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_oct.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum01_bug02.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 19:22:18,160 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 19:22:18,162 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 19:22:18,175 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-03 19:22:18,208 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2018-12-03 19:22:18,222 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 19:22:18,223 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 19:22:18,224 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 19:22:18,224 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 19:22:18,224 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 19:22:18,225 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 19:22:18,225 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 19:22:18,225 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 19:22:18,225 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 19:22:18,225 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-03 19:22:18,225 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 19:22:18,226 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 19:22:18,226 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 19:22:18,226 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 19:22:18,227 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 19:22:18,227 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 19:22:18,227 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 19:22:18,227 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 19:22:18,228 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 19:22:18,228 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 19:22:18,228 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 19:22:18,228 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 19:22:18,228 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 19:22:18,229 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 19:22:18,229 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 19:22:18,229 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 19:22:18,229 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 19:22:18,229 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 19:22:18,230 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 19:22:18,230 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 19:22:18,230 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 19:22:18,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 19:22:18,230 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 19:22:18,231 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 19:22:18,231 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 19:22:18,231 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 19:22:18,231 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 19:22:18,231 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 19:22:18,232 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 19:22:18,232 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 19:22:18,264 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 19:22:18,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 19:22:18,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 19:22:18,284 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 19:22:18,284 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 19:22:18,285 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum01_bug02.i_3.bpl [2018-12-03 19:22:18,286 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum01_bug02.i_3.bpl' [2018-12-03 19:22:18,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 19:22:18,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 19:22:18,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 19:22:18,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 19:22:18,332 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 19:22:18,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 19:22:18,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 19:22:18,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 19:22:18,375 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 19:22:18,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/1) ... [2018-12-03 19:22:18,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 19:22:18,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 19:22:18,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 19:22:18,400 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 19:22:18,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (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 19:22:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 19:22:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 19:22:18,751 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 19:22:18,751 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 19:22:18,752 INFO L202 PluginConnector]: Adding new model sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:22:18 BoogieIcfgContainer [2018-12-03 19:22:18,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 19:22:18,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 19:22:18,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 19:22:18,757 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 19:22:18,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:18" (1/2) ... [2018-12-03 19:22:18,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fcd9e and model type sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:22:18, skipping insertion in model container [2018-12-03 19:22:18,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:22:18" (2/2) ... [2018-12-03 19:22:18,761 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i_3.bpl [2018-12-03 19:22:18,772 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 19:22:18,781 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 19:22:18,802 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 19:22:18,845 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 19:22:18,845 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 19:22:18,846 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 19:22:18,846 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 19:22:18,846 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 19:22:18,846 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 19:22:18,848 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 19:22:18,848 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 19:22:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 19:22:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 19:22:18,883 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:22:18,884 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 19:22:18,887 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:22:18,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:22:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-12-03 19:22:18,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:22:18,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:22:18,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:22:18,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:22:18,947 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:22:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:22:19,082 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 19:22:19,084 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:22:19,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 19:22:19,084 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:22:19,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 19:22:19,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 19:22:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:22:19,104 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-03 19:22:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:22:19,160 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-03 19:22:19,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 19:22:19,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 19:22:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:22:19,175 INFO L225 Difference]: With dead ends: 9 [2018-12-03 19:22:19,175 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 19:22:19,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:22:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 19:22:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 19:22:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 19:22:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 19:22:19,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 19:22:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:22:19,218 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 19:22:19,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 19:22:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 19:22:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 19:22:19,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:22:19,219 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 19:22:19,219 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:22:19,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:22:19,220 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-12-03 19:22:19,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:22:19,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:22:19,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:22:19,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:22:19,222 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:22:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:22:19,578 WARN L180 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-12-03 19:22:19,580 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 19:22:19,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:22:19,581 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:22:19,582 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 19:22:19,584 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-03 19:22:19,646 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 19:22:19,647 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 19:22:19,724 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-12-03 19:22:20,358 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 19:22:20,360 INFO L272 AbstractInterpreter]: Visited 4 different actions 57 times. Merged at 3 different actions 52 times. Widened at 2 different actions 29 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 19:22:20,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:22:20,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 19:22:20,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:22:20,391 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:22:20,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:22:20,404 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:22:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:22:20,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:22:20,563 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 19:22:20,564 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:22:20,686 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 19:22:20,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:22:20,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-03 19:22:20,720 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:22:20,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 19:22:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 19:22:20,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-03 19:22:20,725 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 6 states. [2018-12-03 19:22:21,100 WARN L180 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-12-03 19:22:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:22:21,237 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2018-12-03 19:22:21,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 19:22:21,238 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-03 19:22:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:22:21,239 INFO L225 Difference]: With dead ends: 6 [2018-12-03 19:22:21,239 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 19:22:21,241 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-12-03 19:22:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 19:22:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 19:22:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 19:22:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 19:22:21,242 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2018-12-03 19:22:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:22:21,242 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 19:22:21,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 19:22:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 19:22:21,243 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 19:22:21,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 19:22:21,342 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 49) no Hoare annotation was computed. [2018-12-03 19:22:21,343 INFO L444 ceAbstractionStarter]: At program point L46(lines 22 46) the Hoare annotation is: (or (let ((.cse1 (+ ULTIMATE.start_main_~sn~5 2)) (.cse0 (* 2 ULTIMATE.start_main_~i~5))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= ULTIMATE.start_main_~sn~5 (* 2 ULTIMATE.start_main_~n~5)))) (and (= ULTIMATE.start_main_~i~5 1) (= ULTIMATE.start_main_~sn~5 0))) [2018-12-03 19:22:21,343 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 49) no Hoare annotation was computed. [2018-12-03 19:22:21,343 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 49) no Hoare annotation was computed. [2018-12-03 19:22:21,343 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 48) no Hoare annotation was computed. [2018-12-03 19:22:21,343 INFO L444 ceAbstractionStarter]: At program point L35(lines 35 47) the Hoare annotation is: false [2018-12-03 19:22:21,353 INFO L202 PluginConnector]: Adding new model sum01_bug02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 07:22:21 BoogieIcfgContainer [2018-12-03 19:22:21,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 19:22:21,354 INFO L168 Benchmark]: Toolchain (without parser) took 3024.40 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 705.7 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -699.2 MB). Peak memory consumption was 6.5 MB. Max. memory is 7.1 GB. [2018-12-03 19:22:21,356 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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 19:22:21,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.03 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 19:22:21,357 INFO L168 Benchmark]: Boogie Preprocessor took 24.85 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 19:22:21,358 INFO L168 Benchmark]: RCFGBuilder took 352.38 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 19:22:21,359 INFO L168 Benchmark]: TraceAbstraction took 2599.95 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 705.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -720.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:22:21,364 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 0.20 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 42.03 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 24.85 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 352.38 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 2599.95 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 705.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -720.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((2 * main_~i~5 <= main_~sn~5 + 2 && main_~sn~5 + 2 <= 2 * main_~i~5) && main_~sn~5 <= 2 * main_~n~5) || (main_~i~5 == 1 && main_~sn~5 == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 2.5s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 9 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.8s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 29 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 1 QuantifiedInterpolants, 275 SizeOfPredicates, 6 NumberOfNonLiveVariables, 26 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...