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/string_concat-noarr.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 19:22:06,670 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 19:22:06,672 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 19:22:06,692 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-03 19:22:06,748 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 19:22:06,773 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 19:22:06,774 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 19:22:06,775 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 19:22:06,776 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 19:22:06,776 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 19:22:06,776 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 19:22:06,776 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 19:22:06,777 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 19:22:06,778 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 19:22:06,778 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-03 19:22:06,778 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 19:22:06,778 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 19:22:06,778 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 19:22:06,779 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 19:22:06,779 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 19:22:06,780 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 19:22:06,780 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 19:22:06,780 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 19:22:06,780 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 19:22:06,783 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 19:22:06,783 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 19:22:06,783 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 19:22:06,783 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 19:22:06,784 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 19:22:06,784 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 19:22:06,784 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 19:22:06,784 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 19:22:06,784 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 19:22:06,785 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 19:22:06,785 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 19:22:06,785 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 19:22:06,785 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 19:22:06,785 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 19:22:06,787 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 19:22:06,787 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 19:22:06,787 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 19:22:06,787 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 19:22:06,787 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 19:22:06,788 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 19:22:06,788 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 19:22:06,846 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 19:22:06,864 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 19:22:06,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 19:22:06,873 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 19:22:06,874 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 19:22:06,877 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/string_concat-noarr.i_3.bpl [2018-12-03 19:22:06,878 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/string_concat-noarr.i_3.bpl' [2018-12-03 19:22:06,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 19:22:06,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 19:22:06,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 19:22:06,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 19:22:06,918 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 19:22:06,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 19:22:06,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 19:22:06,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 19:22:06,962 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 19:22:06,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/1) ... [2018-12-03 19:22:06,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 19:22:06,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 19:22:06,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 19:22:06,995 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 19:22:06,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (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 19:22:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 19:22:07,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 19:22:07,400 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 19:22:07,400 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-03 19:22:07,402 INFO L202 PluginConnector]: Adding new model string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:22:07 BoogieIcfgContainer [2018-12-03 19:22:07,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 19:22:07,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 19:22:07,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 19:22:07,408 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 19:22:07,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:22:06" (1/2) ... [2018-12-03 19:22:07,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d493f61 and model type string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:22:07, skipping insertion in model container [2018-12-03 19:22:07,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:22:07" (2/2) ... [2018-12-03 19:22:07,413 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i_3.bpl [2018-12-03 19:22:07,424 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 19:22:07,435 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 19:22:07,456 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 19:22:07,507 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 19:22:07,508 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 19:22:07,508 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 19:22:07,508 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 19:22:07,508 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 19:22:07,508 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 19:22:07,509 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 19:22:07,509 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 19:22:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-12-03 19:22:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 19:22:07,536 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:22:07,537 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 19:22:07,542 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:22:07,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:22:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-12-03 19:22:07,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:22:07,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:22:07,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:22:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:22:07,612 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:22:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:22:07,734 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 19:22:07,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:22:07,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 19:22:07,738 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:22:07,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 19:22:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 19:22:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:22:07,759 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-12-03 19:22:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:22:07,804 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-12-03 19:22:07,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 19:22:07,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-12-03 19:22:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:22:07,818 INFO L225 Difference]: With dead ends: 11 [2018-12-03 19:22:07,819 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 19:22:07,823 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 19:22:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 19:22:07,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 19:22:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 19:22:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 19:22:07,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-12-03 19:22:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:22:07,861 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 19:22:07,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 19:22:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 19:22:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 19:22:07,862 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:22:07,862 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-03 19:22:07,863 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:22:07,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:22:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-12-03 19:22:07,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:22:07,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:22:07,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:22:07,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:22:07,866 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:22:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:22:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:22:08,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:22:08,069 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:22:08,070 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-03 19:22:08,073 INFO L205 CegarAbsIntRunner]: [0], [2], [6], [8], [10] [2018-12-03 19:22:08,238 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 19:22:08,239 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 19:22:08,696 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 19:22:08,700 INFO L272 AbstractInterpreter]: Visited 4 different actions 31 times. Merged at 2 different actions 18 times. Widened at 2 different actions 10 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 19:22:08,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:22:08,737 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 19:22:08,790 INFO L219 lantSequenceWeakener]: Could never weaken! [2018-12-03 19:22:08,790 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 19:22:08,892 INFO L418 sIntCurrentIteration]: We unified 5 AI predicates to 5 [2018-12-03 19:22:08,892 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 19:22:08,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 19:22:08,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-12-03 19:22:08,894 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:22:08,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 19:22:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 19:22:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 19:22:08,897 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-12-03 19:22:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:22:08,965 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-12-03 19:22:08,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 19:22:08,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-12-03 19:22:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:22:08,967 INFO L225 Difference]: With dead ends: 7 [2018-12-03 19:22:08,967 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 19:22:08,968 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 19:22:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 19:22:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 19:22:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 19:22:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 19:22:08,970 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-12-03 19:22:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:22:08,970 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 19:22:08,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 19:22:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 19:22:08,971 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 19:22:08,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 19:22:09,289 WARN L180 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2018-12-03 19:22:09,354 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 54) no Hoare annotation was computed. [2018-12-03 19:22:09,354 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 54) no Hoare annotation was computed. [2018-12-03 19:22:09,355 INFO L444 ceAbstractionStarter]: At program point L29(lines 29 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_#t~nondet2|))) (and (<= (+ ULTIMATE.start_main_~j~5 ULTIMATE.start_main_~i~5) 2000000) (<= ULTIMATE.start_main_~i~5 ULTIMATE.start_main_~j~5) (<= 0 (+ .cse0 4294967296)) (<= 0 (* 2 ULTIMATE.start_main_~i~5)) (<= .cse0 4294967294) (<= ULTIMATE.start_main_~j~5 ULTIMATE.start_main_~i~5))) [2018-12-03 19:22:09,355 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 54) no Hoare annotation was computed. [2018-12-03 19:22:09,356 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 53) no Hoare annotation was computed. [2018-12-03 19:22:09,358 INFO L444 ceAbstractionStarter]: At program point L51(lines 51 52) the Hoare annotation is: false [2018-12-03 19:22:09,359 INFO L444 ceAbstractionStarter]: At program point L41(lines 25 41) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~i~5))) (and (<= ULTIMATE.start_main_~i~5 ULTIMATE.start_main_~j~5) (<= .cse0 2000000) (<= 0 .cse0) (<= ULTIMATE.start_main_~j~5 ULTIMATE.start_main_~i~5))) [2018-12-03 19:22:09,372 INFO L202 PluginConnector]: Adding new model string_concat-noarr.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 07:22:09 BoogieIcfgContainer [2018-12-03 19:22:09,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 19:22:09,373 INFO L168 Benchmark]: Toolchain (without parser) took 2457.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-12-03 19:22:09,375 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.37 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:22:09,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:22:09,377 INFO L168 Benchmark]: Boogie Preprocessor took 31.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:22:09,377 INFO L168 Benchmark]: RCFGBuilder took 408.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 19:22:09,379 INFO L168 Benchmark]: TraceAbstraction took 1968.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-12-03 19:22:09,384 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 0.37 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 408.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 1968.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 53]: 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: 29]: Loop Invariant Derived loop invariant: ((((main_~j~5 + main_~i~5 <= 2000000 && main_~i~5 <= main_~j~5) && 0 <= 2 * main_#t~nondet2 + 4294967296) && 0 <= 2 * main_~i~5) && 2 * main_#t~nondet2 <= 4294967294) && main_~j~5 <= main_~i~5 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((main_~i~5 <= main_~j~5 && 2 * main_~i~5 <= 2000000) && 0 <= 2 * main_~i~5) && main_~j~5 <= main_~i~5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 1.8s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 6 SDtfs, 1 SDslu, 2 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9199999999999999 AbsIntWeakeningRatio, 0.8 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 47 HoareAnnotationTreeSize, 3 FomulaSimplifications, 136 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 82 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 86 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...