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/nonlinear/Power3-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 17:03:15,569 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 17:03:15,571 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 17:03:15,584 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 17:03:15,584 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 17:03:15,585 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 17:03:15,587 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 17:03:15,589 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 17:03:15,590 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 17:03:15,591 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 17:03:15,592 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 17:03:15,592 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 17:03:15,593 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 17:03:15,594 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 17:03:15,595 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 17:03:15,596 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 17:03:15,597 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 17:03:15,599 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 17:03:15,601 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 17:03:15,602 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 17:03:15,603 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 17:03:15,604 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 17:03:15,607 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-12-03 17:03:15,622 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 17:03:15,646 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 17:03:15,646 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 17:03:15,647 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 17:03:15,647 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 17:03:15,647 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 17:03:15,647 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 17:03:15,647 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 17:03:15,648 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 17:03:15,648 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 17:03:15,649 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 17:03:15,649 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 17:03:15,649 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 17:03:15,649 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 17:03:15,649 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 17:03:15,650 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 17:03:15,650 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 17:03:15,652 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 17:03:15,652 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 17:03:15,653 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 17:03:15,653 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 17:03:15,653 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 17:03:15,653 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 17:03:15,653 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 17:03:15,654 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 17:03:15,654 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 17:03:15,654 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 17:03:15,654 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 17:03:15,655 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 17:03:15,655 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 17:03:15,655 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 17:03:15,655 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 17:03:15,656 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 17:03:15,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 17:03:15,656 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 17:03:15,656 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 17:03:15,656 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 17:03:15,657 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 17:03:15,657 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 17:03:15,657 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 17:03:15,657 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 17:03:15,657 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 17:03:15,700 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 17:03:15,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 17:03:15,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 17:03:15,723 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 17:03:15,723 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 17:03:15,724 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Power3-Safe.bpl [2018-12-03 17:03:15,724 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Power3-Safe.bpl' [2018-12-03 17:03:15,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 17:03:15,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 17:03:15,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 17:03:15,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 17:03:15,769 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 17:03:15,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,806 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 17:03:15,806 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 17:03:15,806 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 17:03:15,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 17:03:15,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 17:03:15,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 17:03:15,810 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 17:03:15,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/1) ... [2018-12-03 17:03:15,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 17:03:15,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 17:03:15,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 17:03:15,839 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 17:03:15,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (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 17:03:15,916 INFO L124 BoogieDeclarations]: Specification and implementation of procedure power given in one single declaration [2018-12-03 17:03:15,917 INFO L130 BoogieDeclarations]: Found specification of procedure power [2018-12-03 17:03:15,917 INFO L138 BoogieDeclarations]: Found implementation of procedure power [2018-12-03 17:03:15,992 WARN L615 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-12-03 17:03:16,105 INFO L272 CfgBuilder]: Using library mode [2018-12-03 17:03:16,105 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 17:03:16,106 INFO L202 PluginConnector]: Adding new model Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:03:16 BoogieIcfgContainer [2018-12-03 17:03:16,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 17:03:16,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 17:03:16,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 17:03:16,110 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 17:03:16,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:03:15" (1/2) ... [2018-12-03 17:03:16,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dfb420a and model type Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:03:16, skipping insertion in model container [2018-12-03 17:03:16,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:03:16" (2/2) ... [2018-12-03 17:03:16,114 INFO L112 eAbstractionObserver]: Analyzing ICFG Power3-Safe.bpl [2018-12-03 17:03:16,124 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 17:03:16,132 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 17:03:16,151 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 17:03:16,187 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 17:03:16,187 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 17:03:16,187 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 17:03:16,188 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 17:03:16,188 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 17:03:16,188 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 17:03:16,188 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 17:03:16,188 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 17:03:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 17:03:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 17:03:16,211 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:03:16,212 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 17:03:16,214 INFO L423 AbstractCegarLoop]: === Iteration 1 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 17:03:16,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:03:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-12-03 17:03:16,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:03:16,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:03:16,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:03:16,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:03:16,283 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:03:16,320 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 17:03:16,320 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 17:03:16,320 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 17:03:16,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:03:16,340 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 17:03:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:03:16,376 INFO L193 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-12-03 17:03:16,378 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:03:16,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:03:16,378 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:03:16,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:03:16,393 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:03:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:03:16,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:03:16,686 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 17:03:16,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:03:18,856 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 17:03:18,876 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:03:18,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2018-12-03 17:03:18,876 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:03:18,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 17:03:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 17:03:18,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2018-12-03 17:03:18,896 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-12-03 17:03:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:03:19,018 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-03 17:03:19,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 17:03:19,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-03 17:03:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:03:19,032 INFO L225 Difference]: With dead ends: 10 [2018-12-03 17:03:19,032 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 17:03:19,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2018-12-03 17:03:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 17:03:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 17:03:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 17:03:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 17:03:19,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 17:03:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:03:19,071 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 17:03:19,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 17:03:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 17:03:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 17:03:19,072 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:03:19,072 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-03 17:03:19,072 INFO L423 AbstractCegarLoop]: === Iteration 2 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 17:03:19,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:03:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-12-03 17:03:19,073 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:03:19,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:03:19,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:03:19,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:03:19,075 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:03:19,078 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 17:03:19,078 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 17:03:19,078 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 17:03:19,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:03:19,095 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 17:03:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:03:19,130 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-03 17:03:19,132 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9] [2018-12-03 17:03:19,174 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 17:03:19,175 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 17:03:19,311 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 17:03:19,312 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 3 different actions 3 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 17:03:19,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:03:19,363 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 17:03:19,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:03:19,364 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:03:19,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:03:19,380 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 17:03:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:03:19,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:03:19,781 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 17:03:19,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:03:19,986 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 17:03:20,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 17:03:20,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-12-03 17:03:20,006 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:03:20,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 17:03:20,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 17:03:20,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-03 17:03:20,008 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-12-03 17:03:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:03:20,396 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2018-12-03 17:03:20,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 17:03:20,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-03 17:03:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:03:20,397 INFO L225 Difference]: With dead ends: 13 [2018-12-03 17:03:20,397 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 17:03:20,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-03 17:03:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 17:03:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 17:03:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 17:03:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-03 17:03:20,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2018-12-03 17:03:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:03:20,404 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-03 17:03:20,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 17:03:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-03 17:03:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 17:03:20,405 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:03:20,405 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-12-03 17:03:20,405 INFO L423 AbstractCegarLoop]: === Iteration 3 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 17:03:20,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:03:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 2 times [2018-12-03 17:03:20,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:03:20,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:03:20,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:03:20,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:03:20,408 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:03:20,411 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 17:03:20,411 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 17:03:20,411 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 17:03:20,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:03:20,421 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 17:03:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:03:20,450 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:03:20,450 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:03:20,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:03:20,450 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:03:20,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 17:03:20,459 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 17:03:20,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 17:03:20,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:03:20,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:03:20,797 WARN L180 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-12-03 17:03:20,998 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 17:03:20,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:03:28,087 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 17:03:28,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 17:03:28,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-12-03 17:03:28,106 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 17:03:28,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 17:03:28,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 17:03:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=164, Unknown=2, NotChecked=0, Total=240 [2018-12-03 17:03:28,107 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-12-03 17:03:37,289 WARN L180 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-12-03 17:03:46,019 WARN L180 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 50 [2018-12-03 17:03:55,056 WARN L180 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 49 [2018-12-03 17:03:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:03:55,062 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-12-03 17:03:55,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 17:03:55,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-12-03 17:03:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:03:55,064 INFO L225 Difference]: With dead ends: 18 [2018-12-03 17:03:55,064 INFO L226 Difference]: Without dead ends: 15 [2018-12-03 17:03:55,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=192, Invalid=350, Unknown=10, NotChecked=0, Total=552 [2018-12-03 17:03:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-03 17:03:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-03 17:03:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-03 17:03:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-03 17:03:55,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2018-12-03 17:03:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:03:55,076 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-03 17:03:55,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 17:03:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-03 17:03:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 17:03:55,077 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:03:55,077 INFO L402 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-12-03 17:03:55,078 INFO L423 AbstractCegarLoop]: === Iteration 4 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 17:03:55,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:03:55,078 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 3 times [2018-12-03 17:03:55,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:03:55,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:03:55,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:03:55,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:03:55,080 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:03:55,083 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 17:03:55,083 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 17:03:55,084 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 17:03:55,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 17:03:55,099 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 17:03:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:03:56,102 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 17:03:56,102 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 17:03:56,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:03:56,102 INFO 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 17:03:56,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 17:03:56,111 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 17:03:56,133 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 17:03:56,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 17:03:56,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 17:04:02,520 WARN L180 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-12-03 17:04:14,930 WARN L180 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-12-03 17:04:26,526 WARN L180 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-12-03 17:04:44,027 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-12-03 17:05:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 17:05:00,494 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 17:05:18,469 WARN L180 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-12-03 17:05:26,033 WARN L180 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-12-03 17:05:35,050 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-03 17:05:35,251 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 17:05:35,253 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:893) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:767) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:339) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 40 more [2018-12-03 17:05:35,258 INFO L168 Benchmark]: Toolchain (without parser) took 139491.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 372.7 MB). Peak memory consumption was 372.7 MB. Max. memory is 7.1 GB. [2018-12-03 17:05:35,259 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 17:05:35,260 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.51 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 17:05:35,260 INFO L168 Benchmark]: Boogie Preprocessor took 28.81 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 17:05:35,261 INFO L168 Benchmark]: RCFGBuilder took 267.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 17:05:35,262 INFO L168 Benchmark]: TraceAbstraction took 139149.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 351.6 MB). Peak memory consumption was 351.6 MB. Max. memory is 7.1 GB. [2018-12-03 17:05:35,266 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 41.51 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 28.81 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 267.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 139149.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 351.6 MB). Peak memory consumption was 351.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...