 16:50:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:30,659 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 16:50:30,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 16:50:30,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-12-03 16:50:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:30,661 INFO L225 Difference]: With dead ends: 9 [2018-12-03 16:50:30,662 INFO L226 Difference]: Without dead ends: 8 [2018-12-03 16:50:30,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-03 16:50:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-03 16:50:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-03 16:50:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-03 16:50:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-12-03 16:50:30,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-12-03 16:50:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:30,665 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-12-03 16:50:30,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 16:50:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-03 16:50:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-03 16:50:30,666 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:30,666 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-12-03 16:50:30,667 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:30,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:30,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-12-03 16:50:30,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:30,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:30,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:30,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:30,669 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:30,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:30,792 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:30,792 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:30,792 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:30,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:30,793 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:30,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:30,802 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:30,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-03 16:50:30,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:30,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:30,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:31,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:31,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-12-03 16:50:31,322 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:31,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 16:50:31,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 16:50:31,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-03 16:50:31,323 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-12-03 16:50:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:31,357 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-03 16:50:31,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 16:50:31,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-03 16:50:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:31,359 INFO L225 Difference]: With dead ends: 10 [2018-12-03 16:50:31,359 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 16:50:31,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-03 16:50:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 16:50:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 16:50:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 16:50:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-03 16:50:31,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-12-03 16:50:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:31,363 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-03 16:50:31,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 16:50:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-03 16:50:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 16:50:31,364 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:31,364 INFO L402 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-12-03 16:50:31,364 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:31,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:31,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-12-03 16:50:31,365 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:31,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:31,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:31,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:31,366 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:31,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:31,490 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:31,491 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:31,491 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:31,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:31,491 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:31,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:31,501 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:31,509 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:31,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:31,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:31,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:31,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:31,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2018-12-03 16:50:31,671 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:31,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 16:50:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 16:50:31,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-03 16:50:31,672 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-12-03 16:50:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:31,699 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-12-03 16:50:31,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 16:50:31,700 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-12-03 16:50:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:31,700 INFO L225 Difference]: With dead ends: 11 [2018-12-03 16:50:31,700 INFO L226 Difference]: Without dead ends: 10 [2018-12-03 16:50:31,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-03 16:50:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-12-03 16:50:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-12-03 16:50:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-03 16:50:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-12-03 16:50:31,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-12-03 16:50:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:31,704 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-12-03 16:50:31,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 16:50:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-12-03 16:50:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-03 16:50:31,705 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:31,705 INFO L402 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-12-03 16:50:31,705 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:31,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-12-03 16:50:31,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:31,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:31,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:31,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:31,707 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:31,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:31,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:31,841 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:31,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:31,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:31,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:31,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:31,851 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:31,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:31,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:32,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:32,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2018-12-03 16:50:32,165 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:32,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 16:50:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 16:50:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-03 16:50:32,166 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-12-03 16:50:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:32,199 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-12-03 16:50:32,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 16:50:32,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-12-03 16:50:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:32,200 INFO L225 Difference]: With dead ends: 12 [2018-12-03 16:50:32,201 INFO L226 Difference]: Without dead ends: 11 [2018-12-03 16:50:32,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-03 16:50:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-03 16:50:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-12-03 16:50:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-03 16:50:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-12-03 16:50:32,204 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-12-03 16:50:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:32,204 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-12-03 16:50:32,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 16:50:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-12-03 16:50:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-03 16:50:32,205 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:32,205 INFO L402 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-12-03 16:50:32,205 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:32,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-12-03 16:50:32,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:32,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:32,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:32,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:32,207 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:32,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:32,317 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:32,317 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:32,317 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:32,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:32,318 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:32,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:32,327 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:32,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-03 16:50:32,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:32,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:32,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:32,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:32,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2018-12-03 16:50:32,588 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:32,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 16:50:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 16:50:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-03 16:50:32,590 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-12-03 16:50:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:32,616 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-12-03 16:50:32,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 16:50:32,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-12-03 16:50:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:32,617 INFO L225 Difference]: With dead ends: 13 [2018-12-03 16:50:32,618 INFO L226 Difference]: Without dead ends: 12 [2018-12-03 16:50:32,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-03 16:50:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-03 16:50:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-03 16:50:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-03 16:50:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-12-03 16:50:32,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-12-03 16:50:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:32,623 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-12-03 16:50:32,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 16:50:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-12-03 16:50:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-03 16:50:32,623 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:32,624 INFO L402 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-12-03 16:50:32,624 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:32,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:32,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-12-03 16:50:32,624 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:32,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:32,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:32,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:32,625 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:32,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:32,748 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:32,748 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:32,748 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:32,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:32,749 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:32,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:32,758 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:32,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:32,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:32,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:32,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:33,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:33,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2018-12-03 16:50:33,021 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:33,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 16:50:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 16:50:33,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-03 16:50:33,022 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-12-03 16:50:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:33,075 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-12-03 16:50:33,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 16:50:33,075 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-12-03 16:50:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:33,076 INFO L225 Difference]: With dead ends: 14 [2018-12-03 16:50:33,076 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 16:50:33,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-03 16:50:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 16:50:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-03 16:50:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-03 16:50:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-12-03 16:50:33,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-12-03 16:50:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:33,082 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-12-03 16:50:33,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 16:50:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-12-03 16:50:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-03 16:50:33,082 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:33,083 INFO L402 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-12-03 16:50:33,083 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:33,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-12-03 16:50:33,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:33,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:33,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:33,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:33,086 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:33,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:33,251 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:33,251 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:33,251 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:33,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:33,252 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:33,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:33,261 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:33,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:33,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:33,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:33,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2018-12-03 16:50:33,711 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:33,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 16:50:33,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 16:50:33,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-03 16:50:33,712 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-12-03 16:50:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:33,735 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-12-03 16:50:33,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 16:50:33,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-12-03 16:50:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:33,737 INFO L225 Difference]: With dead ends: 15 [2018-12-03 16:50:33,737 INFO L226 Difference]: Without dead ends: 14 [2018-12-03 16:50:33,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-03 16:50:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-03 16:50:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-03 16:50:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 16:50:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-12-03 16:50:33,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-12-03 16:50:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:33,743 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-12-03 16:50:33,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 16:50:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-12-03 16:50:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 16:50:33,744 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:33,744 INFO L402 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-12-03 16:50:33,744 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:33,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:33,744 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-12-03 16:50:33,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:33,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:33,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:33,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:33,745 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:33,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:33,997 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:33,997 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:33,997 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:33,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:33,998 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:34,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:34,024 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:34,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-03 16:50:34,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:34,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:34,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:34,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:34,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2018-12-03 16:50:34,621 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:34,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 16:50:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 16:50:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-03 16:50:34,622 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-12-03 16:50:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:34,659 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-12-03 16:50:34,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 16:50:34,659 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-12-03 16:50:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:34,660 INFO L225 Difference]: With dead ends: 16 [2018-12-03 16:50:34,660 INFO L226 Difference]: Without dead ends: 15 [2018-12-03 16:50:34,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-03 16:50:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-03 16:50:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-03 16:50:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-03 16:50:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-03 16:50:34,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-12-03 16:50:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:34,663 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-03 16:50:34,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 16:50:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-03 16:50:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 16:50:34,663 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:34,664 INFO L402 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-12-03 16:50:34,664 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:34,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:34,664 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-12-03 16:50:34,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:34,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:34,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:34,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:34,665 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:34,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:34,796 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:34,797 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:34,797 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:34,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:34,798 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:34,807 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:34,807 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:34,821 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:34,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:34,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:34,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:35,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:35,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2018-12-03 16:50:35,192 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:35,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 16:50:35,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 16:50:35,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-03 16:50:35,197 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-12-03 16:50:35,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:35,267 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-12-03 16:50:35,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 16:50:35,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-12-03 16:50:35,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:35,268 INFO L225 Difference]: With dead ends: 17 [2018-12-03 16:50:35,268 INFO L226 Difference]: Without dead ends: 16 [2018-12-03 16:50:35,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-03 16:50:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-03 16:50:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-03 16:50:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-03 16:50:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-03 16:50:35,272 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-12-03 16:50:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:35,272 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-03 16:50:35,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 16:50:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-03 16:50:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-03 16:50:35,273 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:35,273 INFO L402 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-12-03 16:50:35,273 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:35,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:35,274 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-12-03 16:50:35,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:35,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:35,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:35,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:35,275 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:35,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:35,645 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:35,645 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:35,645 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:35,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:35,646 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:35,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:35,656 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:35,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:35,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:36,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:36,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2018-12-03 16:50:36,141 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:36,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 16:50:36,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 16:50:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-03 16:50:36,142 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-12-03 16:50:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:36,342 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-12-03 16:50:36,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 16:50:36,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-12-03 16:50:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:36,343 INFO L225 Difference]: With dead ends: 18 [2018-12-03 16:50:36,343 INFO L226 Difference]: Without dead ends: 17 [2018-12-03 16:50:36,344 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-03 16:50:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-03 16:50:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-03 16:50:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-03 16:50:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-03 16:50:36,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-12-03 16:50:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:36,348 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-03 16:50:36,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 16:50:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-03 16:50:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-03 16:50:36,350 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:36,350 INFO L402 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-12-03 16:50:36,350 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:36,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-12-03 16:50:36,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:36,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:36,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:36,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:36,352 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:36,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:36,582 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:36,582 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:36,582 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:36,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:36,582 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:36,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:36,591 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:36,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-12-03 16:50:36,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:36,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:36,617 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:37,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:37,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2018-12-03 16:50:37,058 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:37,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 16:50:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 16:50:37,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-03 16:50:37,059 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-12-03 16:50:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:37,085 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-12-03 16:50:37,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 16:50:37,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-12-03 16:50:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:37,086 INFO L225 Difference]: With dead ends: 19 [2018-12-03 16:50:37,087 INFO L226 Difference]: Without dead ends: 18 [2018-12-03 16:50:37,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-03 16:50:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-03 16:50:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-03 16:50:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-03 16:50:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-12-03 16:50:37,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-12-03 16:50:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:37,091 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-12-03 16:50:37,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 16:50:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-12-03 16:50:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-03 16:50:37,092 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:37,092 INFO L402 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-12-03 16:50:37,093 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:37,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:37,093 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-12-03 16:50:37,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:37,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:37,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:37,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:37,094 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:37,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:37,342 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:37,343 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:37,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:37,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:37,343 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:37,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:37,356 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:37,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:37,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:37,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:37,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:38,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:38,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2018-12-03 16:50:38,021 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:38,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-03 16:50:38,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-03 16:50:38,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 16:50:38,022 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-12-03 16:50:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:38,063 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-12-03 16:50:38,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-03 16:50:38,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-12-03 16:50:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:38,068 INFO L225 Difference]: With dead ends: 20 [2018-12-03 16:50:38,069 INFO L226 Difference]: Without dead ends: 19 [2018-12-03 16:50:38,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 16:50:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-03 16:50:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-03 16:50:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 16:50:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-12-03 16:50:38,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-12-03 16:50:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:38,072 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-12-03 16:50:38,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-03 16:50:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-12-03 16:50:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 16:50:38,073 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:38,073 INFO L402 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-12-03 16:50:38,074 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:38,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-12-03 16:50:38,074 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:38,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:38,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:38,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:38,075 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:38,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:38,883 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:38,883 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:38,884 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:38,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:38,884 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:38,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:38,894 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:38,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:38,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:39,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:39,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2018-12-03 16:50:39,741 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:39,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-03 16:50:39,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-03 16:50:39,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 16:50:39,743 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-12-03 16:50:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:39,767 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-12-03 16:50:39,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 16:50:39,768 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-12-03 16:50:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:39,769 INFO L225 Difference]: With dead ends: 21 [2018-12-03 16:50:39,769 INFO L226 Difference]: Without dead ends: 20 [2018-12-03 16:50:39,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 16:50:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-03 16:50:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-03 16:50:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-03 16:50:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-12-03 16:50:39,774 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-12-03 16:50:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:39,774 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-12-03 16:50:39,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-03 16:50:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-12-03 16:50:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-03 16:50:39,775 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:39,775 INFO L402 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-12-03 16:50:39,775 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:39,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-12-03 16:50:39,775 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:39,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:39,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:39,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:39,776 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:40,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:40,153 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:40,154 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:40,154 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:40,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:40,154 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:40,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:40,170 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:40,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-03 16:50:40,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:40,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:40,206 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:41,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:41,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2018-12-03 16:50:41,120 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:41,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 16:50:41,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 16:50:41,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 16:50:41,122 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-12-03 16:50:41,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:41,171 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-12-03 16:50:41,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 16:50:41,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-12-03 16:50:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:41,172 INFO L225 Difference]: With dead ends: 22 [2018-12-03 16:50:41,172 INFO L226 Difference]: Without dead ends: 21 [2018-12-03 16:50:41,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 16:50:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-03 16:50:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-03 16:50:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-03 16:50:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-12-03 16:50:41,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-12-03 16:50:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:41,176 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-12-03 16:50:41,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 16:50:41,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-12-03 16:50:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 16:50:41,177 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:41,177 INFO L402 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-12-03 16:50:41,177 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:41,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:41,178 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-12-03 16:50:41,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:41,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:41,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:41,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:41,179 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:41,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:41,895 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:41,895 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:41,895 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:41,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:41,896 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:41,904 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:41,904 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:41,915 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:41,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:41,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:41,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:42,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:42,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2018-12-03 16:50:42,434 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:42,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-03 16:50:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-03 16:50:42,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-03 16:50:42,436 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-12-03 16:50:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:42,463 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-03 16:50:42,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 16:50:42,464 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-12-03 16:50:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:42,465 INFO L225 Difference]: With dead ends: 23 [2018-12-03 16:50:42,465 INFO L226 Difference]: Without dead ends: 22 [2018-12-03 16:50:42,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-03 16:50:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-03 16:50:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-03 16:50:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-03 16:50:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-12-03 16:50:42,469 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-12-03 16:50:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:42,469 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-12-03 16:50:42,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-03 16:50:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-12-03 16:50:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-03 16:50:42,470 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:42,470 INFO L402 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-12-03 16:50:42,470 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:42,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-12-03 16:50:42,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:42,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:42,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:42,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:42,472 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:42,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:42,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:42,753 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:42,753 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:42,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:42,754 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:42,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:42,763 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:42,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:42,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:43,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:43,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2018-12-03 16:50:43,594 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:43,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 16:50:43,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 16:50:43,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-03 16:50:43,595 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-12-03 16:50:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:43,637 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-12-03 16:50:43,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-03 16:50:43,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-12-03 16:50:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:43,639 INFO L225 Difference]: With dead ends: 24 [2018-12-03 16:50:43,639 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 16:50:43,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-03 16:50:43,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 16:50:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-03 16:50:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-03 16:50:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-12-03 16:50:43,645 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-12-03 16:50:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:43,645 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-12-03 16:50:43,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 16:50:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-12-03 16:50:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-03 16:50:43,646 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:43,646 INFO L402 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-12-03 16:50:43,646 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:43,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:43,647 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-12-03 16:50:43,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:43,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:43,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:43,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:43,648 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:43,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:43,942 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:43,943 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:43,943 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:43,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:43,943 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:43,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:43,954 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:43,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-12-03 16:50:43,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:43,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:43,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:44,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:44,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2018-12-03 16:50:44,489 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:44,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-03 16:50:44,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-03 16:50:44,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 16:50:44,491 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-12-03 16:50:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:44,567 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-12-03 16:50:44,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 16:50:44,567 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-12-03 16:50:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:44,568 INFO L225 Difference]: With dead ends: 25 [2018-12-03 16:50:44,568 INFO L226 Difference]: Without dead ends: 24 [2018-12-03 16:50:44,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 16:50:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-03 16:50:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-03 16:50:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 16:50:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-12-03 16:50:44,572 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-12-03 16:50:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:44,572 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-12-03 16:50:44,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-03 16:50:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-12-03 16:50:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 16:50:44,573 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:44,573 INFO L402 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-12-03 16:50:44,573 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:44,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-12-03 16:50:44,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:44,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:44,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:44,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:44,575 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:45,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:45,025 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:45,025 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:45,026 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:45,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:45,026 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:45,035 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:45,035 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:45,046 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:45,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:45,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:45,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:45,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:45,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2018-12-03 16:50:45,735 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:45,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 16:50:45,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 16:50:45,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-03 16:50:45,736 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-12-03 16:50:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:45,810 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-03 16:50:45,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-03 16:50:45,811 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-12-03 16:50:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:45,812 INFO L225 Difference]: With dead ends: 26 [2018-12-03 16:50:45,812 INFO L226 Difference]: Without dead ends: 25 [2018-12-03 16:50:45,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-03 16:50:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-03 16:50:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-03 16:50:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-03 16:50:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-12-03 16:50:45,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-12-03 16:50:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:45,817 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-12-03 16:50:45,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 16:50:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-12-03 16:50:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-03 16:50:45,817 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:45,818 INFO L402 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-12-03 16:50:45,818 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:45,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-12-03 16:50:45,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:45,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:45,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:45,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:45,819 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:46,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:46,079 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:46,079 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:46,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:46,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:46,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:46,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:46,089 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:46,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:46,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:46,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:46,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2018-12-03 16:50:46,693 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:46,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-03 16:50:46,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-03 16:50:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-03 16:50:46,695 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-12-03 16:50:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:46,730 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-12-03 16:50:46,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 16:50:46,731 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-12-03 16:50:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:46,731 INFO L225 Difference]: With dead ends: 27 [2018-12-03 16:50:46,731 INFO L226 Difference]: Without dead ends: 26 [2018-12-03 16:50:46,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-03 16:50:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-03 16:50:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-03 16:50:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-03 16:50:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-12-03 16:50:46,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-12-03 16:50:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:46,738 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-12-03 16:50:46,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-03 16:50:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-12-03 16:50:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-03 16:50:46,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:46,738 INFO L402 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-12-03 16:50:46,739 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:46,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:46,739 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-12-03 16:50:46,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:46,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:46,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:46,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:46,740 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:47,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:47,064 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:47,064 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:47,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:47,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:47,064 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:47,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:47,075 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:47,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-12-03 16:50:47,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:47,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:47,150 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:48,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:48,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2018-12-03 16:50:48,122 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:48,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-03 16:50:48,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-03 16:50:48,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 16:50:48,123 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-12-03 16:50:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:48,167 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-12-03 16:50:48,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-03 16:50:48,167 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-12-03 16:50:48,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:48,168 INFO L225 Difference]: With dead ends: 28 [2018-12-03 16:50:48,168 INFO L226 Difference]: Without dead ends: 27 [2018-12-03 16:50:48,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 16:50:48,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-03 16:50:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-03 16:50:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-03 16:50:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-03 16:50:48,173 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-12-03 16:50:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:48,173 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-03 16:50:48,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-03 16:50:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-03 16:50:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-03 16:50:48,174 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:48,174 INFO L402 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-12-03 16:50:48,175 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:48,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-12-03 16:50:48,175 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:48,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:48,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:48,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:48,176 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:48,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:48,674 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:48,674 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:48,674 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:48,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:48,674 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:48,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:48,684 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:48,699 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:48,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:48,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:48,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:49,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:49,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2018-12-03 16:50:49,460 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:49,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-03 16:50:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-03 16:50:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 16:50:49,461 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-12-03 16:50:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:49,516 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-12-03 16:50:49,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 16:50:49,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-12-03 16:50:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:49,517 INFO L225 Difference]: With dead ends: 29 [2018-12-03 16:50:49,517 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 16:50:49,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 16:50:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 16:50:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-03 16:50:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-03 16:50:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-12-03 16:50:49,522 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-12-03 16:50:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:49,522 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-12-03 16:50:49,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-03 16:50:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-12-03 16:50:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-03 16:50:49,523 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:49,523 INFO L402 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-12-03 16:50:49,524 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:49,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:49,524 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-12-03 16:50:49,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:49,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:49,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:49,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:49,525 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:50,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:50,075 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:50,075 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:50,075 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:50,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:50,075 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:50,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:50,083 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:50,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:50,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:50,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:50,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2018-12-03 16:50:50,820 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:50,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 16:50:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 16:50:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-03 16:50:50,822 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-12-03 16:50:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:50,883 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-12-03 16:50:50,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-03 16:50:50,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-12-03 16:50:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:50,884 INFO L225 Difference]: With dead ends: 30 [2018-12-03 16:50:50,884 INFO L226 Difference]: Without dead ends: 29 [2018-12-03 16:50:50,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-03 16:50:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-03 16:50:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-03 16:50:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 16:50:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-12-03 16:50:50,889 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-12-03 16:50:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:50,889 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-12-03 16:50:50,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 16:50:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-12-03 16:50:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 16:50:50,890 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:50,890 INFO L402 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-12-03 16:50:50,890 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:50,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-12-03 16:50:50,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:50,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:50,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:50,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:50,892 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:51,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:51,297 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:51,297 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:51,298 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:51,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:51,298 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:51,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:51,306 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:51,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-12-03 16:50:51,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:51,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:51,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:52,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:52,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2018-12-03 16:50:52,553 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:52,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-03 16:50:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-03 16:50:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 16:50:52,555 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-12-03 16:50:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:52,596 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-12-03 16:50:52,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 16:50:52,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-12-03 16:50:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:52,597 INFO L225 Difference]: With dead ends: 31 [2018-12-03 16:50:52,598 INFO L226 Difference]: Without dead ends: 30 [2018-12-03 16:50:52,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 16:50:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-03 16:50:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-03 16:50:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 16:50:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-12-03 16:50:52,602 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-12-03 16:50:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:52,603 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-12-03 16:50:52,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-03 16:50:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-12-03 16:50:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-03 16:50:52,603 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:52,604 INFO L402 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-12-03 16:50:52,604 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:52,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-12-03 16:50:52,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:52,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:52,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:52,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:52,605 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:53,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:53,598 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:53,598 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:53,598 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:53,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:53,598 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:53,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:53,608 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:53,625 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:53,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:53,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:53,636 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:54,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:54,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2018-12-03 16:50:54,507 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:54,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-03 16:50:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-03 16:50:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-12-03 16:50:54,510 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-12-03 16:50:54,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:54,748 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-12-03 16:50:54,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-03 16:50:54,748 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-12-03 16:50:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:54,749 INFO L225 Difference]: With dead ends: 32 [2018-12-03 16:50:54,749 INFO L226 Difference]: Without dead ends: 31 [2018-12-03 16:50:54,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-12-03 16:50:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-03 16:50:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-03 16:50:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-03 16:50:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-12-03 16:50:54,752 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-12-03 16:50:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:54,753 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-12-03 16:50:54,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-03 16:50:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-12-03 16:50:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-03 16:50:54,753 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:54,753 INFO L402 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-12-03 16:50:54,754 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:54,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:54,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-12-03 16:50:54,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:54,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:54,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:54,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:54,755 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:55,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:55,310 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:55,310 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:55,310 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:55,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:55,310 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:55,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:55,320 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:50:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:55,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:55,357 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:56,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:56,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2018-12-03 16:50:56,289 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:56,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-03 16:50:56,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-03 16:50:56,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-12-03 16:50:56,290 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-12-03 16:50:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:56,349 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-12-03 16:50:56,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 16:50:56,350 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-12-03 16:50:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:56,351 INFO L225 Difference]: With dead ends: 33 [2018-12-03 16:50:56,351 INFO L226 Difference]: Without dead ends: 32 [2018-12-03 16:50:56,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-12-03 16:50:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-03 16:50:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-03 16:50:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-03 16:50:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-12-03 16:50:56,358 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-12-03 16:50:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:56,358 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-12-03 16:50:56,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-03 16:50:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-12-03 16:50:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-03 16:50:56,359 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:56,359 INFO L402 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-12-03 16:50:56,359 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:56,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:56,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-12-03 16:50:56,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:56,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:56,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:50:56,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:56,360 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:56,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:56,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:56,767 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:56,767 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:56,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:56,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:56,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:50:56,776 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:50:56,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-03 16:50:56,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:56,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:56,810 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:50:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:57,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:50:57,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2018-12-03 16:50:57,813 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:50:57,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 16:50:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 16:50:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 16:50:57,815 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-12-03 16:50:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:50:57,856 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-12-03 16:50:57,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-03 16:50:57,856 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-12-03 16:50:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:50:57,857 INFO L225 Difference]: With dead ends: 34 [2018-12-03 16:50:57,857 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 16:50:57,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 16:50:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 16:50:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-03 16:50:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-03 16:50:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-03 16:50:57,862 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-12-03 16:50:57,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:50:57,862 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-03 16:50:57,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 16:50:57,863 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-03 16:50:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-03 16:50:57,863 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:50:57,863 INFO L402 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-12-03 16:50:57,864 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:50:57,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:50:57,864 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-12-03 16:50:57,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:50:57,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:57,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:50:57,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:50:57,865 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:50:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:50:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:59,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:59,113 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:50:59,113 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:50:59,114 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:50:59,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:50:59,114 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:50:59,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:50:59,132 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:50:59,149 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:50:59,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:50:59,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:50:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:50:59,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:00,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:00,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 62 [2018-12-03 16:51:00,572 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:00,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-03 16:51:00,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-03 16:51:00,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-12-03 16:51:00,573 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-12-03 16:51:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:00,660 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-12-03 16:51:00,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 16:51:00,660 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-12-03 16:51:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:00,661 INFO L225 Difference]: With dead ends: 35 [2018-12-03 16:51:00,661 INFO L226 Difference]: Without dead ends: 34 [2018-12-03 16:51:00,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-12-03 16:51:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-03 16:51:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-12-03 16:51:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 16:51:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-12-03 16:51:00,664 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-12-03 16:51:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:00,665 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-12-03 16:51:00,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-03 16:51:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-12-03 16:51:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 16:51:00,665 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:00,665 INFO L402 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-12-03 16:51:00,666 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:00,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:00,666 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-12-03 16:51:00,666 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:00,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:00,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:00,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:00,667 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:01,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:01,198 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:01,198 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:01,198 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:01,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:01,198 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:01,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:01,209 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:51:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:01,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:01,235 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:02,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:02,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2018-12-03 16:51:02,313 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:02,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-03 16:51:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-03 16:51:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-12-03 16:51:02,314 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-12-03 16:51:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:02,401 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-12-03 16:51:02,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-03 16:51:02,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-12-03 16:51:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:02,402 INFO L225 Difference]: With dead ends: 36 [2018-12-03 16:51:02,402 INFO L226 Difference]: Without dead ends: 35 [2018-12-03 16:51:02,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-12-03 16:51:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-03 16:51:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-03 16:51:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-03 16:51:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-12-03 16:51:02,407 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-12-03 16:51:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:02,407 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-12-03 16:51:02,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-03 16:51:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-12-03 16:51:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-03 16:51:02,408 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:02,408 INFO L402 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-12-03 16:51:02,408 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:02,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-12-03 16:51:02,408 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:02,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:02,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:02,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:02,409 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:02,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:02,855 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:02,856 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:02,856 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:02,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:02,856 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:02,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:51:02,865 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:51:02,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-12-03 16:51:02,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:02,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:02,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:04,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:04,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2018-12-03 16:51:04,179 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:04,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-03 16:51:04,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-03 16:51:04,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 16:51:04,180 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-12-03 16:51:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:04,246 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-12-03 16:51:04,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 16:51:04,247 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-12-03 16:51:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:04,247 INFO L225 Difference]: With dead ends: 37 [2018-12-03 16:51:04,248 INFO L226 Difference]: Without dead ends: 36 [2018-12-03 16:51:04,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 16:51:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-03 16:51:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-03 16:51:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-03 16:51:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-12-03 16:51:04,252 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-12-03 16:51:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:04,252 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-12-03 16:51:04,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-03 16:51:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-12-03 16:51:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-03 16:51:04,253 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:04,253 INFO L402 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-12-03 16:51:04,253 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:04,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:04,254 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-12-03 16:51:04,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:04,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:04,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:04,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:04,255 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:04,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:04,879 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:04,879 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:04,879 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:04,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:04,879 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:04,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:51:04,890 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:51:04,913 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:51:04,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:04,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:04,923 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:06,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:06,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2018-12-03 16:51:06,425 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:06,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 16:51:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 16:51:06,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-12-03 16:51:06,426 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-12-03 16:51:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:06,524 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-12-03 16:51:06,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-03 16:51:06,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-12-03 16:51:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:06,525 INFO L225 Difference]: With dead ends: 38 [2018-12-03 16:51:06,525 INFO L226 Difference]: Without dead ends: 37 [2018-12-03 16:51:06,526 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-12-03 16:51:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-03 16:51:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-12-03 16:51:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-03 16:51:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-12-03 16:51:06,529 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-12-03 16:51:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:06,529 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-12-03 16:51:06,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 16:51:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-12-03 16:51:06,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 16:51:06,530 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:06,530 INFO L402 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-12-03 16:51:06,530 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:06,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:06,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-12-03 16:51:06,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:06,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:06,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:06,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:06,532 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:07,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:07,079 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:07,079 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:07,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:07,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:07,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:07,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:07,089 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:51:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:07,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:07,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:08,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:08,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2018-12-03 16:51:08,392 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:08,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-03 16:51:08,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-03 16:51:08,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-12-03 16:51:08,394 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-12-03 16:51:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:08,437 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-12-03 16:51:08,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 16:51:08,438 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-12-03 16:51:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:08,439 INFO L225 Difference]: With dead ends: 39 [2018-12-03 16:51:08,439 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 16:51:08,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-12-03 16:51:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 16:51:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-03 16:51:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-03 16:51:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-12-03 16:51:08,443 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-12-03 16:51:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:08,443 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-12-03 16:51:08,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-03 16:51:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-12-03 16:51:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-03 16:51:08,444 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:08,444 INFO L402 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-12-03 16:51:08,444 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:08,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-12-03 16:51:08,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:08,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:08,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:08,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:08,445 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:09,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:09,192 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:09,192 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:09,192 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:09,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:09,192 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:09,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:51:09,200 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:51:09,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-12-03 16:51:09,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:09,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:09,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:10,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:10,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 72 [2018-12-03 16:51:10,990 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:10,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-03 16:51:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-03 16:51:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 16:51:10,991 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-12-03 16:51:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:11,049 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-12-03 16:51:11,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-03 16:51:11,050 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-12-03 16:51:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:11,050 INFO L225 Difference]: With dead ends: 40 [2018-12-03 16:51:11,050 INFO L226 Difference]: Without dead ends: 39 [2018-12-03 16:51:11,051 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 16:51:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-03 16:51:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-03 16:51:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 16:51:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-12-03 16:51:11,054 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-12-03 16:51:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:11,054 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-12-03 16:51:11,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-03 16:51:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-12-03 16:51:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 16:51:11,055 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:11,055 INFO L402 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-12-03 16:51:11,055 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:11,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:11,056 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-12-03 16:51:11,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:11,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:11,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:11,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:11,057 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:11,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:11,661 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:11,661 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:11,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:11,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:11,662 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:11,671 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:51:11,671 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:51:11,689 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:51:11,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:11,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:11,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:13,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:13,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 74 [2018-12-03 16:51:13,129 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:13,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-03 16:51:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-03 16:51:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-12-03 16:51:13,131 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-12-03 16:51:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:13,187 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-12-03 16:51:13,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 16:51:13,188 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-12-03 16:51:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:13,188 INFO L225 Difference]: With dead ends: 41 [2018-12-03 16:51:13,188 INFO L226 Difference]: Without dead ends: 40 [2018-12-03 16:51:13,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-12-03 16:51:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-03 16:51:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-12-03 16:51:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-03 16:51:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-12-03 16:51:13,192 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-12-03 16:51:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:13,192 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-12-03 16:51:13,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-03 16:51:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-12-03 16:51:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-03 16:51:13,193 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:13,193 INFO L402 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-12-03 16:51:13,193 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:13,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-12-03 16:51:13,194 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:13,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:13,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:13,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:13,195 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:13,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:13,827 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:13,828 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:13,828 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:13,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:13,828 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:13,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:13,837 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:51:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:13,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:13,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:16,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:16,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2018-12-03 16:51:16,058 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:16,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 16:51:16,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 16:51:16,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-12-03 16:51:16,059 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-12-03 16:51:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:16,142 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-12-03 16:51:16,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-03 16:51:16,142 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-12-03 16:51:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:16,143 INFO L225 Difference]: With dead ends: 42 [2018-12-03 16:51:16,143 INFO L226 Difference]: Without dead ends: 41 [2018-12-03 16:51:16,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-12-03 16:51:16,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-03 16:51:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-03 16:51:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-03 16:51:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-12-03 16:51:16,146 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-12-03 16:51:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:16,147 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-12-03 16:51:16,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 16:51:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-12-03 16:51:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-03 16:51:16,147 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:16,147 INFO L402 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-12-03 16:51:16,147 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:16,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-12-03 16:51:16,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:16,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:16,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:16,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:16,148 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:16,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:16,729 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:16,730 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:16,730 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:16,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:16,730 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:16,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:51:16,739 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:51:16,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-12-03 16:51:16,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:16,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:16,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:18,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:18,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 78 [2018-12-03 16:51:18,365 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:18,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-03 16:51:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-03 16:51:18,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 16:51:18,367 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-12-03 16:51:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:18,418 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-12-03 16:51:18,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 16:51:18,418 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-12-03 16:51:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:18,419 INFO L225 Difference]: With dead ends: 43 [2018-12-03 16:51:18,419 INFO L226 Difference]: Without dead ends: 42 [2018-12-03 16:51:18,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 16:51:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-03 16:51:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-03 16:51:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-03 16:51:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-12-03 16:51:18,423 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-12-03 16:51:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:18,423 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-12-03 16:51:18,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-03 16:51:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-12-03 16:51:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-03 16:51:18,424 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:18,424 INFO L402 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-12-03 16:51:18,424 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:18,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:18,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-12-03 16:51:18,424 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:18,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:18,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:18,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:18,425 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:19,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:19,076 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:19,077 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:19,077 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:19,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:19,077 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:19,087 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:51:19,087 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:51:19,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:51:19,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:19,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:19,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:21,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:21,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2018-12-03 16:51:21,248 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:21,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-03 16:51:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-03 16:51:21,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-12-03 16:51:21,249 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-12-03 16:51:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:21,312 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-12-03 16:51:21,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-03 16:51:21,313 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-12-03 16:51:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:21,314 INFO L225 Difference]: With dead ends: 44 [2018-12-03 16:51:21,314 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 16:51:21,315 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-12-03 16:51:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 16:51:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-03 16:51:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-03 16:51:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-12-03 16:51:21,318 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-12-03 16:51:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:21,318 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-12-03 16:51:21,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-03 16:51:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-12-03 16:51:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 16:51:21,318 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:21,319 INFO L402 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-12-03 16:51:21,319 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:21,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-12-03 16:51:21,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:21,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:21,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:21,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:21,320 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:22,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:22,064 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:22,064 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:22,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:22,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:22,064 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:22,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:22,073 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:51:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:22,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:22,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:23,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:23,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 82 [2018-12-03 16:51:23,848 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:23,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-03 16:51:23,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-03 16:51:23,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-12-03 16:51:23,850 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-12-03 16:51:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:23,931 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-12-03 16:51:23,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 16:51:23,931 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-12-03 16:51:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:23,932 INFO L225 Difference]: With dead ends: 45 [2018-12-03 16:51:23,932 INFO L226 Difference]: Without dead ends: 44 [2018-12-03 16:51:23,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-12-03 16:51:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-03 16:51:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-03 16:51:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 16:51:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-12-03 16:51:23,936 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-12-03 16:51:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:23,936 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-12-03 16:51:23,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-03 16:51:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-12-03 16:51:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 16:51:23,937 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:23,937 INFO L402 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-12-03 16:51:23,937 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:23,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-12-03 16:51:23,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:23,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:23,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:23,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:23,938 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:24,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:24,714 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:24,715 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:24,715 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:24,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:24,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:24,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:51:24,725 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:51:24,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-12-03 16:51:24,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:24,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:24,770 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:26,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:26,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 84 [2018-12-03 16:51:26,833 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:26,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 16:51:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 16:51:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 16:51:26,834 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-12-03 16:51:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:26,885 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-12-03 16:51:26,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-03 16:51:26,886 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-12-03 16:51:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:26,886 INFO L225 Difference]: With dead ends: 46 [2018-12-03 16:51:26,886 INFO L226 Difference]: Without dead ends: 45 [2018-12-03 16:51:26,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 16:51:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-03 16:51:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-03 16:51:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-03 16:51:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-12-03 16:51:26,889 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-12-03 16:51:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:26,890 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-12-03 16:51:26,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 16:51:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-12-03 16:51:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-03 16:51:26,890 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:26,890 INFO L402 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-12-03 16:51:26,890 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:26,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:26,891 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-12-03 16:51:26,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:26,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:26,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:26,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:26,892 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:27,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:27,685 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:27,685 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:27,685 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:27,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:27,685 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:27,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:51:27,694 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:51:27,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:51:27,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:27,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:27,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:29,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:29,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 86 [2018-12-03 16:51:29,691 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:29,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-03 16:51:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-03 16:51:29,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-12-03 16:51:29,693 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-12-03 16:51:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:29,747 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-12-03 16:51:29,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 16:51:29,747 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-12-03 16:51:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:29,748 INFO L225 Difference]: With dead ends: 47 [2018-12-03 16:51:29,748 INFO L226 Difference]: Without dead ends: 46 [2018-12-03 16:51:29,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-12-03 16:51:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-03 16:51:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-12-03 16:51:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-03 16:51:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-12-03 16:51:29,752 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-12-03 16:51:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:29,752 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-12-03 16:51:29,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-03 16:51:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-12-03 16:51:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-03 16:51:29,752 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:29,753 INFO L402 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-12-03 16:51:29,753 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:29,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-12-03 16:51:29,753 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:29,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:29,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:29,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:29,754 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:31,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:31,009 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:31,009 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:31,009 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:31,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:31,009 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:31,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:31,018 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:51:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:31,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:31,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:33,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:33,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 88 [2018-12-03 16:51:33,020 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:33,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-03 16:51:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-03 16:51:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-12-03 16:51:33,022 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-12-03 16:51:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:33,089 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-12-03 16:51:33,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-03 16:51:33,089 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-12-03 16:51:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:33,090 INFO L225 Difference]: With dead ends: 48 [2018-12-03 16:51:33,090 INFO L226 Difference]: Without dead ends: 47 [2018-12-03 16:51:33,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-12-03 16:51:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-03 16:51:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-03 16:51:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-03 16:51:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-12-03 16:51:33,093 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-12-03 16:51:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:33,094 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-12-03 16:51:33,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-03 16:51:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-12-03 16:51:33,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-03 16:51:33,094 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:33,095 INFO L402 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-12-03 16:51:33,095 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:33,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:33,095 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-12-03 16:51:33,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:33,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:33,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:33,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:33,096 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:33,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:33,877 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:33,877 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:33,877 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:33,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:33,878 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:33,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:51:33,888 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:51:33,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-12-03 16:51:33,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:33,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:33,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:36,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:36,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 90 [2018-12-03 16:51:36,331 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:36,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-03 16:51:36,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-03 16:51:36,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 16:51:36,332 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-12-03 16:51:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:36,402 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-12-03 16:51:36,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 16:51:36,403 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-12-03 16:51:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:36,404 INFO L225 Difference]: With dead ends: 49 [2018-12-03 16:51:36,404 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 16:51:36,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 16:51:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 16:51:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-03 16:51:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-03 16:51:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-12-03 16:51:36,407 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-12-03 16:51:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:36,407 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-12-03 16:51:36,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-03 16:51:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-12-03 16:51:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-12-03 16:51:36,408 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:36,408 INFO L402 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-12-03 16:51:36,408 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:36,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:36,408 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-12-03 16:51:36,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:36,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:36,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:36,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:36,409 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:37,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:37,330 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:37,330 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:37,330 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:37,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:37,330 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:37,340 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:51:37,340 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:51:37,368 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:51:37,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:37,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:37,381 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:39,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:39,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 92 [2018-12-03 16:51:39,567 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:39,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 16:51:39,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 16:51:39,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-12-03 16:51:39,568 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-12-03 16:51:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:39,927 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-12-03 16:51:39,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-03 16:51:39,927 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-12-03 16:51:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:39,928 INFO L225 Difference]: With dead ends: 50 [2018-12-03 16:51:39,928 INFO L226 Difference]: Without dead ends: 49 [2018-12-03 16:51:39,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-12-03 16:51:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-03 16:51:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-12-03 16:51:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 16:51:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-12-03 16:51:39,932 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-12-03 16:51:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:39,932 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-12-03 16:51:39,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 16:51:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-12-03 16:51:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 16:51:39,933 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:39,933 INFO L402 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-12-03 16:51:39,933 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:39,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-12-03 16:51:39,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:39,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:39,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:39,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:39,934 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:41,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:41,202 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:41,203 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:41,203 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:41,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:41,203 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:41,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:41,211 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:51:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:41,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:41,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:43,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:43,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2018-12-03 16:51:43,729 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:43,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-12-03 16:51:43,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-12-03 16:51:43,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-12-03 16:51:43,730 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-12-03 16:51:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:43,803 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-12-03 16:51:43,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 16:51:43,804 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-12-03 16:51:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:43,804 INFO L225 Difference]: With dead ends: 51 [2018-12-03 16:51:43,804 INFO L226 Difference]: Without dead ends: 50 [2018-12-03 16:51:43,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-12-03 16:51:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-03 16:51:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-12-03 16:51:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-03 16:51:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-12-03 16:51:43,808 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-12-03 16:51:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:43,808 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-12-03 16:51:43,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-12-03 16:51:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-12-03 16:51:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-03 16:51:43,809 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:43,809 INFO L402 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-12-03 16:51:43,809 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:43,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-12-03 16:51:43,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:43,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:43,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:43,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:43,810 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:44,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:44,698 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:44,698 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:44,698 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:44,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:44,699 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:44,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:51:44,709 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:51:44,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-12-03 16:51:44,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:44,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:44,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:47,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:47,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2018-12-03 16:51:47,553 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:47,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-03 16:51:47,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-03 16:51:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 16:51:47,555 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-12-03 16:51:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:47,617 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-12-03 16:51:47,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-03 16:51:47,618 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-12-03 16:51:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:47,619 INFO L225 Difference]: With dead ends: 52 [2018-12-03 16:51:47,619 INFO L226 Difference]: Without dead ends: 51 [2018-12-03 16:51:47,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 16:51:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-03 16:51:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-12-03 16:51:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-03 16:51:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-12-03 16:51:47,622 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-12-03 16:51:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:47,622 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-12-03 16:51:47,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-03 16:51:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-12-03 16:51:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-03 16:51:47,623 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:47,623 INFO L402 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-12-03 16:51:47,623 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:47,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-12-03 16:51:47,623 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:47,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:47,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:47,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:47,624 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:48,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:48,522 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:48,522 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:48,522 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:48,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:48,522 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:48,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:51:48,531 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:51:48,560 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:51:48,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:48,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:48,571 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:51,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:51,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2018-12-03 16:51:51,026 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:51,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-03 16:51:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-03 16:51:51,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-12-03 16:51:51,028 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-12-03 16:51:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:51,204 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-12-03 16:51:51,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 16:51:51,204 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-12-03 16:51:51,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:51,205 INFO L225 Difference]: With dead ends: 53 [2018-12-03 16:51:51,205 INFO L226 Difference]: Without dead ends: 52 [2018-12-03 16:51:51,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-12-03 16:51:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-03 16:51:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-12-03 16:51:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-03 16:51:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-12-03 16:51:51,207 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-12-03 16:51:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:51,208 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-12-03 16:51:51,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-03 16:51:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-12-03 16:51:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-03 16:51:51,208 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:51,208 INFO L402 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-12-03 16:51:51,209 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:51,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:51,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-12-03 16:51:51,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:51,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:51,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:51:51,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:51,210 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:52,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:52,768 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:52,768 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:52,768 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:52,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:52,769 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:52,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:52,777 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:51:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:52,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:52,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:51:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:55,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:51:55,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2018-12-03 16:51:55,811 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:51:55,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 16:51:55,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 16:51:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:51:55,813 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-12-03 16:51:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:51:55,899 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-12-03 16:51:55,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-03 16:51:55,899 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-12-03 16:51:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:51:55,900 INFO L225 Difference]: With dead ends: 54 [2018-12-03 16:51:55,900 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 16:51:55,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:51:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 16:51:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-03 16:51:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-03 16:51:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-12-03 16:51:55,903 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-12-03 16:51:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:51:55,903 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-12-03 16:51:55,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 16:51:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-12-03 16:51:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-03 16:51:55,904 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:51:55,904 INFO L402 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-12-03 16:51:55,904 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:51:55,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:51:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-12-03 16:51:55,904 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:51:55,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:55,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:51:55,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:51:55,905 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:51:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:51:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:57,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:57,112 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:51:57,112 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:51:57,112 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:51:57,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:51:57,112 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:51:57,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:51:57,121 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:51:57,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-12-03 16:51:57,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:51:57,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:51:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:51:57,189 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:00,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:00,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 100 [2018-12-03 16:52:00,401 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:00,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-03 16:52:00,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-03 16:52:00,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:00,403 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-12-03 16:52:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:00,530 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-12-03 16:52:00,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 16:52:00,530 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-12-03 16:52:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:00,531 INFO L225 Difference]: With dead ends: 55 [2018-12-03 16:52:00,532 INFO L226 Difference]: Without dead ends: 54 [2018-12-03 16:52:00,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-03 16:52:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-12-03 16:52:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 16:52:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-12-03 16:52:00,535 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-12-03 16:52:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:00,535 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-12-03 16:52:00,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-03 16:52:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-12-03 16:52:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 16:52:00,535 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:00,535 INFO L402 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-12-03 16:52:00,536 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:00,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-12-03 16:52:00,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:00,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:00,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:00,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:00,537 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:02,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:02,030 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:02,030 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:02,031 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:02,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:02,031 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:02,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:52:02,043 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:52:02,088 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:52:02,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:02,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:02,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:04,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:04,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 100 [2018-12-03 16:52:04,787 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:04,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-03 16:52:04,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-03 16:52:04,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:04,789 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-12-03 16:52:04,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:04,854 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-12-03 16:52:04,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-03 16:52:04,854 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-12-03 16:52:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:04,855 INFO L225 Difference]: With dead ends: 56 [2018-12-03 16:52:04,855 INFO L226 Difference]: Without dead ends: 55 [2018-12-03 16:52:04,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-03 16:52:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-03 16:52:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-03 16:52:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-12-03 16:52:04,859 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-12-03 16:52:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:04,859 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-12-03 16:52:04,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-03 16:52:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-12-03 16:52:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-03 16:52:04,860 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:04,860 INFO L402 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-12-03 16:52:04,860 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:04,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:04,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-12-03 16:52:04,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:04,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:04,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:04,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:04,861 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:05,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:05,909 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:05,910 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:05,910 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:05,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:05,910 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:05,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:52:05,918 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:52:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:05,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:05,958 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:09,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:09,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 100 [2018-12-03 16:52:09,010 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:09,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-12-03 16:52:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-12-03 16:52:09,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:09,011 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-12-03 16:52:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:09,072 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-12-03 16:52:09,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 16:52:09,072 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-12-03 16:52:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:09,073 INFO L225 Difference]: With dead ends: 57 [2018-12-03 16:52:09,073 INFO L226 Difference]: Without dead ends: 56 [2018-12-03 16:52:09,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-03 16:52:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-03 16:52:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-03 16:52:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-12-03 16:52:09,076 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-12-03 16:52:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:09,077 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-12-03 16:52:09,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-12-03 16:52:09,077 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-12-03 16:52:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-03 16:52:09,077 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:09,077 INFO L402 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-12-03 16:52:09,078 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:09,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-12-03 16:52:09,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:09,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:09,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:52:09,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:09,079 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:10,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:10,191 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:10,191 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:10,191 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:10,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:10,191 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:10,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:52:10,201 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:52:10,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-12-03 16:52:10,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:10,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:10,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:13,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:13,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 100 [2018-12-03 16:52:13,279 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:13,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 16:52:13,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 16:52:13,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:13,281 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-12-03 16:52:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:13,349 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-12-03 16:52:13,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-12-03 16:52:13,349 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-12-03 16:52:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:13,350 INFO L225 Difference]: With dead ends: 58 [2018-12-03 16:52:13,351 INFO L226 Difference]: Without dead ends: 57 [2018-12-03 16:52:13,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-03 16:52:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-03 16:52:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-03 16:52:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-12-03 16:52:13,355 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-12-03 16:52:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:13,356 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-12-03 16:52:13,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 16:52:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-12-03 16:52:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 16:52:13,356 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:13,356 INFO L402 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-12-03 16:52:13,356 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:13,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-12-03 16:52:13,357 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:13,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:13,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:13,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:13,358 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:14,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:14,475 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:14,475 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:14,475 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:14,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:14,475 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:14,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:52:14,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:52:14,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:52:14,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:14,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:14,523 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:17,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:17,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 100 [2018-12-03 16:52:17,558 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:17,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-12-03 16:52:17,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-12-03 16:52:17,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:17,559 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-12-03 16:52:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:17,631 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-12-03 16:52:17,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 16:52:17,632 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-12-03 16:52:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:17,632 INFO L225 Difference]: With dead ends: 59 [2018-12-03 16:52:17,633 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 16:52:17,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 16:52:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-03 16:52:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-03 16:52:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-12-03 16:52:17,635 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-12-03 16:52:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:17,636 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-12-03 16:52:17,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-12-03 16:52:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-12-03 16:52:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-03 16:52:17,636 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:17,636 INFO L402 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-12-03 16:52:17,636 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:17,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-12-03 16:52:17,637 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:17,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:17,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:17,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:17,637 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:18,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:18,787 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:18,787 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:18,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:18,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:18,787 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:18,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:52:18,795 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:52:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:18,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:18,847 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:21,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:21,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 100 [2018-12-03 16:52:21,718 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:21,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-12-03 16:52:21,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-12-03 16:52:21,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:21,720 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-12-03 16:52:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:21,868 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-12-03 16:52:21,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-03 16:52:21,868 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-12-03 16:52:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:21,869 INFO L225 Difference]: With dead ends: 60 [2018-12-03 16:52:21,869 INFO L226 Difference]: Without dead ends: 59 [2018-12-03 16:52:21,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-03 16:52:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-03 16:52:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 16:52:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-12-03 16:52:21,871 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-12-03 16:52:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:21,871 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-12-03 16:52:21,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-12-03 16:52:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-12-03 16:52:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 16:52:21,872 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:21,872 INFO L402 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-12-03 16:52:21,872 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:21,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:21,872 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-12-03 16:52:21,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:21,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:21,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:52:21,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:21,873 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:23,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:23,211 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:23,211 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:23,211 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:23,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:23,211 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:23,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:52:23,221 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:52:23,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-12-03 16:52:23,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:23,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:23,279 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:26,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:26,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 100 [2018-12-03 16:52:26,105 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:26,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-12-03 16:52:26,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-12-03 16:52:26,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:26,106 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-12-03 16:52:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:26,201 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-12-03 16:52:26,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 16:52:26,202 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-12-03 16:52:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:26,203 INFO L225 Difference]: With dead ends: 61 [2018-12-03 16:52:26,203 INFO L226 Difference]: Without dead ends: 60 [2018-12-03 16:52:26,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 14 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-03 16:52:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-03 16:52:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-03 16:52:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-12-03 16:52:26,207 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-12-03 16:52:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:26,207 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-12-03 16:52:26,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-12-03 16:52:26,207 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-12-03 16:52:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-03 16:52:26,208 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:26,208 INFO L402 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-12-03 16:52:26,208 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:26,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-12-03 16:52:26,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:26,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:26,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:26,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:26,209 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:27,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:27,798 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:27,798 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:27,798 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:27,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:27,798 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:27,807 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:52:27,807 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:52:27,843 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:52:27,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:27,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:27,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:30,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:30,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 100 [2018-12-03 16:52:30,675 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:30,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 16:52:30,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 16:52:30,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:30,676 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-12-03 16:52:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:30,772 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-12-03 16:52:30,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-12-03 16:52:30,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-12-03 16:52:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:30,773 INFO L225 Difference]: With dead ends: 62 [2018-12-03 16:52:30,773 INFO L226 Difference]: Without dead ends: 61 [2018-12-03 16:52:30,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-03 16:52:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-03 16:52:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-03 16:52:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-12-03 16:52:30,777 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-12-03 16:52:30,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:30,777 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-12-03 16:52:30,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 16:52:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-12-03 16:52:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-12-03 16:52:30,778 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:30,778 INFO L402 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-12-03 16:52:30,778 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:30,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-12-03 16:52:30,779 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:30,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:30,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:30,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:30,779 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:32,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:32,660 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:32,661 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:32,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:32,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:32,661 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:32,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:52:32,670 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:52:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:32,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:32,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:35,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:35,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 100 [2018-12-03 16:52:35,599 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:35,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-12-03 16:52:35,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-12-03 16:52:35,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:35,601 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-12-03 16:52:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:35,695 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-12-03 16:52:35,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 16:52:35,695 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-12-03 16:52:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:35,696 INFO L225 Difference]: With dead ends: 63 [2018-12-03 16:52:35,696 INFO L226 Difference]: Without dead ends: 62 [2018-12-03 16:52:35,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 18 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-03 16:52:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-12-03 16:52:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-03 16:52:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-12-03 16:52:35,700 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-12-03 16:52:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:35,700 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-12-03 16:52:35,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-12-03 16:52:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-12-03 16:52:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-03 16:52:35,701 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:35,701 INFO L402 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-12-03 16:52:35,701 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:35,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-12-03 16:52:35,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:35,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:35,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:52:35,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:35,703 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:37,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:37,349 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:37,349 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:37,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:37,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:37,350 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:37,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:52:37,359 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:52:37,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-12-03 16:52:37,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:37,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:37,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:40,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:40,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 100 [2018-12-03 16:52:40,385 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:40,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-12-03 16:52:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-12-03 16:52:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:40,386 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-12-03 16:52:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:40,483 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-12-03 16:52:40,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-12-03 16:52:40,483 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-12-03 16:52:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:40,484 INFO L225 Difference]: With dead ends: 64 [2018-12-03 16:52:40,484 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 16:52:40,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 20 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 16:52:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-12-03 16:52:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-03 16:52:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-12-03 16:52:40,487 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-12-03 16:52:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:40,488 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-12-03 16:52:40,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-12-03 16:52:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-12-03 16:52:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-03 16:52:40,488 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:40,488 INFO L402 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-12-03 16:52:40,488 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:40,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:40,488 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-12-03 16:52:40,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:40,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:40,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:40,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:40,489 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:41,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:41,930 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:41,931 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:41,931 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:41,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:41,931 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:41,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:52:41,939 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:52:41,975 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:52:41,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:41,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:41,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:45,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:45,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 100 [2018-12-03 16:52:45,117 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:45,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-12-03 16:52:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-12-03 16:52:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:45,118 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-12-03 16:52:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:45,210 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-12-03 16:52:45,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 16:52:45,211 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-12-03 16:52:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:45,211 INFO L225 Difference]: With dead ends: 65 [2018-12-03 16:52:45,212 INFO L226 Difference]: Without dead ends: 64 [2018-12-03 16:52:45,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 22 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-03 16:52:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-03 16:52:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 16:52:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-12-03 16:52:45,215 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-12-03 16:52:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:45,215 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-12-03 16:52:45,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-12-03 16:52:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-12-03 16:52:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 16:52:45,215 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:45,215 INFO L402 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-12-03 16:52:45,215 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:45,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:45,216 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-12-03 16:52:45,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:45,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:45,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:45,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:45,216 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:48,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:48,759 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:48,759 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:48,759 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:48,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:48,759 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:48,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:52:48,771 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:52:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:48,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:48,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:51,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:51,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 100 [2018-12-03 16:52:51,736 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:51,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 16:52:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 16:52:51,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:51,737 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-12-03 16:52:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:51,809 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-12-03 16:52:51,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-03 16:52:51,810 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-12-03 16:52:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:51,810 INFO L225 Difference]: With dead ends: 66 [2018-12-03 16:52:51,811 INFO L226 Difference]: Without dead ends: 65 [2018-12-03 16:52:51,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 24 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-03 16:52:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-12-03 16:52:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-03 16:52:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-12-03 16:52:51,814 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-12-03 16:52:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:51,814 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-12-03 16:52:51,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 16:52:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-12-03 16:52:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-03 16:52:51,815 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:51,815 INFO L402 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-12-03 16:52:51,815 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:51,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:51,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-12-03 16:52:51,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:51,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:51,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:52:51,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:51,817 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:53,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:53,441 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:53,441 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:53,441 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:53,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:53,441 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:53,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:52:53,450 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:52:53,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-12-03 16:52:53,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:53,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:53,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:52:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:56,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:52:56,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 100 [2018-12-03 16:52:56,477 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:52:56,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-12-03 16:52:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-12-03 16:52:56,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:56,479 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-12-03 16:52:56,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:52:56,580 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-12-03 16:52:56,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 16:52:56,581 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-12-03 16:52:56,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:52:56,581 INFO L225 Difference]: With dead ends: 67 [2018-12-03 16:52:56,582 INFO L226 Difference]: Without dead ends: 66 [2018-12-03 16:52:56,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 26 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:52:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-03 16:52:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-12-03 16:52:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-03 16:52:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-12-03 16:52:56,585 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-12-03 16:52:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:52:56,585 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-12-03 16:52:56,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-12-03 16:52:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-12-03 16:52:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-03 16:52:56,586 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:52:56,586 INFO L402 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-12-03 16:52:56,586 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:52:56,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:52:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-12-03 16:52:56,587 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:52:56,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:56,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:52:56,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:52:56,588 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:52:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:52:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:59,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:59,096 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:52:59,097 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:52:59,097 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:52:59,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:52:59,097 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:52:59,110 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:52:59,110 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:52:59,145 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:52:59,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:52:59,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:52:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:52:59,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:02,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:02,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 100 [2018-12-03 16:53:02,222 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:02,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-12-03 16:53:02,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-12-03 16:53:02,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:02,224 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-12-03 16:53:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:02,336 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-12-03 16:53:02,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-12-03 16:53:02,336 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-12-03 16:53:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:02,337 INFO L225 Difference]: With dead ends: 68 [2018-12-03 16:53:02,338 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 16:53:02,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 28 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 16:53:02,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-03 16:53:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-03 16:53:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-12-03 16:53:02,342 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-12-03 16:53:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:02,342 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-12-03 16:53:02,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-12-03 16:53:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-12-03 16:53:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-12-03 16:53:02,343 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:02,343 INFO L402 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-12-03 16:53:02,343 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:02,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-12-03 16:53:02,343 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:02,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:02,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:53:02,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:02,344 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:04,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:04,168 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:04,168 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:04,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:04,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:04,169 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:04,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:53:04,177 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:53:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:04,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:04,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:07,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:07,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 100 [2018-12-03 16:53:07,322 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:07,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-12-03 16:53:07,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-12-03 16:53:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:07,324 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-12-03 16:53:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:07,422 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-12-03 16:53:07,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 16:53:07,423 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-12-03 16:53:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:07,424 INFO L225 Difference]: With dead ends: 69 [2018-12-03 16:53:07,424 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 16:53:07,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 30 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 16:53:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-03 16:53:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-03 16:53:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-12-03 16:53:07,428 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-12-03 16:53:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:07,428 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-12-03 16:53:07,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-12-03 16:53:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-12-03 16:53:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-03 16:53:07,429 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:07,429 INFO L402 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-12-03 16:53:07,429 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:07,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-12-03 16:53:07,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:07,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:07,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:53:07,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:07,431 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:09,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:09,239 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:09,239 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:09,239 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:09,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:09,240 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:09,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:53:09,248 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:53:09,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-12-03 16:53:09,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:53:09,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:09,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:12,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:12,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 100 [2018-12-03 16:53:12,387 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:12,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 16:53:12,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 16:53:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:12,389 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-12-03 16:53:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:12,496 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-12-03 16:53:12,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-12-03 16:53:12,496 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-12-03 16:53:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:12,497 INFO L225 Difference]: With dead ends: 70 [2018-12-03 16:53:12,497 INFO L226 Difference]: Without dead ends: 69 [2018-12-03 16:53:12,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 32 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-03 16:53:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-12-03 16:53:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 16:53:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-12-03 16:53:12,500 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-12-03 16:53:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:12,500 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-12-03 16:53:12,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 16:53:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-12-03 16:53:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 16:53:12,501 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:12,501 INFO L402 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-12-03 16:53:12,501 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:12,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-12-03 16:53:12,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:12,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:12,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:53:12,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:12,502 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:14,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:14,397 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:14,398 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:14,398 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:14,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:14,398 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:14,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:53:14,406 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:53:14,445 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:53:14,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:53:14,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:14,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:17,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:17,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 100 [2018-12-03 16:53:17,461 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:17,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-12-03 16:53:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-12-03 16:53:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:17,462 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-12-03 16:53:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:17,562 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-12-03 16:53:17,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 16:53:17,563 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-12-03 16:53:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:17,564 INFO L225 Difference]: With dead ends: 71 [2018-12-03 16:53:17,564 INFO L226 Difference]: Without dead ends: 70 [2018-12-03 16:53:17,565 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 34 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-03 16:53:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-12-03 16:53:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-12-03 16:53:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-12-03 16:53:17,567 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-12-03 16:53:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:17,567 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-12-03 16:53:17,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-12-03 16:53:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-12-03 16:53:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-03 16:53:17,567 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:17,568 INFO L402 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-12-03 16:53:17,568 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:17,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:17,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-12-03 16:53:17,568 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:17,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:17,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:53:17,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:17,569 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:19,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:19,670 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:19,670 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:19,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:19,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:19,670 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:19,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:53:19,679 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:53:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:19,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:19,736 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:22,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:22,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 100 [2018-12-03 16:53:22,974 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:22,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-12-03 16:53:22,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-12-03 16:53:22,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:22,975 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-12-03 16:53:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:23,086 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-12-03 16:53:23,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-12-03 16:53:23,086 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-12-03 16:53:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:23,087 INFO L225 Difference]: With dead ends: 72 [2018-12-03 16:53:23,087 INFO L226 Difference]: Without dead ends: 71 [2018-12-03 16:53:23,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 36 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-03 16:53:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-12-03 16:53:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-03 16:53:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-12-03 16:53:23,091 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-12-03 16:53:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:23,091 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-12-03 16:53:23,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-12-03 16:53:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-12-03 16:53:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-03 16:53:23,091 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:23,091 INFO L402 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-12-03 16:53:23,091 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:23,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:23,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-12-03 16:53:23,092 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:23,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:23,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:53:23,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:23,093 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:25,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:25,076 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:25,076 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:25,076 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:25,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:25,077 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:25,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:53:25,084 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:53:25,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-12-03 16:53:25,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:53:25,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:25,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:28,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:28,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 100 [2018-12-03 16:53:28,237 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:28,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-12-03 16:53:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-12-03 16:53:28,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:28,238 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-12-03 16:53:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:28,410 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-12-03 16:53:28,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 16:53:28,410 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-12-03 16:53:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:28,411 INFO L225 Difference]: With dead ends: 73 [2018-12-03 16:53:28,411 INFO L226 Difference]: Without dead ends: 72 [2018-12-03 16:53:28,411 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 38 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-03 16:53:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-12-03 16:53:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-03 16:53:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-12-03 16:53:28,413 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-12-03 16:53:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:28,413 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-12-03 16:53:28,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-12-03 16:53:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-12-03 16:53:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-03 16:53:28,414 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:28,414 INFO L402 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-12-03 16:53:28,414 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:28,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:28,414 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-12-03 16:53:28,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:28,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:28,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:53:28,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:28,415 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:30,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:30,912 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:30,913 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:30,913 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:30,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:30,913 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:30,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:53:30,921 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:53:30,959 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:53:30,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:53:30,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:30,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:34,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:34,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 100 [2018-12-03 16:53:34,372 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:34,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 16:53:34,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 16:53:34,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:34,373 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-12-03 16:53:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:34,541 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-12-03 16:53:34,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-12-03 16:53:34,542 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-12-03 16:53:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:34,542 INFO L225 Difference]: With dead ends: 74 [2018-12-03 16:53:34,543 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 16:53:34,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 40 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 16:53:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-12-03 16:53:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-12-03 16:53:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-12-03 16:53:34,546 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-12-03 16:53:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:34,546 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-12-03 16:53:34,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 16:53:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-12-03 16:53:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-03 16:53:34,547 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:34,547 INFO L402 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-12-03 16:53:34,547 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:34,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:34,547 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-12-03 16:53:34,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:34,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:34,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:53:34,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:34,548 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:36,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:36,335 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:36,335 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:36,335 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:36,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:36,335 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:36,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:53:36,343 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:53:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:36,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:36,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:40,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:40,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 100 [2018-12-03 16:53:40,896 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:40,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-12-03 16:53:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-12-03 16:53:40,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:40,897 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-12-03 16:53:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:41,788 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-12-03 16:53:41,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 16:53:41,789 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-12-03 16:53:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:41,789 INFO L225 Difference]: With dead ends: 75 [2018-12-03 16:53:41,789 INFO L226 Difference]: Without dead ends: 74 [2018-12-03 16:53:41,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 42 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-03 16:53:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-12-03 16:53:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 16:53:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-12-03 16:53:41,793 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-12-03 16:53:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:41,793 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-12-03 16:53:41,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-12-03 16:53:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-12-03 16:53:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 16:53:41,793 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:41,794 INFO L402 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-12-03 16:53:41,794 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:41,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-12-03 16:53:41,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:41,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:41,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:53:41,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:41,795 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:43,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:43,999 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:44,000 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:44,000 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:44,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:44,000 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:44,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:53:44,008 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:53:44,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-12-03 16:53:44,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:53:44,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:44,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:47,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:47,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 100 [2018-12-03 16:53:47,180 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:47,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-12-03 16:53:47,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-12-03 16:53:47,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:47,183 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-12-03 16:53:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:47,436 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-12-03 16:53:47,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-12-03 16:53:47,437 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-12-03 16:53:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:47,438 INFO L225 Difference]: With dead ends: 76 [2018-12-03 16:53:47,438 INFO L226 Difference]: Without dead ends: 75 [2018-12-03 16:53:47,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 44 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-12-03 16:53:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-12-03 16:53:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-03 16:53:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-12-03 16:53:47,442 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-12-03 16:53:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:47,443 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-12-03 16:53:47,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-12-03 16:53:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-12-03 16:53:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-12-03 16:53:47,443 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:47,443 INFO L402 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-12-03 16:53:47,444 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:47,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-12-03 16:53:47,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:47,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:47,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:53:47,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:47,445 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:49,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:49,691 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:49,691 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:49,691 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:49,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:49,691 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:49,699 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:53:49,699 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:53:49,752 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:53:49,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:53:49,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:49,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:53,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:53,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 100 [2018-12-03 16:53:53,005 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:53,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-12-03 16:53:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-12-03 16:53:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:53,007 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-12-03 16:53:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:53,117 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-12-03 16:53:53,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 16:53:53,117 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-12-03 16:53:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:53,118 INFO L225 Difference]: With dead ends: 77 [2018-12-03 16:53:53,118 INFO L226 Difference]: Without dead ends: 76 [2018-12-03 16:53:53,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 46 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-03 16:53:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-12-03 16:53:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-03 16:53:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-12-03 16:53:53,123 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-12-03 16:53:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:53,123 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-12-03 16:53:53,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-12-03 16:53:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-12-03 16:53:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-03 16:53:53,124 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:53,124 INFO L402 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-12-03 16:53:53,124 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:53,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-12-03 16:53:53,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:53,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:53,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:53:53,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:53,126 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:55,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:55,317 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:53:55,317 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:53:55,317 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:53:55,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:53:55,317 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:53:55,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:53:55,326 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:53:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:53:55,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:53:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:55,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:53:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:53:58,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:53:58,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 100 [2018-12-03 16:53:58,659 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:53:58,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 16:53:58,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 16:53:58,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:58,661 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-12-03 16:53:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:53:58,792 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-12-03 16:53:58,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-12-03 16:53:58,793 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-12-03 16:53:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:53:58,794 INFO L225 Difference]: With dead ends: 78 [2018-12-03 16:53:58,794 INFO L226 Difference]: Without dead ends: 77 [2018-12-03 16:53:58,795 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 48 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:53:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-03 16:53:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-12-03 16:53:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-03 16:53:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-12-03 16:53:58,798 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-12-03 16:53:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:53:58,798 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-12-03 16:53:58,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 16:53:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-12-03 16:53:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-12-03 16:53:58,799 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:53:58,799 INFO L402 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-12-03 16:53:58,799 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:53:58,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:53:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-12-03 16:53:58,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:53:58,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:58,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:53:58,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:53:58,801 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:53:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:01,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:01,187 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:01,187 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:01,187 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:01,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:01,187 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:01,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:54:01,195 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:54:01,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2018-12-03 16:54:01,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:54:01,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:01,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:05,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:05,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 100 [2018-12-03 16:54:05,020 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:05,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-12-03 16:54:05,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-12-03 16:54:05,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:05,021 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-12-03 16:54:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:05,135 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-12-03 16:54:05,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 16:54:05,136 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-12-03 16:54:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:05,136 INFO L225 Difference]: With dead ends: 79 [2018-12-03 16:54:05,137 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 16:54:05,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 50 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 16:54:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-12-03 16:54:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-03 16:54:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-12-03 16:54:05,140 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-12-03 16:54:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:05,141 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-12-03 16:54:05,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-12-03 16:54:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-12-03 16:54:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-03 16:54:05,141 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:05,141 INFO L402 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-12-03 16:54:05,142 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:05,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-12-03 16:54:05,142 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:05,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:05,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:54:05,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:05,143 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:07,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:07,110 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:07,110 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:07,110 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:07,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:07,110 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:07,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:54:07,118 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:54:07,162 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:54:07,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:54:07,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:07,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:10,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:10,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 100 [2018-12-03 16:54:10,590 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:10,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-12-03 16:54:10,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-12-03 16:54:10,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:10,592 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-12-03 16:54:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:10,752 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-12-03 16:54:10,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-12-03 16:54:10,752 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-12-03 16:54:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:10,753 INFO L225 Difference]: With dead ends: 80 [2018-12-03 16:54:10,753 INFO L226 Difference]: Without dead ends: 79 [2018-12-03 16:54:10,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 52 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2574 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:10,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-03 16:54:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-12-03 16:54:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 16:54:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-12-03 16:54:10,757 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-12-03 16:54:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:10,757 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-12-03 16:54:10,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-12-03 16:54:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-12-03 16:54:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 16:54:10,757 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:10,757 INFO L402 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-12-03 16:54:10,758 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:10,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-12-03 16:54:10,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:10,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:10,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:54:10,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:10,759 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:12,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:12,851 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:12,851 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:12,851 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:12,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:12,851 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:12,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:54:12,860 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:54:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:12,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:12,914 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:16,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:16,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 100 [2018-12-03 16:54:16,329 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:16,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-12-03 16:54:16,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-12-03 16:54:16,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:16,330 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-12-03 16:54:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:16,436 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-12-03 16:54:16,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 16:54:16,437 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-12-03 16:54:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:16,437 INFO L225 Difference]: With dead ends: 81 [2018-12-03 16:54:16,437 INFO L226 Difference]: Without dead ends: 80 [2018-12-03 16:54:16,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 54 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-03 16:54:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-12-03 16:54:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-03 16:54:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-12-03 16:54:16,441 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-12-03 16:54:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:16,441 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-12-03 16:54:16,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-12-03 16:54:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-12-03 16:54:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-03 16:54:16,442 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:16,442 INFO L402 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-12-03 16:54:16,442 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:16,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:16,443 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-12-03 16:54:16,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:16,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:16,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:54:16,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:16,444 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:18,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:18,541 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:18,542 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:18,542 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:18,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:18,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:18,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:54:18,560 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:54:18,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-12-03 16:54:18,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:54:18,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:18,638 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:22,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:22,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 100 [2018-12-03 16:54:22,207 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:22,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 16:54:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 16:54:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:22,208 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-12-03 16:54:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:23,407 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-12-03 16:54:23,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-12-03 16:54:23,407 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-12-03 16:54:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:23,408 INFO L225 Difference]: With dead ends: 82 [2018-12-03 16:54:23,408 INFO L226 Difference]: Without dead ends: 81 [2018-12-03 16:54:23,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 56 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-12-03 16:54:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-12-03 16:54:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-12-03 16:54:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-12-03 16:54:23,412 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-12-03 16:54:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:23,412 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-12-03 16:54:23,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 16:54:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-12-03 16:54:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-03 16:54:23,413 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:23,413 INFO L402 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-12-03 16:54:23,413 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:23,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-12-03 16:54:23,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:23,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:23,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:54:23,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:23,415 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:25,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:25,925 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:25,925 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:25,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:25,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:25,925 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:25,934 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:54:25,934 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:54:25,979 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:54:25,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:54:25,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:26,004 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:29,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:29,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 100 [2018-12-03 16:54:29,414 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:29,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-12-03 16:54:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-12-03 16:54:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:29,415 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-12-03 16:54:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:29,577 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-12-03 16:54:29,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 16:54:29,577 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-12-03 16:54:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:29,578 INFO L225 Difference]: With dead ends: 83 [2018-12-03 16:54:29,578 INFO L226 Difference]: Without dead ends: 82 [2018-12-03 16:54:29,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 58 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-03 16:54:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-12-03 16:54:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-03 16:54:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-12-03 16:54:29,582 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-12-03 16:54:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:29,582 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-12-03 16:54:29,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-12-03 16:54:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-12-03 16:54:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-03 16:54:29,583 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:29,583 INFO L402 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-12-03 16:54:29,583 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:29,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:29,584 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-12-03 16:54:29,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:29,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:29,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:54:29,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:29,585 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:32,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:32,155 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:32,155 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:32,155 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:32,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:32,155 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:32,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:54:32,166 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:54:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:32,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:32,223 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:35,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:35,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 100 [2018-12-03 16:54:35,898 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:35,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-12-03 16:54:35,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-12-03 16:54:35,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:35,900 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-12-03 16:54:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:36,050 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-12-03 16:54:36,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-12-03 16:54:36,050 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-12-03 16:54:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:36,051 INFO L225 Difference]: With dead ends: 84 [2018-12-03 16:54:36,051 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 16:54:36,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 60 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 16:54:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-12-03 16:54:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-03 16:54:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-12-03 16:54:36,055 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-12-03 16:54:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:36,055 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-12-03 16:54:36,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-12-03 16:54:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-12-03 16:54:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-03 16:54:36,055 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:36,055 INFO L402 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-12-03 16:54:36,055 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:36,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:36,056 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-12-03 16:54:36,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:36,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:36,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:54:36,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:36,056 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:38,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:38,575 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:38,576 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:38,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:38,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:38,576 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:38,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:54:38,585 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:54:38,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-12-03 16:54:38,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:54:38,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:38,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:42,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:42,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 100 [2018-12-03 16:54:42,294 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:42,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-12-03 16:54:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-12-03 16:54:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:42,295 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-12-03 16:54:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:42,401 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-12-03 16:54:42,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 16:54:42,401 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-12-03 16:54:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:42,402 INFO L225 Difference]: With dead ends: 85 [2018-12-03 16:54:42,402 INFO L226 Difference]: Without dead ends: 84 [2018-12-03 16:54:42,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 62 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-12-03 16:54:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-12-03 16:54:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 16:54:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-12-03 16:54:42,404 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-12-03 16:54:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:42,404 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-12-03 16:54:42,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-12-03 16:54:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-12-03 16:54:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 16:54:42,405 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:42,405 INFO L402 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-12-03 16:54:42,405 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:42,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-12-03 16:54:42,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:42,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:42,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:54:42,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:42,406 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:44,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:44,759 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:44,760 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:44,760 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:44,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:44,760 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:44,768 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:54:44,768 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:54:44,817 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:54:44,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:54:44,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:44,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:48,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:48,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 100 [2018-12-03 16:54:48,834 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:48,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 16:54:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 16:54:48,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:48,835 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-12-03 16:54:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:48,946 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-12-03 16:54:48,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-12-03 16:54:48,946 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-12-03 16:54:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:48,947 INFO L225 Difference]: With dead ends: 86 [2018-12-03 16:54:48,947 INFO L226 Difference]: Without dead ends: 85 [2018-12-03 16:54:48,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 64 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-03 16:54:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-12-03 16:54:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-12-03 16:54:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-12-03 16:54:48,950 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-12-03 16:54:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:48,951 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-12-03 16:54:48,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 16:54:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-12-03 16:54:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-12-03 16:54:48,951 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:48,951 INFO L402 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-12-03 16:54:48,951 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:48,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-12-03 16:54:48,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:48,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:48,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:54:48,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:48,953 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:51,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:51,905 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:51,905 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:51,906 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:51,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:51,906 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:51,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:54:51,915 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:54:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:51,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:51,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:54:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:55,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:54:55,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 100 [2018-12-03 16:54:55,280 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:54:55,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-12-03 16:54:55,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-12-03 16:54:55,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:55,281 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-12-03 16:54:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:54:55,499 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-12-03 16:54:55,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 16:54:55,499 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-12-03 16:54:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:54:55,500 INFO L225 Difference]: With dead ends: 87 [2018-12-03 16:54:55,500 INFO L226 Difference]: Without dead ends: 86 [2018-12-03 16:54:55,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 83 SyntacticMatches, 66 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:54:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-03 16:54:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-12-03 16:54:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-03 16:54:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-12-03 16:54:55,504 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-12-03 16:54:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:54:55,505 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-12-03 16:54:55,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-12-03 16:54:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-12-03 16:54:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-03 16:54:55,505 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:54:55,506 INFO L402 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-12-03 16:54:55,506 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:54:55,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:54:55,506 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-12-03 16:54:55,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:54:55,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:55,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:54:55,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:54:55,507 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:54:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:54:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:58,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:58,079 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:54:58,079 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:54:58,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:54:58,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:54:58,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:54:58,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:54:58,088 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:54:58,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-12-03 16:54:58,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:54:58,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:54:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:54:58,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:01,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:01,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 100 [2018-12-03 16:55:01,835 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:01,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-12-03 16:55:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-12-03 16:55:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:01,836 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-12-03 16:55:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:02,002 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-12-03 16:55:02,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-12-03 16:55:02,002 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-12-03 16:55:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:02,003 INFO L225 Difference]: With dead ends: 88 [2018-12-03 16:55:02,003 INFO L226 Difference]: Without dead ends: 87 [2018-12-03 16:55:02,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 84 SyntacticMatches, 68 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3366 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-12-03 16:55:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-12-03 16:55:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-03 16:55:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-12-03 16:55:02,006 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-12-03 16:55:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:02,006 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-12-03 16:55:02,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-12-03 16:55:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-12-03 16:55:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-12-03 16:55:02,007 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:02,007 INFO L402 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-12-03 16:55:02,007 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:02,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-12-03 16:55:02,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:02,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:02,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:55:02,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:02,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:04,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:04,485 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:04,485 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:04,485 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:04,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:04,486 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:04,493 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:55:04,493 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:55:04,542 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:55:04,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:55:04,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:04,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:08,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:08,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 100 [2018-12-03 16:55:08,162 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:08,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-12-03 16:55:08,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-12-03 16:55:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:08,163 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-12-03 16:55:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:08,418 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-12-03 16:55:08,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 16:55:08,419 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-12-03 16:55:08,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:08,420 INFO L225 Difference]: With dead ends: 89 [2018-12-03 16:55:08,420 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 16:55:08,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 85 SyntacticMatches, 70 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3465 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 16:55:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-12-03 16:55:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-03 16:55:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-12-03 16:55:08,423 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-12-03 16:55:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:08,423 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-12-03 16:55:08,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-12-03 16:55:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-12-03 16:55:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-03 16:55:08,424 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:08,424 INFO L402 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-12-03 16:55:08,424 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:08,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-12-03 16:55:08,425 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:08,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:08,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:55:08,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:08,425 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:11,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:11,200 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:11,200 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:11,200 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:11,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:11,200 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:11,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:55:11,211 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:55:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:11,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:11,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:14,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:14,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 100 [2018-12-03 16:55:14,558 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:14,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 16:55:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 16:55:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:14,559 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-12-03 16:55:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:14,746 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-12-03 16:55:14,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-12-03 16:55:14,746 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-12-03 16:55:14,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:14,747 INFO L225 Difference]: With dead ends: 90 [2018-12-03 16:55:14,747 INFO L226 Difference]: Without dead ends: 89 [2018-12-03 16:55:14,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 86 SyntacticMatches, 72 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-03 16:55:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-12-03 16:55:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 16:55:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-12-03 16:55:14,752 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-12-03 16:55:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:14,752 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-12-03 16:55:14,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 16:55:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-12-03 16:55:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 16:55:14,753 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:14,753 INFO L402 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-12-03 16:55:14,753 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:14,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-12-03 16:55:14,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:14,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:14,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:55:14,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:14,755 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:17,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:17,602 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:17,602 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:17,602 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:17,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:17,602 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:17,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:55:17,611 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:55:17,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-12-03 16:55:17,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:55:17,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:17,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:21,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:21,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 100 [2018-12-03 16:55:21,238 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:21,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-12-03 16:55:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-12-03 16:55:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:21,239 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-12-03 16:55:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:21,410 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-12-03 16:55:21,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 16:55:21,411 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-12-03 16:55:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:21,412 INFO L225 Difference]: With dead ends: 91 [2018-12-03 16:55:21,412 INFO L226 Difference]: Without dead ends: 90 [2018-12-03 16:55:21,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 87 SyntacticMatches, 74 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-03 16:55:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-12-03 16:55:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-12-03 16:55:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-12-03 16:55:21,415 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-12-03 16:55:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:21,415 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-12-03 16:55:21,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-12-03 16:55:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-12-03 16:55:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-03 16:55:21,415 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:21,416 INFO L402 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-12-03 16:55:21,416 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:21,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:21,416 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-12-03 16:55:21,416 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:21,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:21,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:55:21,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:21,417 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:24,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:24,279 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:24,279 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:24,279 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:24,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:24,279 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:24,287 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:55:24,288 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:55:24,336 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:55:24,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:55:24,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:24,355 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:28,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:28,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 100 [2018-12-03 16:55:28,043 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:28,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-12-03 16:55:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-12-03 16:55:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:28,044 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-12-03 16:55:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:28,159 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-12-03 16:55:28,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-12-03 16:55:28,159 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-12-03 16:55:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:28,160 INFO L225 Difference]: With dead ends: 92 [2018-12-03 16:55:28,160 INFO L226 Difference]: Without dead ends: 91 [2018-12-03 16:55:28,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 88 SyntacticMatches, 76 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-03 16:55:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-12-03 16:55:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-03 16:55:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-12-03 16:55:28,164 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-12-03 16:55:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:28,164 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-12-03 16:55:28,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-12-03 16:55:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-12-03 16:55:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-12-03 16:55:28,164 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:28,164 INFO L402 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-12-03 16:55:28,165 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:28,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:28,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-12-03 16:55:28,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:28,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:28,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:55:28,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:28,166 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:30,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:30,916 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:30,916 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:30,916 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:30,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:30,916 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:30,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:55:30,925 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:55:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:30,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:30,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:34,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:34,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 100 [2018-12-03 16:55:34,719 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:34,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-12-03 16:55:34,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-12-03 16:55:34,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:34,720 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-12-03 16:55:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:34,912 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-12-03 16:55:34,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 16:55:34,913 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-12-03 16:55:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:34,913 INFO L225 Difference]: With dead ends: 93 [2018-12-03 16:55:34,914 INFO L226 Difference]: Without dead ends: 92 [2018-12-03 16:55:34,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 89 SyntacticMatches, 78 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-12-03 16:55:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-12-03 16:55:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-03 16:55:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-12-03 16:55:34,917 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-12-03 16:55:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:34,917 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-12-03 16:55:34,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-12-03 16:55:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-12-03 16:55:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-12-03 16:55:34,918 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:34,918 INFO L402 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-12-03 16:55:34,918 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:34,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364641, now seen corresponding path program 89 times [2018-12-03 16:55:34,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:34,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:34,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:55:34,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:34,919 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:37,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:37,974 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:37,974 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:37,974 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:37,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:37,974 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:37,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:55:37,982 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:55:38,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-12-03 16:55:38,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:55:38,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:38,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:41,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:41,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 100 [2018-12-03 16:55:41,455 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:41,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 16:55:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 16:55:41,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:41,456 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-12-03 16:55:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:41,721 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-12-03 16:55:41,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-12-03 16:55:41,721 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-12-03 16:55:41,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:41,722 INFO L225 Difference]: With dead ends: 94 [2018-12-03 16:55:41,722 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 16:55:41,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 90 SyntacticMatches, 80 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 16:55:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-12-03 16:55:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-03 16:55:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-12-03 16:55:41,725 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-12-03 16:55:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:41,725 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-12-03 16:55:41,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 16:55:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-12-03 16:55:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-12-03 16:55:41,726 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:41,726 INFO L402 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-12-03 16:55:41,726 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:41,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663559, now seen corresponding path program 90 times [2018-12-03 16:55:41,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:41,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:41,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:55:41,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:41,727 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:44,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:44,642 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:44,642 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:44,642 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:44,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:44,642 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:44,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:55:44,653 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:55:44,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:55:44,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:55:44,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:44,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:48,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:48,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 100 [2018-12-03 16:55:48,516 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:48,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-12-03 16:55:48,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-12-03 16:55:48,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:48,517 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-12-03 16:55:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:48,713 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-12-03 16:55:48,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 16:55:48,714 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-12-03 16:55:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:48,714 INFO L225 Difference]: With dead ends: 95 [2018-12-03 16:55:48,715 INFO L226 Difference]: Without dead ends: 94 [2018-12-03 16:55:48,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 91 SyntacticMatches, 82 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4059 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-12-03 16:55:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-12-03 16:55:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 16:55:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-12-03 16:55:48,719 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-12-03 16:55:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:48,719 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-12-03 16:55:48,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-12-03 16:55:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-12-03 16:55:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 16:55:48,719 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:48,720 INFO L402 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-12-03 16:55:48,720 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:48,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930017, now seen corresponding path program 91 times [2018-12-03 16:55:48,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:48,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:48,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:55:48,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:48,721 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:51,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:51,656 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:51,656 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:51,656 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:51,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:51,657 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:51,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:55:51,666 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:55:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:51,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:51,733 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:55:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:55,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:55:55,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 100 [2018-12-03 16:55:55,284 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:55:55,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-12-03 16:55:55,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-12-03 16:55:55,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:55,285 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-12-03 16:55:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:55:55,468 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-12-03 16:55:55,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-12-03 16:55:55,468 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-12-03 16:55:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:55:55,469 INFO L225 Difference]: With dead ends: 96 [2018-12-03 16:55:55,469 INFO L226 Difference]: Without dead ends: 95 [2018-12-03 16:55:55,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 92 SyntacticMatches, 84 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:55:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-03 16:55:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-12-03 16:55:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-12-03 16:55:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-12-03 16:55:55,473 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-12-03 16:55:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:55:55,473 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-12-03 16:55:55,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-12-03 16:55:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-12-03 16:55:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-12-03 16:55:55,473 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:55:55,473 INFO L402 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-12-03 16:55:55,474 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:55:55,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:55:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash 854092103, now seen corresponding path program 92 times [2018-12-03 16:55:55,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:55:55,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:55,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:55:55,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:55:55,475 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:55:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:55:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:58,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:58,886 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:55:58,886 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:55:58,886 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:55:58,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:55:58,886 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:55:58,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:55:58,894 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:55:58,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-12-03 16:55:58,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:55:58,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:55:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:55:58,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:56:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:02,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:56:02,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 100 [2018-12-03 16:56:02,796 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:56:02,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-12-03 16:56:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-12-03 16:56:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:02,797 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-12-03 16:56:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:56:03,000 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-12-03 16:56:03,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 16:56:03,000 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-12-03 16:56:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:56:03,001 INFO L225 Difference]: With dead ends: 97 [2018-12-03 16:56:03,001 INFO L226 Difference]: Without dead ends: 96 [2018-12-03 16:56:03,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 93 SyntacticMatches, 86 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-03 16:56:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-12-03 16:56:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-03 16:56:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-12-03 16:56:03,005 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-12-03 16:56:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:56:03,005 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-12-03 16:56:03,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-12-03 16:56:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-12-03 16:56:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-03 16:56:03,006 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:56:03,006 INFO L402 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-12-03 16:56:03,006 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:56:03,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:56:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash 707051361, now seen corresponding path program 93 times [2018-12-03 16:56:03,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:56:03,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:03,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:56:03,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:03,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:56:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:06,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:06,214 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:56:06,214 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:56:06,214 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:56:06,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:06,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:56:06,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:56:06,222 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:56:06,273 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:56:06,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:56:06,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:56:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:06,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:56:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:10,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:56:10,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 100 [2018-12-03 16:56:10,050 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:56:10,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 16:56:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 16:56:10,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:10,052 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-12-03 16:56:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:56:10,273 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-12-03 16:56:10,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-12-03 16:56:10,273 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-12-03 16:56:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:56:10,274 INFO L225 Difference]: With dead ends: 98 [2018-12-03 16:56:10,274 INFO L226 Difference]: Without dead ends: 97 [2018-12-03 16:56:10,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 94 SyntacticMatches, 88 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4356 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-03 16:56:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-12-03 16:56:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-03 16:56:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-12-03 16:56:10,276 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-12-03 16:56:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:56:10,277 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-12-03 16:56:10,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 16:56:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-12-03 16:56:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-03 16:56:10,277 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:56:10,277 INFO L402 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-12-03 16:56:10,278 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:56:10,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:56:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 443755655, now seen corresponding path program 94 times [2018-12-03 16:56:10,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:56:10,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:10,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:56:10,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:10,279 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:56:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:13,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:13,907 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:56:13,907 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:56:13,907 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:56:13,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:13,908 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:56:13,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:56:13,920 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:56:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:13,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:56:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:13,998 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:56:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:17,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:56:17,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 100 [2018-12-03 16:56:17,703 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:56:17,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-12-03 16:56:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-12-03 16:56:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:17,704 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-12-03 16:56:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:56:17,915 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-12-03 16:56:17,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-03 16:56:17,916 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-12-03 16:56:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:56:17,917 INFO L225 Difference]: With dead ends: 99 [2018-12-03 16:56:17,917 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 16:56:17,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 95 SyntacticMatches, 90 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4455 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:17,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 16:56:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-12-03 16:56:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-12-03 16:56:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-12-03 16:56:17,921 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-12-03 16:56:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:56:17,921 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-12-03 16:56:17,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-12-03 16:56:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-12-03 16:56:17,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-03 16:56:17,922 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:56:17,922 INFO L402 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-12-03 16:56:17,922 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:56:17,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:56:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash 871523361, now seen corresponding path program 95 times [2018-12-03 16:56:17,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:56:17,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:17,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:56:17,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:17,923 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:56:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:21,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:21,139 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:56:21,139 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:56:21,139 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:56:21,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:21,140 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:56:21,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:56:21,149 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:56:21,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2018-12-03 16:56:21,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:56:21,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:56:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:21,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:56:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:24,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:56:24,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 100 [2018-12-03 16:56:24,966 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:56:24,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-12-03 16:56:24,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-12-03 16:56:24,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:24,967 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-12-03 16:56:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:56:25,093 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-12-03 16:56:25,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-12-03 16:56:25,094 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-12-03 16:56:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:56:25,095 INFO L225 Difference]: With dead ends: 100 [2018-12-03 16:56:25,095 INFO L226 Difference]: Without dead ends: 99 [2018-12-03 16:56:25,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 96 SyntacticMatches, 92 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-03 16:56:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-12-03 16:56:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 16:56:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-12-03 16:56:25,098 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-12-03 16:56:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:56:25,098 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-12-03 16:56:25,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-12-03 16:56:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-12-03 16:56:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 16:56:25,099 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:56:25,099 INFO L402 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-12-03 16:56:25,099 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:56:25,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:56:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420359, now seen corresponding path program 96 times [2018-12-03 16:56:25,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:56:25,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:25,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:56:25,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:25,101 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:56:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:28,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:28,604 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:56:28,604 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:56:28,604 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:56:28,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:28,604 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:56:28,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:56:28,613 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:56:28,671 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:56:28,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:56:28,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:56:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:28,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:56:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:32,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:56:32,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 100 [2018-12-03 16:56:32,133 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:56:32,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-12-03 16:56:32,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-12-03 16:56:32,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:32,134 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-12-03 16:56:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:56:32,360 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-12-03 16:56:32,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-12-03 16:56:32,360 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-12-03 16:56:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:56:32,361 INFO L225 Difference]: With dead ends: 101 [2018-12-03 16:56:32,362 INFO L226 Difference]: Without dead ends: 100 [2018-12-03 16:56:32,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 97 SyntacticMatches, 94 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4653 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-03 16:56:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-12-03 16:56:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-12-03 16:56:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-12-03 16:56:32,365 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-12-03 16:56:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:56:32,365 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-12-03 16:56:32,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-12-03 16:56:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-12-03 16:56:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-03 16:56:32,365 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:56:32,366 INFO L402 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-12-03 16:56:32,366 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:56:32,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:56:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash 15325409, now seen corresponding path program 97 times [2018-12-03 16:56:32,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:56:32,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:32,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:56:32,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:32,367 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:56:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:36,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:36,025 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:56:36,025 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:56:36,025 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:56:36,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:36,025 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:56:36,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:56:36,034 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:56:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:36,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:56:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:36,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:56:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:39,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:56:39,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 100 [2018-12-03 16:56:39,833 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:56:39,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 16:56:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 16:56:39,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:39,834 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-12-03 16:56:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:56:40,038 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-12-03 16:56:40,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-12-03 16:56:40,039 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-12-03 16:56:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:56:40,040 INFO L225 Difference]: With dead ends: 102 [2018-12-03 16:56:40,040 INFO L226 Difference]: Without dead ends: 101 [2018-12-03 16:56:40,040 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 96 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-12-03 16:56:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-12-03 16:56:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-12-03 16:56:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-12-03 16:56:40,044 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-12-03 16:56:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:56:40,044 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-12-03 16:56:40,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 16:56:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-12-03 16:56:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-12-03 16:56:40,044 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:56:40,044 INFO L402 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-12-03 16:56:40,045 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:56:40,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:56:40,045 INFO L82 PathProgramCache]: Analyzing trace with hash 475087623, now seen corresponding path program 98 times [2018-12-03 16:56:40,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:56:40,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:40,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:56:40,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:40,046 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:56:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:43,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:43,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:56:43,716 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:56:43,716 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:56:43,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:43,716 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:56:43,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:56:43,724 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:56:43,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-12-03 16:56:43,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:56:43,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:56:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:43,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:56:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:47,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:56:47,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 100 [2018-12-03 16:56:47,293 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:56:47,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-12-03 16:56:47,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-12-03 16:56:47,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:47,295 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-12-03 16:56:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:56:47,530 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-12-03 16:56:47,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-12-03 16:56:47,531 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-12-03 16:56:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:56:47,532 INFO L225 Difference]: With dead ends: 103 [2018-12-03 16:56:47,532 INFO L226 Difference]: Without dead ends: 102 [2018-12-03 16:56:47,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 99 SyntacticMatches, 98 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-12-03 16:56:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-12-03 16:56:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-12-03 16:56:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-12-03 16:56:47,536 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-12-03 16:56:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:56:47,536 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-12-03 16:56:47,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-12-03 16:56:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-12-03 16:56:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-03 16:56:47,537 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:56:47,537 INFO L402 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-12-03 16:56:47,537 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:56:47,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:56:47,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814369, now seen corresponding path program 99 times [2018-12-03 16:56:47,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:56:47,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:47,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:56:47,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:47,539 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:56:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:56:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:51,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:51,347 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:56:51,347 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:56:51,347 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:56:51,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:56:51,347 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:56:51,355 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:56:51,355 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:56:51,412 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:56:51,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:56:51,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:56:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:51,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:56:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:56:55,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:56:55,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 100 [2018-12-03 16:56:55,122 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:56:55,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-12-03 16:56:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-12-03 16:56:55,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:55,123 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-12-03 16:56:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:56:55,270 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-12-03 16:56:55,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-12-03 16:56:55,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-12-03 16:56:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:56:55,272 INFO L225 Difference]: With dead ends: 104 [2018-12-03 16:56:55,272 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 16:56:55,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 100 SyntacticMatches, 100 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 16:56:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 16:56:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-12-03 16:56:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-12-03 16:56:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-12-03 16:56:55,275 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-12-03 16:56:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:56:55,275 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-12-03 16:56:55,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-12-03 16:56:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-12-03 16:56:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-12-03 16:56:55,275 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:56:55,276 INFO L402 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-12-03 16:56:55,276 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:56:55,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:56:55,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670535, now seen corresponding path program 100 times [2018-12-03 16:56:55,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:56:55,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:55,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:56:55,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:56:55,277 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:56:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:57:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:57:00,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:57:00,507 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:57:00,507 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:57:00,507 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:57:00,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:57:00,508 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:57:00,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:57:00,518 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:57:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:57:00,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:57:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:57:00,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:57:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:57:01,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 16:57:01,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 101 [2018-12-03 16:57:01,028 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:57:01,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-12-03 16:57:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-12-03 16:57:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-12-03 16:57:01,029 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-12-03 16:57:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:57:07,367 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-12-03 16:57:07,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-12-03 16:57:07,368 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-12-03 16:57:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:57:07,369 INFO L225 Difference]: With dead ends: 105 [2018-12-03 16:57:07,369 INFO L226 Difference]: Without dead ends: 104 [2018-12-03 16:57:07,370 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-12-03 16:57:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-12-03 16:57:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-12-03 16:57:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 16:57:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-12-03 16:57:07,376 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-12-03 16:57:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:57:07,376 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-12-03 16:57:07,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-12-03 16:57:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-12-03 16:57:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 16:57:07,377 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:57:07,377 INFO L402 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-12-03 16:57:07,377 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:57:07,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:57:07,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080865, now seen corresponding path program 101 times [2018-12-03 16:57:07,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:57:07,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:57:07,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:57:07,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:57:07,379 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:57:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:57:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:57:12,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:57:12,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-12-03 16:57:12,028 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:57:12,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 16:57:12,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 16:57:12,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 16:57:12,030 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-12-03 16:57:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:57:12,216 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-12-03 16:57:12,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-12-03 16:57:12,217 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-12-03 16:57:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:57:12,217 INFO L225 Difference]: With dead ends: 104 [2018-12-03 16:57:12,217 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 16:57:12,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 16:57:12,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 16:57:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 16:57:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 16:57:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 16:57:12,220 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2018-12-03 16:57:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:57:12,220 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 16:57:12,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 16:57:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 16:57:12,221 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 16:57:12,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 16:57:12,352 WARN L180 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2018-12-03 16:57:14,076 WARN L180 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 610 [2018-12-03 16:57:14,083 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 17 31) no Hoare annotation was computed. [2018-12-03 16:57:14,083 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 17 31) no Hoare annotation was computed. [2018-12-03 16:57:14,083 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 17 31) no Hoare annotation was computed. [2018-12-03 16:57:14,086 INFO L444 ceAbstractionStarter]: At program point L24-1(lines 24 27) the Hoare annotation is: (or (and (<= main_x 49) (<= main_y 49) (<= 49 main_x) (<= 49 main_y)) (and (<= 8 main_y) (<= main_y 8) (<= main_x 8) (<= 8 main_x)) (and (<= 99 main_x) (<= main_y 99) (<= 99 main_y) (<= main_x 99)) (and (<= 42 main_x) (<= main_y 42) (<= main_x 42) (<= 42 main_y)) (and (<= 59 main_x) (<= 59 main_y) (<= main_y 59) (<= main_x 59)) (and (<= 9 main_y) (<= 9 main_x) (<= main_x 9) (<= main_y 9)) (and (<= 55 main_y) (<= main_y 55) (<= 55 main_x) (<= main_x 55)) (and (<= 74 main_x) (<= main_x 74) (<= 74 main_y) (<= main_y 74)) (and (<= main_x 97) (<= 97 main_y) (<= main_y 97) (<= 97 main_x)) (and (<= 12 main_x) (<= 12 main_y) (<= main_y 12) (<= main_x 12)) (and (<= main_x 65) (<= main_y 65) (<= 65 main_x) (<= 65 main_y)) (and (<= 32 main_x) (<= main_x 32) (<= 32 main_y) (<= main_y 32)) (and (<= main_y 73) (<= main_x 73) (<= 73 main_x) (<= 73 main_y)) (and (<= 6 main_x) (<= main_x 6) (<= 6 main_y) (<= main_y 6)) (and (<= 14 main_x) (<= 14 main_y) (<= main_y 14) (<= main_x 14)) (and (<= main_x 0) (<= 0 main_y) (<= 0 main_x) (<= main_y 0)) (and (<= main_y 44) (<= main_x 44) (<= 44 main_y) (<= 44 main_x)) (and (<= 38 main_x) (<= 38 main_y) (<= main_y 38) (<= main_x 38)) (and (<= 43 main_x) (<= main_x 43) (<= main_y 43) (<= 43 main_y)) (and (<= 21 main_y) (<= 21 main_x) (<= main_x 21) (<= main_y 21)) (and (<= 94 main_x) (<= 94 main_y) (<= main_x 94) (<= main_y 94)) (and (<= 52 main_x) (<= 52 main_y) (<= main_y 52) (<= main_x 52)) (and (<= main_y 46) (<= 46 main_x) (<= main_x 46) (<= 46 main_y)) (and (<= main_x 18) (<= 18 main_y) (<= 18 main_x) (<= main_y 18)) (and (<= 61 main_y) (<= main_x 61) (<= main_y 61) (<= 61 main_x)) (<= 101 main_x) (and (<= 88 main_y) (<= main_y 88) (<= 88 main_x) (<= main_x 88)) (and (<= 80 main_y) (<= main_x 80) (<= main_y 80) (<= 80 main_x)) (and (<= main_x 92) (<= 92 main_y) (<= main_y 92) (<= 92 main_x)) (and (<= 87 main_x) (<= main_x 87) (<= 87 main_y) (<= main_y 87)) (and (<= 35 main_y) (<= main_y 35) (<= main_x 35) (<= 35 main_x)) (and (<= 85 main_x) (<= main_x 85) (<= 85 main_y) (<= main_y 85)) (and (<= 63 main_x) (<= 63 main_y) (<= main_y 63) (<= main_x 63)) (and (<= 15 main_y) (<= main_y 15) (<= 15 main_x) (<= main_x 15)) (and (<= main_y 64) (<= 64 main_x) (<= main_x 64) (<= 64 main_y)) (and (<= 47 main_x) (<= 47 main_y) (<= main_y 47) (<= main_x 47)) (and (<= 51 main_y) (<= main_x 51) (<= 51 main_x) (<= main_y 51)) (and (<= 4 main_y) (<= main_y 4) (<= main_x 4) (<= 4 main_x)) (and (<= 54 main_y) (<= main_y 54) (<= 54 main_x) (<= main_x 54)) (and (<= main_x 33) (<= 33 main_x) (<= main_y 33) (<= 33 main_y)) (and (<= 37 main_x) (<= 37 main_y) (<= main_y 37) (<= main_x 37)) (and (<= 20 main_y) (<= 20 main_x) (<= main_y 20) (<= main_x 20)) (and (<= 26 main_y) (<= main_x 26) (<= 26 main_x) (<= main_y 26)) (and (<= 86 main_x) (<= 86 main_y) (<= main_x 86) (<= main_y 86)) (and (<= main_x 27) (<= main_y 27) (<= 27 main_y) (<= 27 main_x)) (and (<= main_y 95) (<= 95 main_x) (<= 95 main_y) (<= main_x 95)) (and (<= main_x 56) (<= 56 main_x) (<= 56 main_y) (<= main_y 56)) (and (<= 1 main_x) (<= main_x 1) (<= main_y 1) (<= 1 main_y)) (and (<= main_y 75) (<= main_x 75) (<= 75 main_y) (<= 75 main_x)) (and (<= main_x 62) (<= 62 main_x) (<= 62 main_y) (<= main_y 62)) (and (<= 68 main_y) (<= main_x 68) (<= main_y 68) (<= 68 main_x)) (and (<= main_y 78) (<= 78 main_x) (<= 78 main_y) (<= main_x 78)) (and (<= main_y 3) (<= 3 main_y) (<= 3 main_x) (<= main_x 3)) (and (<= main_x 25) (<= main_y 25) (<= 25 main_x) (<= 25 main_y)) (and (<= main_x 36) (<= main_y 36) (<= 36 main_x) (<= 36 main_y)) (and (<= 57 main_y) (<= main_x 57) (<= main_y 57) (<= 57 main_x)) (and (<= 5 main_x) (<= main_x 5) (<= main_y 5) (<= 5 main_y)) (and (<= main_y 17) (<= 17 main_y) (<= 17 main_x) (<= main_x 17)) (and (<= 82 main_x) (<= 82 main_y) (<= main_x 82) (<= main_y 82)) (and (<= main_y 83) (<= 83 main_x) (<= main_x 83) (<= 83 main_y)) (and (<= 77 main_x) (<= 77 main_y) (<= main_x 77) (<= main_y 77)) (and (<= 31 main_x) (<= 31 main_y) (<= main_y 31) (<= main_x 31)) (and (<= main_y 98) (<= main_x 98) (<= 98 main_y) (<= 98 main_x)) (and (<= 71 main_y) (<= 71 main_x) (<= main_y 71) (<= main_x 71)) (and (<= main_y 41) (<= 41 main_x) (<= 41 main_y) (<= main_x 41)) (and (<= 30 main_x) (<= 30 main_y) (<= main_x 30) (<= main_y 30)) (and (<= 24 main_y) (<= main_x 24) (<= main_y 24) (<= 24 main_x)) (and (<= main_y 50) (<= 50 main_y) (<= main_x 50) (<= 50 main_x)) (and (<= 84 main_y) (<= main_y 84) (<= main_x 84) (<= 84 main_x)) (and (<= main_y 93) (<= 93 main_y) (<= 93 main_x) (<= main_x 93)) (and (<= main_y 60) (<= main_x 60) (<= 60 main_y) (<= 60 main_x)) (and (<= 29 main_y) (<= main_x 29) (<= 29 main_x) (<= main_y 29)) (and (<= main_y 40) (<= main_x 40) (<= 40 main_y) (<= 40 main_x)) (and (<= main_y 53) (<= 53 main_y) (<= main_x 53) (<= 53 main_x)) (and (<= main_y 58) (<= 58 main_y) (<= 58 main_x) (<= main_x 58)) (and (<= 67 main_x) (<= 67 main_y) (<= main_y 67) (<= main_x 67)) (and (<= main_y 22) (<= main_x 22) (<= 22 main_x) (<= 22 main_y)) (and (<= 39 main_y) (<= 39 main_x) (<= main_x 39) (<= main_y 39)) (and (<= 13 main_x) (<= main_x 13) (<= main_y 13) (<= 13 main_y)) (and (<= main_y 79) (<= 79 main_x) (<= main_x 79) (<= 79 main_y)) (and (<= 69 main_x) (<= main_x 69) (<= 69 main_y) (<= main_y 69)) (and (<= 81 main_x) (<= main_y 81) (<= main_x 81) (<= 81 main_y)) (and (<= 28 main_y) (<= main_x 28) (<= 28 main_x) (<= main_y 28)) (and (<= main_y 66) (<= main_x 66) (<= 66 main_x) (<= 66 main_y)) (and (<= main_x 91) (<= 91 main_y) (<= 91 main_x) (<= main_y 91)) (and (<= 34 main_x) (<= main_y 34) (<= main_x 34) (<= 34 main_y)) (and (<= 89 main_x) (<= main_y 89) (<= main_x 89) (<= 89 main_y)) (and (<= 10 main_y) (<= main_x 10) (<= main_y 10) (<= 10 main_x)) (and (<= main_x 16) (<= main_y 16) (<= 16 main_x) (<= 16 main_y)) (and (<= 100 main_x) (<= main_y 100) (< 99 main_y)) (and (<= 2 main_y) (<= 2 main_x) (<= main_y 2) (<= main_x 2)) (and (<= main_x 7) (<= 7 main_y) (<= 7 main_x) (<= main_y 7)) (and (<= main_x 72) (<= 72 main_x) (<= 72 main_y) (<= main_y 72)) (and (<= 48 main_x) (<= main_x 48) (<= main_y 48) (<= 48 main_y)) (and (<= main_y 76) (<= main_x 76) (<= 76 main_y) (<= 76 main_x)) (and (<= 96 main_x) (<= main_y 96) (<= 96 main_y) (<= main_x 96)) (and (<= 45 main_x) (<= 45 main_y) (<= main_y 45) (<= main_x 45)) (and (<= 11 main_x) (<= main_x 11) (<= 11 main_y) (<= main_y 11)) (and (<= main_x 19) (<= main_y 19) (<= 19 main_x) (<= 19 main_y)) (and (<= 90 main_x) (<= main_y 90) (<= 90 main_y) (<= main_x 90)) (and (<= main_x 70) (<= main_y 70) (<= 70 main_x) (<= 70 main_y)) (and (<= 23 main_x) (<= 23 main_y) (<= main_y 23) (<= main_x 23))) [2018-12-03 16:57:14,086 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 29) no Hoare annotation was computed. [2018-12-03 16:57:14,116 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 04:57:14 BoogieIcfgContainer [2018-12-03 16:57:14,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 16:57:14,117 INFO L168 Benchmark]: Toolchain (without parser) took 405988.56 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 542.6 MB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -543.6 MB). Peak memory consumption was 491.4 MB. Max. memory is 7.1 GB. [2018-12-03 16:57:14,118 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:57:14,118 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:57:14,118 INFO L168 Benchmark]: Boogie Preprocessor took 20.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:57:14,118 INFO L168 Benchmark]: RCFGBuilder took 266.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 16:57:14,119 INFO L168 Benchmark]: TraceAbstraction took 405661.42 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 542.6 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -564.7 MB). Peak memory consumption was 470.3 MB. Max. memory is 7.1 GB. [2018-12-03 16:57:14,121 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 266.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 405661.42 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 542.6 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -564.7 MB). Peak memory consumption was 470.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 49 && y <= 49) && 49 <= x) && 49 <= y) || (((8 <= y && y <= 8) && x <= 8) && 8 <= x)) || (((99 <= x && y <= 99) && 99 <= y) && x <= 99)) || (((42 <= x && y <= 42) && x <= 42) && 42 <= y)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((9 <= y && 9 <= x) && x <= 9) && y <= 9)) || (((55 <= y && y <= 55) && 55 <= x) && x <= 55)) || (((74 <= x && x <= 74) && 74 <= y) && y <= 74)) || (((x <= 97 && 97 <= y) && y <= 97) && 97 <= x)) || (((12 <= x && 12 <= y) && y <= 12) && x <= 12)) || (((x <= 65 && y <= 65) && 65 <= x) && 65 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((y <= 73 && x <= 73) && 73 <= x) && 73 <= y)) || (((6 <= x && x <= 6) && 6 <= y) && y <= 6)) || (((14 <= x && 14 <= y) && y <= 14) && x <= 14)) || (((x <= 0 && 0 <= y) && 0 <= x) && y <= 0)) || (((y <= 44 && x <= 44) && 44 <= y) && 44 <= x)) || (((38 <= x && 38 <= y) && y <= 38) && x <= 38)) || (((43 <= x && x <= 43) && y <= 43) && 43 <= y)) || (((21 <= y && 21 <= x) && x <= 21) && y <= 21)) || (((94 <= x && 94 <= y) && x <= 94) && y <= 94)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((y <= 46 && 46 <= x) && x <= 46) && 46 <= y)) || (((x <= 18 && 18 <= y) && 18 <= x) && y <= 18)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || 101 <= x) || (((88 <= y && y <= 88) && 88 <= x) && x <= 88)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 92 && 92 <= y) && y <= 92) && 92 <= x)) || (((87 <= x && x <= 87) && 87 <= y) && y <= 87)) || (((35 <= y && y <= 35) && x <= 35) && 35 <= x)) || (((85 <= x && x <= 85) && 85 <= y) && y <= 85)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((15 <= y && y <= 15) && 15 <= x) && x <= 15)) || (((y <= 64 && 64 <= x) && x <= 64) && 64 <= y)) || (((47 <= x && 47 <= y) && y <= 47) && x <= 47)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((4 <= y && y <= 4) && x <= 4) && 4 <= x)) || (((54 <= y && y <= 54) && 54 <= x) && x <= 54)) || (((x <= 33 && 33 <= x) && y <= 33) && 33 <= y)) || (((37 <= x && 37 <= y) && y <= 37) && x <= 37)) || (((20 <= y && 20 <= x) && y <= 20) && x <= 20)) || (((26 <= y && x <= 26) && 26 <= x) && y <= 26)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((y <= 95 && 95 <= x) && 95 <= y) && x <= 95)) || (((x <= 56 && 56 <= x) && 56 <= y) && y <= 56)) || (((1 <= x && x <= 1) && y <= 1) && 1 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 62 && 62 <= x) && 62 <= y) && y <= 62)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 78 && 78 <= x) && 78 <= y) && x <= 78)) || (((y <= 3 && 3 <= y) && 3 <= x) && x <= 3)) || (((x <= 25 && y <= 25) && 25 <= x) && 25 <= y)) || (((x <= 36 && y <= 36) && 36 <= x) && 36 <= y)) || (((57 <= y && x <= 57) && y <= 57) && 57 <= x)) || (((5 <= x && x <= 5) && y <= 5) && 5 <= y)) || (((y <= 17 && 17 <= y) && 17 <= x) && x <= 17)) || (((82 <= x && 82 <= y) && x <= 82) && y <= 82)) || (((y <= 83 && 83 <= x) && x <= 83) && 83 <= y)) || (((77 <= x && 77 <= y) && x <= 77) && y <= 77)) || (((31 <= x && 31 <= y) && y <= 31) && x <= 31)) || (((y <= 98 && x <= 98) && 98 <= y) && 98 <= x)) || (((71 <= y && 71 <= x) && y <= 71) && x <= 71)) || (((y <= 41 && 41 <= x) && 41 <= y) && x <= 41)) || (((30 <= x && 30 <= y) && x <= 30) && y <= 30)) || (((24 <= y && x <= 24) && y <= 24) && 24 <= x)) || (((y <= 50 && 50 <= y) && x <= 50) && 50 <= x)) || (((84 <= y && y <= 84) && x <= 84) && 84 <= x)) || (((y <= 93 && 93 <= y) && 93 <= x) && x <= 93)) || (((y <= 60 && x <= 60) && 60 <= y) && 60 <= x)) || (((29 <= y && x <= 29) && 29 <= x) && y <= 29)) || (((y <= 40 && x <= 40) && 40 <= y) && 40 <= x)) || (((y <= 53 && 53 <= y) && x <= 53) && 53 <= x)) || (((y <= 58 && 58 <= y) && 58 <= x) && x <= 58)) || (((67 <= x && 67 <= y) && y <= 67) && x <= 67)) || (((y <= 22 && x <= 22) && 22 <= x) && 22 <= y)) || (((39 <= y && 39 <= x) && x <= 39) && y <= 39)) || (((13 <= x && x <= 13) && y <= 13) && 13 <= y)) || (((y <= 79 && 79 <= x) && x <= 79) && 79 <= y)) || (((69 <= x && x <= 69) && 69 <= y) && y <= 69)) || (((81 <= x && y <= 81) && x <= 81) && 81 <= y)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((y <= 66 && x <= 66) && 66 <= x) && 66 <= y)) || (((x <= 91 && 91 <= y) && 91 <= x) && y <= 91)) || (((34 <= x && y <= 34) && x <= 34) && 34 <= y)) || (((89 <= x && y <= 89) && x <= 89) && 89 <= y)) || (((10 <= y && x <= 10) && y <= 10) && 10 <= x)) || (((x <= 16 && y <= 16) && 16 <= x) && 16 <= y)) || ((100 <= x && y <= 100) && 99 < y)) || (((2 <= y && 2 <= x) && y <= 2) && x <= 2)) || (((x <= 7 && 7 <= y) && 7 <= x) && y <= 7)) || (((x <= 72 && 72 <= x) && 72 <= y) && y <= 72)) || (((48 <= x && x <= 48) && y <= 48) && 48 <= y)) || (((y <= 76 && x <= 76) && 76 <= y) && 76 <= x)) || (((96 <= x && y <= 96) && 96 <= y) && x <= 96)) || (((45 <= x && 45 <= y) && y <= 45) && x <= 45)) || (((11 <= x && x <= 11) && 11 <= y) && y <= 11)) || (((x <= 19 && y <= 19) && 19 <= x) && 19 <= y)) || (((90 <= x && y <= 90) && 90 <= y) && x <= 90)) || (((x <= 70 && y <= 70) && 70 <= x) && 70 <= y)) || (((23 <= x && 23 <= y) && y <= 23) && x <= 23) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 405.5s OverallTime, 102 OverallIterations, 101 TraceHistogramMax, 19.3s AutomataDifference, 0.0s DeadEndRemovalTime, 1.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 204 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 19496 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15553 GetRequests, 5247 SyntacticMatches, 2554 SemanticMatches, 7752 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126225 ImplicationChecksByTransitivity, 370.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 102 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1314 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 375.0s InterpolantComputationTime, 10605 NumberOfCodeBlocks, 10605 NumberOfCodeBlocksAsserted, 1068 NumberOfCheckSat, 15553 ConstructedInterpolants, 0 QuantifiedInterpolants, 3290577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 21100 ConjunctsInSsa, 5351 ConjunctsInUnsatCore, 302 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/520251 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...