java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0302a3f [2019-02-25 15:10:23,710 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-25 15:10:23,712 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-25 15:10:23,730 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-02-25 15:10:23,781 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-02-25 15:10:23,799 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-25 15:10:23,800 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-25 15:10:23,800 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-25 15:10:23,801 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-25 15:10:23,801 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-25 15:10:23,801 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-25 15:10:23,801 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-25 15:10:23,801 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-25 15:10:23,801 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-25 15:10:23,802 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-25 15:10:23,802 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-25 15:10:23,802 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-25 15:10:23,802 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-25 15:10:23,802 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-25 15:10:23,803 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-25 15:10:23,804 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-25 15:10:23,804 INFO L133 SettingsManager]: * Use SBE=true [2019-02-25 15:10:23,804 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-25 15:10:23,804 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-25 15:10:23,804 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-25 15:10:23,805 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-25 15:10:23,805 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-25 15:10:23,805 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-25 15:10:23,805 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-25 15:10:23,805 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-25 15:10:23,805 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-25 15:10:23,806 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-25 15:10:23,806 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-25 15:10:23,806 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-25 15:10:23,806 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-25 15:10:23,806 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-25 15:10:23,807 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-02-25 15:10:23,807 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-25 15:10:23,807 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-25 15:10:23,807 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-25 15:10:23,807 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-25 15:10:23,807 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-25 15:10:23,808 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-02-25 15:10:23,808 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-25 15:10:23,808 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-25 15:10:23,848 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-25 15:10:23,858 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-25 15:10:23,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-25 15:10:23,863 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-25 15:10:23,864 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-25 15:10:23,864 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl [2019-02-25 15:10:23,865 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl' [2019-02-25 15:10:23,897 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-25 15:10:23,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-25 15:10:23,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-25 15:10:23,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-25 15:10:23,899 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-25 15:10:23,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-25 15:10:23,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-25 15:10:23,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-25 15:10:23,937 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-25 15:10:23,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/1) ... [2019-02-25 15:10:23,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-25 15:10:23,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-25 15:10:23,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-25 15:10:23,959 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-25 15:10:23,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (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 [2019-02-25 15:10:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-25 15:10:24,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-25 15:10:24,266 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-25 15:10:24,266 INFO L286 CfgBuilder]: Removed 1 assue(true) statements. [2019-02-25 15:10:24,268 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.02 03:10:24 BoogieIcfgContainer [2019-02-25 15:10:24,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-25 15:10:24,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-25 15:10:24,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-25 15:10:24,274 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-25 15:10:24,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:10:23" (1/2) ... [2019-02-25 15:10:24,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a48ec13 and model type n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.02 03:10:24, skipping insertion in model container [2019-02-25 15:10:24,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.02 03:10:24" (2/2) ... [2019-02-25 15:10:24,278 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11.i_3.bpl [2019-02-25 15:10:24,288 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-25 15:10:24,296 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-02-25 15:10:24,313 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-02-25 15:10:24,341 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-25 15:10:24,341 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-25 15:10:24,342 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-25 15:10:24,342 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-25 15:10:24,342 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-25 15:10:24,342 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-25 15:10:24,342 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-25 15:10:24,342 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-25 15:10:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-02-25 15:10:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-25 15:10:24,362 INFO L394 BasicCegarLoop]: Found error trace [2019-02-25 15:10:24,363 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-25 15:10:24,365 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-02-25 15:10:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:10:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2019-02-25 15:10:24,373 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-25 15:10:24,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:24,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-25 15:10:24,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:24,417 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-25 15:10:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:10:24,718 WARN L181 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-02-25 15:10:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:24,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-25 15:10:24,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-02-25 15:10:24,723 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-25 15:10:24,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-25 15:10:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-25 15:10:24,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-25 15:10:24,742 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-02-25 15:10:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-25 15:10:24,775 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-02-25 15:10:24,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-25 15:10:24,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-25 15:10:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-25 15:10:24,787 INFO L225 Difference]: With dead ends: 9 [2019-02-25 15:10:24,788 INFO L226 Difference]: Without dead ends: 5 [2019-02-25 15:10:24,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-25 15:10:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-02-25 15:10:24,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-02-25 15:10:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-02-25 15:10:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-02-25 15:10:24,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-02-25 15:10:24,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-25 15:10:24,822 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-02-25 15:10:24,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-25 15:10:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-02-25 15:10:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-25 15:10:24,823 INFO L394 BasicCegarLoop]: Found error trace [2019-02-25 15:10:24,824 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-25 15:10:24,824 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-02-25 15:10:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:10:24,825 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2019-02-25 15:10:24,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-25 15:10:24,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:24,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-25 15:10:24,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:24,827 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-25 15:10:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:10:25,181 WARN L181 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2019-02-25 15:10:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:25,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:10:25,183 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-25 15:10:25,184 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-25 15:10:25,188 INFO L207 CegarAbsIntRunner]: [0], [5], [7], [9] [2019-02-25 15:10:25,230 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-25 15:10:25,230 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-25 15:10:25,385 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-25 15:10:25,386 INFO L272 AbstractInterpreter]: Visited 4 different actions 13 times. Merged at 3 different actions 9 times. Widened at 1 different actions 1 times. Performed 134 root evaluator evaluations with a maximum evaluation depth of 5. Performed 134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-25 15:10:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:10:25,407 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-25 15:10:25,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:10:25,407 INFO L193 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 [2019-02-25 15:10:25,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-25 15:10:25,420 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-25 15:10:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:10:25,440 WARN L254 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 10 conjunts are in the unsatisfiable core [2019-02-25 15:10:25,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-25 15:10:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:25,508 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-25 15:10:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:25,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-25 15:10:25,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-02-25 15:10:25,593 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-25 15:10:25,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-02-25 15:10:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-02-25 15:10:25,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-25 15:10:25,595 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2019-02-25 15:10:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-25 15:10:25,630 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-02-25 15:10:25,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-25 15:10:25,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-02-25 15:10:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-25 15:10:25,632 INFO L225 Difference]: With dead ends: 8 [2019-02-25 15:10:25,632 INFO L226 Difference]: Without dead ends: 6 [2019-02-25 15:10:25,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-25 15:10:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-02-25 15:10:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-02-25 15:10:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-02-25 15:10:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-02-25 15:10:25,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-02-25 15:10:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-25 15:10:25,637 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-02-25 15:10:25,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-02-25 15:10:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-02-25 15:10:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-25 15:10:25,638 INFO L394 BasicCegarLoop]: Found error trace [2019-02-25 15:10:25,638 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-02-25 15:10:25,638 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-02-25 15:10:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:10:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2019-02-25 15:10:25,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-25 15:10:25,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:25,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-25 15:10:25,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:25,640 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-25 15:10:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:10:25,927 WARN L181 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2019-02-25 15:10:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:25,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:10:25,929 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-25 15:10:25,929 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-25 15:10:25,930 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-25 15:10:25,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:10:25,930 INFO L193 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 [2019-02-25 15:10:25,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-25 15:10:25,952 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-25 15:10:25,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-02-25 15:10:25,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-25 15:10:25,971 WARN L254 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 12 conjunts are in the unsatisfiable core [2019-02-25 15:10:25,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-25 15:10:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:26,015 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-25 15:10:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:26,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-25 15:10:26,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2019-02-25 15:10:26,193 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-25 15:10:26,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-25 15:10:26,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-25 15:10:26,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-02-25 15:10:26,195 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2019-02-25 15:10:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-25 15:10:26,240 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-02-25 15:10:26,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-25 15:10:26,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-02-25 15:10:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-25 15:10:26,241 INFO L225 Difference]: With dead ends: 9 [2019-02-25 15:10:26,241 INFO L226 Difference]: Without dead ends: 7 [2019-02-25 15:10:26,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-02-25 15:10:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-02-25 15:10:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-02-25 15:10:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-02-25 15:10:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-02-25 15:10:26,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-02-25 15:10:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-25 15:10:26,246 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-02-25 15:10:26,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-25 15:10:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-02-25 15:10:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-25 15:10:26,247 INFO L394 BasicCegarLoop]: Found error trace [2019-02-25 15:10:26,247 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-02-25 15:10:26,247 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-02-25 15:10:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:10:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2019-02-25 15:10:26,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-25 15:10:26,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:26,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-25 15:10:26,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:26,249 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-25 15:10:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:10:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:26,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:10:26,477 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-25 15:10:26,477 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-25 15:10:26,478 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-25 15:10:26,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:10:26,478 INFO L193 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 [2019-02-25 15:10:26,488 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-25 15:10:26,488 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-25 15:10:26,521 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-25 15:10:26,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-25 15:10:26,522 WARN L254 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 14 conjunts are in the unsatisfiable core [2019-02-25 15:10:26,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-25 15:10:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:26,655 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-25 15:10:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:26,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-25 15:10:26,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2019-02-25 15:10:26,774 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-25 15:10:26,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-02-25 15:10:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-02-25 15:10:26,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-02-25 15:10:26,775 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2019-02-25 15:10:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-25 15:10:26,811 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-02-25 15:10:26,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-25 15:10:26,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-02-25 15:10:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-25 15:10:26,812 INFO L225 Difference]: With dead ends: 10 [2019-02-25 15:10:26,812 INFO L226 Difference]: Without dead ends: 8 [2019-02-25 15:10:26,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-02-25 15:10:26,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-02-25 15:10:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-02-25 15:10:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-02-25 15:10:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-02-25 15:10:26,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-02-25 15:10:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-25 15:10:26,816 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-02-25 15:10:26,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-02-25 15:10:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-02-25 15:10:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-25 15:10:26,816 INFO L394 BasicCegarLoop]: Found error trace [2019-02-25 15:10:26,816 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2019-02-25 15:10:26,817 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-02-25 15:10:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:10:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2019-02-25 15:10:26,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-25 15:10:26,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:26,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-25 15:10:26,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:10:26,818 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-25 15:10:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:10:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:27,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:10:27,231 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-25 15:10:27,231 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-25 15:10:27,231 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-25 15:10:27,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:10:27,231 INFO L193 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 [2019-02-25 15:10:27,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-25 15:10:27,241 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-25 15:10:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:10:27,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 16 conjunts are in the unsatisfiable core [2019-02-25 15:10:27,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-25 15:10:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:27,303 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-25 15:10:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:10:27,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-25 15:10:27,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2019-02-25 15:10:27,437 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-25 15:10:27,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-25 15:10:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-25 15:10:27,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-02-25 15:10:27,438 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2019-02-25 15:10:27,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-25 15:10:27,481 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-02-25 15:10:27,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-25 15:10:27,485 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-02-25 15:10:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-25 15:10:27,485 INFO L225 Difference]: With dead ends: 9 [2019-02-25 15:10:27,485 INFO L226 Difference]: Without dead ends: 0 [2019-02-25 15:10:27,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-02-25 15:10:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-02-25 15:10:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-02-25 15:10:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-02-25 15:10:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-02-25 15:10:27,486 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2019-02-25 15:10:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-25 15:10:27,487 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-02-25 15:10:27,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-25 15:10:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-02-25 15:10:27,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-02-25 15:10:27,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-02-25 15:10:27,637 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2019-02-25 15:10:27,638 INFO L444 ceAbstractionStarter]: At program point L31(lines 31 41) the Hoare annotation is: false [2019-02-25 15:10:27,638 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 43) no Hoare annotation was computed. [2019-02-25 15:10:27,638 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2019-02-25 15:10:27,638 INFO L444 ceAbstractionStarter]: At program point L40(lines 17 40) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5)) (and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1)) (and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5)) (and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5)) (and (<= 4 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 4))) [2019-02-25 15:10:27,638 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 42) no Hoare annotation was computed. [2019-02-25 15:10:27,647 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.02 03:10:27 BoogieIcfgContainer [2019-02-25 15:10:27,647 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-02-25 15:10:27,648 INFO L168 Benchmark]: Toolchain (without parser) took 3751.17 ms. Allocated memory was 141.0 MB in the beginning and 220.2 MB in the end (delta: 79.2 MB). Free memory was 108.5 MB in the beginning and 200.6 MB in the end (delta: -92.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-02-25 15:10:27,649 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 141.0 MB. Free memory is still 109.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-25 15:10:27,650 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.54 ms. Allocated memory is still 141.0 MB. Free memory was 108.3 MB in the beginning and 106.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2019-02-25 15:10:27,651 INFO L168 Benchmark]: Boogie Preprocessor took 21.98 ms. Allocated memory is still 141.0 MB. Free memory was 106.7 MB in the beginning and 105.8 MB in the end (delta: 966.9 kB). Peak memory consumption was 966.9 kB. Max. memory is 7.1 GB. [2019-02-25 15:10:27,652 INFO L168 Benchmark]: RCFGBuilder took 310.33 ms. Allocated memory is still 141.0 MB. Free memory was 105.5 MB in the beginning and 96.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-02-25 15:10:27,653 INFO L168 Benchmark]: TraceAbstraction took 3377.32 ms. Allocated memory was 141.0 MB in the beginning and 220.2 MB in the end (delta: 79.2 MB). Free memory was 96.4 MB in the beginning and 200.6 MB in the end (delta: -104.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-02-25 15:10:27,657 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 0.16 ms. Allocated memory is still 141.0 MB. Free memory is still 109.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.54 ms. Allocated memory is still 141.0 MB. Free memory was 108.3 MB in the beginning and 106.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.98 ms. Allocated memory is still 141.0 MB. Free memory was 106.7 MB in the beginning and 105.8 MB in the end (delta: 966.9 kB). Peak memory consumption was 966.9 kB. Max. memory is 7.1 GB. * RCFGBuilder took 310.33 ms. Allocated memory is still 141.0 MB. Free memory was 105.5 MB in the beginning and 96.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3377.32 ms. Allocated memory was 141.0 MB in the beginning and 220.2 MB in the end (delta: 79.2 MB). Free memory was 96.4 MB in the beginning and 200.6 MB in the end (delta: -104.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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: 31]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((main_~len~5 <= 0 && 0 <= main_~len~5) || (1 <= main_~len~5 && main_~len~5 <= 1)) || (main_~len~5 <= 2 && 2 <= main_~len~5)) || (main_~len~5 <= 3 && 3 <= main_~len~5)) || (4 <= main_~len~5 && main_~len~5 <= 4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 3.3s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 72 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=4, 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: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 37 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 1534 SizeOfPredicates, 12 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/60 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...