java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/half.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:35:18,157 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:35:18,162 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:35:18,181 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 15:35:18,181 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 15:35:18,182 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 15:35:18,185 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 15:35:18,187 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 15:35:18,189 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 15:35:18,190 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 15:35:18,199 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 15:35:18,241 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 15:35:18,263 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:35:18,263 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:35:18,264 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:35:18,264 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:35:18,264 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:35:18,264 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:35:18,265 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:35:18,265 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:35:18,265 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:35:18,265 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:35:18,265 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:35:18,268 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:35:18,268 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:35:18,268 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:35:18,269 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:35:18,269 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:35:18,270 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:35:18,270 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:35:18,270 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:35:18,270 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:35:18,270 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:35:18,271 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:35:18,272 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:35:18,272 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:35:18,273 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:35:18,273 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:35:18,273 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:35:18,273 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:35:18,273 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:35:18,274 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:35:18,274 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:35:18,274 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:35:18,274 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:35:18,274 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:35:18,275 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:35:18,275 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:35:18,275 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:35:18,275 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:35:18,275 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:35:18,276 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:35:18,276 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:35:18,333 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:35:18,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:35:18,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:35:18,355 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:35:18,356 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:35:18,356 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/half.i_3.bpl [2018-12-03 15:35:18,357 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/half.i_3.bpl' [2018-12-03 15:35:18,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:35:18,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:35:18,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:35:18,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:35:18,415 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:35:18,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:35:18,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:35:18,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:35:18,456 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:35:18,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/1) ... [2018-12-03 15:35:18,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:35:18,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:35:18,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:35:18,482 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:35:18,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (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 15:35:18,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 15:35:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 15:35:18,736 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 15:35:18,736 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 15:35:18,738 INFO L202 PluginConnector]: Adding new model half.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:35:18 BoogieIcfgContainer [2018-12-03 15:35:18,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:35:18,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:35:18,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:35:18,744 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:35:18,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:35:18" (1/2) ... [2018-12-03 15:35:18,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb8db6a and model type half.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:35:18, skipping insertion in model container [2018-12-03 15:35:18,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:35:18" (2/2) ... [2018-12-03 15:35:18,749 INFO L112 eAbstractionObserver]: Analyzing ICFG half.i_3.bpl [2018-12-03 15:35:18,759 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:35:18,768 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:35:18,783 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:35:18,815 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:35:18,815 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:35:18,816 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:35:18,816 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:35:18,816 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:35:18,816 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:35:18,816 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:35:18,817 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:35:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 15:35:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 15:35:18,839 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:35:18,839 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 15:35:18,844 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:35:18,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:35:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-12-03 15:35:18,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:35:18,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:35:18,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:35:18,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:35:18,907 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:35:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:35:19,242 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-12-03 15:35:19,245 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 15:35:19,247 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:35:19,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:35:19,247 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:35:19,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:35:19,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:35:19,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:35:19,268 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-03 15:35:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:35:19,303 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-03 15:35:19,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:35:19,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 15:35:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:35:19,316 INFO L225 Difference]: With dead ends: 9 [2018-12-03 15:35:19,316 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 15:35:19,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:35:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 15:35:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 15:35:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 15:35:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 15:35:19,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 15:35:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:35:19,354 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 15:35:19,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:35:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 15:35:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 15:35:19,355 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:35:19,356 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 15:35:19,356 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:35:19,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:35:19,356 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-12-03 15:35:19,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:35:19,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:35:19,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:35:19,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:35:19,358 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:35:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:35:19,732 WARN L180 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-12-03 15:35:19,733 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 15:35:19,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:35:19,734 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:35:19,734 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 15:35:19,737 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-03 15:35:19,778 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:35:19,778 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:35:20,022 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 15:35:20,025 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 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 15:35:20,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:35:20,048 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 15:35:20,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:35:20,049 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 15:35:20,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:35:20,063 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:35:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:35:20,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:35:20,177 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 15:35:20,178 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:35:20,340 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 15:35:20,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:35:20,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-03 15:35:20,369 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:35:20,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 15:35:20,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 15:35:20,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-12-03 15:35:20,372 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 6 states. [2018-12-03 15:35:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:35:20,533 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2018-12-03 15:35:20,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 15:35:20,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-03 15:35:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:35:20,534 INFO L225 Difference]: With dead ends: 6 [2018-12-03 15:35:20,534 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 15:35:20,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-12-03 15:35:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 15:35:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 15:35:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 15:35:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 15:35:20,537 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2018-12-03 15:35:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:35:20,538 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 15:35:20,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 15:35:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 15:35:20,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 15:35:20,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 15:35:20,723 WARN L180 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2018-12-03 15:35:20,729 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 48) no Hoare annotation was computed. [2018-12-03 15:35:20,729 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 47) no Hoare annotation was computed. [2018-12-03 15:35:20,729 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 48) no Hoare annotation was computed. [2018-12-03 15:35:20,730 INFO L444 ceAbstractionStarter]: At program point L45(lines 22 45) the Hoare annotation is: (or (and (< 0 (* 2 ULTIMATE.start_main_~k~5)) (<= ULTIMATE.start_main_~i~5 1)) (and (= ULTIMATE.start_main_~i~5 0) (= ULTIMATE.start_main_~n~5 0))) [2018-12-03 15:35:20,730 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 48) no Hoare annotation was computed. [2018-12-03 15:35:20,730 INFO L444 ceAbstractionStarter]: At program point L35(lines 35 46) the Hoare annotation is: false [2018-12-03 15:35:20,740 INFO L202 PluginConnector]: Adding new model half.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:35:20 BoogieIcfgContainer [2018-12-03 15:35:20,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 15:35:20,741 INFO L168 Benchmark]: Toolchain (without parser) took 2328.84 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: 87.2 MB). Peak memory consumption was 87.2 MB. Max. memory is 7.1 GB. [2018-12-03 15:35:20,742 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 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 15:35:20,745 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.71 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 15:35:20,745 INFO L168 Benchmark]: Boogie Preprocessor took 25.96 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 15:35:20,746 INFO L168 Benchmark]: RCFGBuilder took 256.46 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 15:35:20,747 INFO L168 Benchmark]: TraceAbstraction took 2000.61 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: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2018-12-03 15:35:20,755 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 0.24 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 40.71 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 25.96 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 256.46 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 2000.61 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: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: 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: 22]: Loop Invariant Derived loop invariant: (0 < 2 * main_~k~5 && main_~i~5 <= 1) || (main_~i~5 == 0 && main_~n~5 == 0) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: false - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 1.9s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 4 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 10 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s 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, 0.3s 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, 18 HoareAnnotationTreeSize, 2 FomulaSimplifications, 19 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 1 QuantifiedInterpolants, 220 SizeOfPredicates, 4 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 9 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...