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/toy/nonlinear/Power3-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 16:01:25,210 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 16:01:25,212 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 16:01:25,224 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 16:01:25,224 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 16:01:25,225 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 16:01:25,227 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 16:01:25,229 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 16:01:25,231 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 16:01:25,232 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 16:01:25,232 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 16:01:25,233 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 16:01:25,234 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 16:01:25,235 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 16:01:25,236 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 16:01:25,237 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 16:01:25,238 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 16:01:25,240 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 16:01:25,242 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 16:01:25,243 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 16:01:25,245 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 16:01:25,246 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 16:01:25,249 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-12-03 16:01:25,258 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2018-12-03 16:01:25,271 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 16:01:25,272 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 16:01:25,273 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 16:01:25,273 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 16:01:25,273 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 16:01:25,273 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 16:01:25,274 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 16:01:25,274 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 16:01:25,274 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 16:01:25,274 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 16:01:25,277 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 16:01:25,277 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 16:01:25,277 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 16:01:25,277 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 16:01:25,277 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 16:01:25,278 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 16:01:25,278 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 16:01:25,278 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 16:01:25,279 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 16:01:25,279 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 16:01:25,279 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 16:01:25,279 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 16:01:25,281 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 16:01:25,281 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 16:01:25,281 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 16:01:25,282 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 16:01:25,282 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 16:01:25,282 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 16:01:25,282 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 16:01:25,283 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 16:01:25,284 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 16:01:25,284 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 16:01:25,284 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:01:25,285 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 16:01:25,285 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 16:01:25,285 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 16:01:25,285 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 16:01:25,286 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 16:01:25,287 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 16:01:25,287 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 16:01:25,287 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 16:01:25,341 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 16:01:25,352 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 16:01:25,356 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 16:01:25,358 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 16:01:25,358 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 16:01:25,359 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Power3-Safe.bpl [2018-12-03 16:01:25,359 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Power3-Safe.bpl' [2018-12-03 16:01:25,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 16:01:25,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 16:01:25,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 16:01:25,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 16:01:25,391 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 16:01:25,408 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,418 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,424 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 16:01:25,424 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 16:01:25,425 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 16:01:25,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 16:01:25,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 16:01:25,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 16:01:25,428 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 16:01:25,440 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,441 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,441 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,442 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,444 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,449 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,450 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 04:01:25" (1/1) ... [2018-12-03 16:01:25,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 16:01:25,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 16:01:25,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 16:01:25,452 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 16:01:25,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:01:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:01:25,524 INFO L124 BoogieDeclarations]: Specification and implementation of procedure power given in one single declaration [2018-12-03 16:01:25,525 INFO L130 BoogieDeclarations]: Found specification of procedure power [2018-12-03 16:01:25,525 INFO L138 BoogieDeclarations]: Found implementation of procedure power [2018-12-03 16:01:25,596 WARN L615 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-12-03 16:01:25,740 INFO L272 CfgBuilder]: Using library mode [2018-12-03 16:01:25,740 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 16:01:25,741 INFO L202 PluginConnector]: Adding new model Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:01:25 BoogieIcfgContainer [2018-12-03 16:01:25,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 16:01:25,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 16:01:25,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 16:01:25,745 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 16:01:25,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:01:25" (1/2) ... [2018-12-03 16:01:25,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36808b2f and model type Power3-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 04:01:25, skipping insertion in model container [2018-12-03 16:01:25,747 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 04:01:25" (2/2) ... [2018-12-03 16:01:25,749 INFO L112 eAbstractionObserver]: Analyzing ICFG Power3-Safe.bpl [2018-12-03 16:01:25,761 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 16:01:25,768 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 16:01:25,786 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 16:01:25,823 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 16:01:25,824 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 16:01:25,824 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 16:01:25,824 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 16:01:25,824 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 16:01:25,824 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 16:01:25,824 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 16:01:25,825 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 16:01:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 16:01:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 16:01:25,844 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:01:25,845 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 16:01:25,847 INFO L423 AbstractCegarLoop]: === Iteration 1 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 16:01:25,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:01:25,854 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-12-03 16:01:25,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:01:25,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:01:25,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:01:25,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:01:25,909 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:01:25,940 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 16:01:25,941 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 16:01:25,941 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 16:01:25,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:01:25,954 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 16:01:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:01:25,992 INFO L193 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-12-03 16:01:25,994 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:01:25,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:01:25,994 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:01:26,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:01:26,010 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:01:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:01:26,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:01:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:01:26,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:01:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:01:28,493 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:01:28,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2018-12-03 16:01:28,493 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:01:28,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 16:01:28,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 16:01:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2018-12-03 16:01:28,514 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-12-03 16:01:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:01:28,620 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-03 16:01:28,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 16:01:28,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-03 16:01:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:01:28,634 INFO L225 Difference]: With dead ends: 10 [2018-12-03 16:01:28,634 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 16:01:28,638 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 16:01:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 16:01:28,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 16:01:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 16:01:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 16:01:28,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 16:01:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:01:28,675 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 16:01:28,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 16:01:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 16:01:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 16:01:28,676 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:01:28,677 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-03 16:01:28,677 INFO L423 AbstractCegarLoop]: === Iteration 2 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 16:01:28,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:01:28,678 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-12-03 16:01:28,678 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:01:28,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:01:28,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:01:28,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:01:28,680 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:01:28,683 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 16:01:28,683 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 16:01:28,683 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 16:01:28,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:01:28,702 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 16:01:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:01:28,745 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-03 16:01:28,747 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9] [2018-12-03 16:01:28,797 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 16:01:28,798 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 16:01:28,918 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 16:01:28,920 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 16:01:28,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:01:28,929 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 16:01:28,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:01:28,929 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:01:28,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:01:28,950 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 16:01:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:01:28,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:01:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:01:29,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:01:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:01:29,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 16:01:29,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-12-03 16:01:29,558 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:01:29,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 16:01:29,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 16:01:29,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-03 16:01:29,560 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-12-03 16:01:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:01:29,902 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2018-12-03 16:01:29,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 16:01:29,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-03 16:01:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:01:29,904 INFO L225 Difference]: With dead ends: 13 [2018-12-03 16:01:29,905 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 16:01:29,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-03 16:01:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 16:01:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 16:01:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 16:01:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-03 16:01:29,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2018-12-03 16:01:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:01:29,912 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-03 16:01:29,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 16:01:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-03 16:01:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 16:01:29,912 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:01:29,913 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-12-03 16:01:29,913 INFO L423 AbstractCegarLoop]: === Iteration 3 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 16:01:29,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:01:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 2 times [2018-12-03 16:01:29,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:01:29,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:01:29,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:01:29,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:01:29,915 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:01:29,918 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 16:01:29,919 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 16:01:29,919 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 16:01:29,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:01:29,939 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 16:01:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:01:29,973 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:01:29,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:01:29,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:01:29,974 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:01:29,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 16:01:29,982 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 16:01:30,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 16:01:30,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:01:30,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:01:30,342 WARN L180 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-12-03 16:01:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:01:30,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:01:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:01:41,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 16:01:41,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-12-03 16:01:41,184 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 16:01:41,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 16:01:41,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 16:01:41,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=164, Unknown=4, NotChecked=0, Total=240 [2018-12-03 16:01:41,186 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-12-03 16:01:48,824 WARN L180 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2018-12-03 16:01:56,693 WARN L180 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 52 [2018-12-03 16:02:02,194 WARN L180 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-12-03 16:02:11,168 WARN L180 SmtUtils]: Spent 4.92 s on a formula simplification that was a NOOP. DAG size: 50 [2018-12-03 16:02:20,184 WARN L180 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 49 [2018-12-03 16:02:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:02:20,198 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-12-03 16:02:20,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 16:02:20,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-12-03 16:02:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:02:20,200 INFO L225 Difference]: With dead ends: 18 [2018-12-03 16:02:20,200 INFO L226 Difference]: Without dead ends: 15 [2018-12-03 16:02:20,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=203, Invalid=385, Unknown=12, NotChecked=0, Total=600 [2018-12-03 16:02:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-03 16:02:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-03 16:02:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-03 16:02:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-03 16:02:20,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2018-12-03 16:02:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:02:20,210 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-03 16:02:20,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 16:02:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-03 16:02:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 16:02:20,211 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:02:20,212 INFO L402 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-12-03 16:02:20,212 INFO L423 AbstractCegarLoop]: === Iteration 4 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 16:02:20,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:02:20,212 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 3 times [2018-12-03 16:02:20,213 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:02:20,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:02:20,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:02:20,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:02:20,214 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:02:20,217 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 16:02:20,217 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 16:02:20,218 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 16:02:20,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 16:02:20,227 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 16:02:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:02:20,815 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 16:02:20,815 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 16:02:20,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:02:20,816 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:02:20,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 16:02:20,826 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 16:02:20,846 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 16:02:20,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 16:02:20,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 16:02:36,985 WARN L180 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-12-03 16:02:52,541 WARN L180 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 31 [2018-12-03 16:03:04,767 WARN L180 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-12-03 16:03:45,461 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 16:03:45,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 16:04:15,463 WARN L180 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 35 [2018-12-03 16:04:29,133 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-03 16:04:29,334 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 16:04:29,335 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 16:04:29,340 INFO L168 Benchmark]: Toolchain (without parser) took 183951.67 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: 383.3 MB). Peak memory consumption was 383.3 MB. Max. memory is 7.1 GB. [2018-12-03 16:04:29,341 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:04:29,342 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:04:29,342 INFO L168 Benchmark]: Boogie Preprocessor took 23.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:04:29,343 INFO L168 Benchmark]: RCFGBuilder took 289.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 16:04:29,344 INFO L168 Benchmark]: TraceAbstraction took 183597.12 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 362.2 MB). Peak memory consumption was 362.2 MB. Max. memory is 7.1 GB. [2018-12-03 16:04:29,348 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 37.21 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 23.17 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 289.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 183597.12 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 362.2 MB). Peak memory consumption was 362.2 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...