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/count_by_1_variant.i_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:24:14,517 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:24:14,519 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:24:14,539 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 15:24:14,540 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 15:24:14,541 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 15:24:14,542 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 15:24:14,544 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 15:24:14,546 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 15:24:14,547 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 15:24:14,548 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 15:24:14,573 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 15:24:14,587 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:24:14,588 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:24:14,588 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:24:14,589 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:24:14,589 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:24:14,589 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:24:14,589 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:24:14,589 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:24:14,590 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:24:14,590 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:24:14,590 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:24:14,590 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:24:14,590 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:24:14,591 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:24:14,591 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:24:14,591 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:24:14,592 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:24:14,592 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:24:14,592 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:24:14,592 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:24:14,592 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:24:14,593 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:24:14,593 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:24:14,593 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:24:14,593 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:24:14,593 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:24:14,594 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:24:14,594 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:24:14,594 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:24:14,594 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:24:14,594 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:24:14,595 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:24:14,595 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:24:14,595 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:24:14,595 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:24:14,595 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:24:14,596 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:24:14,596 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:24:14,596 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:24:14,596 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:24:14,596 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:24:14,654 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:24:14,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:24:14,680 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:24:14,682 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:24:14,682 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:24:14,683 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_1_variant.i_2.bpl [2018-12-03 15:24:14,683 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_1_variant.i_2.bpl' [2018-12-03 15:24:14,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:24:14,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:24:14,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:24:14,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:24:14,723 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:24:14,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:24:14,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:24:14,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:24:14,763 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:24:14,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/1) ... [2018-12-03 15:24:14,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:24:14,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:24:14,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:24:14,788 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:24:14,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (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 15:24:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 15:24:14,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 15:24:15,021 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 15:24:15,021 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 15:24:15,022 INFO L202 PluginConnector]: Adding new model count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:24:15 BoogieIcfgContainer [2018-12-03 15:24:15,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:24:15,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:24:15,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:24:15,025 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:24:15,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:24:14" (1/2) ... [2018-12-03 15:24:15,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761a8a8d and model type count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:24:15, skipping insertion in model container [2018-12-03 15:24:15,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:24:15" (2/2) ... [2018-12-03 15:24:15,029 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i_2.bpl [2018-12-03 15:24:15,039 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:24:15,046 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:24:15,064 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:24:15,094 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:24:15,094 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:24:15,095 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:24:15,095 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:24:15,095 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:24:15,095 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:24:15,095 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:24:15,096 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:24:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-12-03 15:24:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 15:24:15,118 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:24:15,119 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 15:24:15,122 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:24:15,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:24:15,128 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-12-03 15:24:15,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:24:15,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:24:15,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:24:15,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:24:15,178 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:24:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:24:15,288 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 15:24:15,290 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:24:15,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 15:24:15,291 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:24:15,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 15:24:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 15:24:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 15:24:15,311 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-12-03 15:24:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:24:15,521 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-12-03 15:24:15,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 15:24:15,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-03 15:24:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:24:15,550 INFO L225 Difference]: With dead ends: 12 [2018-12-03 15:24:15,551 INFO L226 Difference]: Without dead ends: 8 [2018-12-03 15:24:15,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-03 15:24:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-03 15:24:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-12-03 15:24:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 15:24:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 15:24:15,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-12-03 15:24:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:24:15,594 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 15:24:15,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 15:24:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 15:24:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 15:24:15,595 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:24:15,595 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-03 15:24:15,595 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:24:15,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:24:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-12-03 15:24:15,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:24:15,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:24:15,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:24:15,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:24:15,600 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:24:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:24:15,941 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 15:24:15,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:24:15,942 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:24:15,943 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-03 15:24:15,944 INFO L205 CegarAbsIntRunner]: [0], [2], [6], [8], [10] [2018-12-03 15:24:15,980 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:24:15,980 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:24:16,175 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 15:24:16,178 INFO L272 AbstractInterpreter]: Visited 5 different actions 17 times. Merged at 4 different actions 12 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 15:24:16,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:24:16,193 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 15:24:16,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:24:16,193 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 15:24:16,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:24:16,205 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:24:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:24:16,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:24:16,269 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 15:24:16,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:24:16,347 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 15:24:16,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:24:16,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2018-12-03 15:24:16,368 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:24:16,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 15:24:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 15:24:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-12-03 15:24:16,369 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-12-03 15:24:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:24:16,520 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-12-03 15:24:16,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 15:24:16,520 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-12-03 15:24:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:24:16,521 INFO L225 Difference]: With dead ends: 12 [2018-12-03 15:24:16,521 INFO L226 Difference]: Without dead ends: 10 [2018-12-03 15:24:16,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:24:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-12-03 15:24:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-12-03 15:24:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 15:24:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-03 15:24:16,527 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-12-03 15:24:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:24:16,527 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-03 15:24:16,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 15:24:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-03 15:24:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 15:24:16,528 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:24:16,528 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-12-03 15:24:16,529 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:24:16,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:24:16,529 INFO L82 PathProgramCache]: Analyzing trace with hash 141355773, now seen corresponding path program 2 times [2018-12-03 15:24:16,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:24:16,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:24:16,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:24:16,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:24:16,531 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:24:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:24:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:24:16,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:24:16,809 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:24:16,810 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:24:16,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:24:16,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:24:16,810 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:24:16,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:24:16,831 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:24:16,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 15:24:16,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:24:16,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:24:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:24:16,940 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:24:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:24:17,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:24:17,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-12-03 15:24:17,055 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:24:17,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 15:24:17,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 15:24:17,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-03 15:24:17,057 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-12-03 15:24:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:24:17,332 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-12-03 15:24:17,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 15:24:17,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-12-03 15:24:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:24:17,333 INFO L225 Difference]: With dead ends: 12 [2018-12-03 15:24:17,333 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 15:24:17,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2018-12-03 15:24:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 15:24:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 15:24:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 15:24:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 15:24:17,335 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2018-12-03 15:24:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:24:17,335 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 15:24:17,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 15:24:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 15:24:17,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 15:24:17,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 15:24:17,480 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 35) no Hoare annotation was computed. [2018-12-03 15:24:17,480 INFO L444 ceAbstractionStarter]: At program point L32(lines 32 33) the Hoare annotation is: false [2018-12-03 15:24:17,481 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 35) no Hoare annotation was computed. [2018-12-03 15:24:17,481 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 35) no Hoare annotation was computed. [2018-12-03 15:24:17,481 INFO L444 ceAbstractionStarter]: At program point L28(lines 13 28) the Hoare annotation is: (or (<= ULTIMATE.start_main_~i~4 0) (and (<= ULTIMATE.start_main_~i~4 1000000) (= ULTIMATE.start___VERIFIER_assert_~cond 1))) [2018-12-03 15:24:17,481 INFO L444 ceAbstractionStarter]: At program point L20(lines 20 29) the Hoare annotation is: (and (= ULTIMATE.start___VERIFIER_assert_~cond 1) (<= ULTIMATE.start_main_~i~4 999999)) [2018-12-03 15:24:17,481 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 34) no Hoare annotation was computed. [2018-12-03 15:24:17,492 INFO L202 PluginConnector]: Adding new model count_by_1_variant.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:24:17 BoogieIcfgContainer [2018-12-03 15:24:17,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 15:24:17,493 INFO L168 Benchmark]: Toolchain (without parser) took 2772.60 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: 118.9 MB). Peak memory consumption was 118.9 MB. Max. memory is 7.1 GB. [2018-12-03 15:24:17,495 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 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 15:24:17,496 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.54 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 15:24:17,497 INFO L168 Benchmark]: Boogie Preprocessor took 24.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:24:17,497 INFO L168 Benchmark]: RCFGBuilder took 234.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 15:24:17,498 INFO L168 Benchmark]: TraceAbstraction took 2469.44 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-12-03 15:24:17,502 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 0.15 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 39.54 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 24.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 234.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2469.44 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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: 32]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: main_~i~4 <= 0 || (main_~i~4 <= 1000000 && __VERIFIER_assert_~cond == 1) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: __VERIFIER_assert_~cond == 1 && main_~i~4 <= 999999 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 2.3s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 8 SDtfs, 4 SDslu, 14 SDs, 0 SdLazy, 29 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 10 NumberOfFragments, 19 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 76 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 673 SizeOfPredicates, 6 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 1/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...