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/nested.c_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:37:53,844 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:37:53,845 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:37:53,862 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 15:37:53,862 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 15:37:53,863 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 15:37:53,864 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 15:37:53,866 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 15:37:53,868 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 15:37:53,869 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 15:37:53,870 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 15:37:53,897 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 15:37:53,917 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:37:53,917 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:37:53,918 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:37:53,918 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:37:53,918 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:37:53,918 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:37:53,919 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:37:53,919 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:37:53,919 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:37:53,919 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:37:53,919 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:37:53,920 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:37:53,920 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:37:53,920 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:37:53,920 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:37:53,921 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:37:53,921 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:37:53,921 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:37:53,921 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:37:53,922 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:37:53,922 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:37:53,922 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:37:53,922 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:37:53,922 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:37:53,923 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:37:53,923 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:37:53,923 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:37:53,923 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:37:53,923 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:37:53,924 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:37:53,924 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:37:53,924 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:37:53,924 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:37:53,924 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:37:53,925 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:37:53,925 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:37:53,925 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:37:53,926 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:37:53,926 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:37:53,926 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:37:53,926 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:37:53,982 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:37:53,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:37:54,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:37:54,004 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:37:54,005 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:37:54,008 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.c_4.bpl [2018-12-03 15:37:54,008 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.c_4.bpl' [2018-12-03 15:37:54,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:37:54,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:37:54,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:37:54,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:37:54,062 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:37:54,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:37:54,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:37:54,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:37:54,103 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:37:54,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/1) ... [2018-12-03 15:37:54,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:37:54,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:37:54,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:37:54,133 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:37:54,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (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 15:37:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 15:37:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 15:37:54,462 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 15:37:54,462 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-03 15:37:54,462 INFO L202 PluginConnector]: Adding new model nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:37:54 BoogieIcfgContainer [2018-12-03 15:37:54,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:37:54,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:37:54,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:37:54,467 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:37:54,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:37:54" (1/2) ... [2018-12-03 15:37:54,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f654d6b and model type nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:37:54, skipping insertion in model container [2018-12-03 15:37:54,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:37:54" (2/2) ... [2018-12-03 15:37:54,471 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.c_4.bpl [2018-12-03 15:37:54,482 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:37:54,490 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:37:54,506 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:37:54,539 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:37:54,540 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:37:54,540 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:37:54,540 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:37:54,540 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:37:54,540 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:37:54,541 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:37:54,541 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:37:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 15:37:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 15:37:54,564 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:37:54,565 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 15:37:54,567 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:37:54,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:37:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-12-03 15:37:54,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:37:54,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:37:54,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:37:54,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:37:54,625 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:37:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:37:54,727 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 15:37:54,729 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:37:54,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:37:54,730 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:37:54,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:37:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:37:54,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:37:54,750 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-03 15:37:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:37:54,786 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-03 15:37:54,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:37:54,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 15:37:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:37:54,808 INFO L225 Difference]: With dead ends: 9 [2018-12-03 15:37:54,808 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 15:37:54,811 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 15:37:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 15:37:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 15:37:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 15:37:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 15:37:54,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 15:37:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:37:54,849 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 15:37:54,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:37:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 15:37:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 15:37:54,850 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:37:54,850 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 15:37:54,850 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:37:54,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:37:54,851 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-12-03 15:37:54,851 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:37:54,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:37:54,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:37:54,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:37:54,853 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:37:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:37:55,010 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 15:37:55,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:37:55,011 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:37:55,012 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 15:37:55,014 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-03 15:37:55,066 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:37:55,066 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:37:55,193 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 15:37:55,194 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 15:37:55,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:37:55,242 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 15:37:55,326 INFO L227 lantSequenceWeakener]: Weakened 1 states. On average, predicates are now at 20% of their original sizes. [2018-12-03 15:37:55,326 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 15:37:55,426 INFO L418 sIntCurrentIteration]: We unified 3 AI predicates to 3 [2018-12-03 15:37:55,426 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 15:37:55,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 15:37:55,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-12-03 15:37:55,428 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:37:55,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 15:37:55,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 15:37:55,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 15:37:55,430 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-12-03 15:37:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:37:55,495 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-03 15:37:55,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:37:55,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-03 15:37:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:37:55,498 INFO L225 Difference]: With dead ends: 5 [2018-12-03 15:37:55,498 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 15:37:55,500 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 3 GetRequests, 1 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 15:37:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 15:37:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 15:37:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 15:37:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 15:37:55,503 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2018-12-03 15:37:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:37:55,504 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 15:37:55,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 15:37:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 15:37:55,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 15:37:55,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 15:37:55,655 WARN L180 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-12-03 15:37:55,658 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 3 64) no Hoare annotation was computed. [2018-12-03 15:37:55,658 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 3 64) no Hoare annotation was computed. [2018-12-03 15:37:55,659 INFO L444 ceAbstractionStarter]: At program point L61(lines 36 61) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~b~5 0)) (.cse1 (= ULTIMATE.start_main_~a~5 0))) (or (and (= ULTIMATE.start_main_~c~5 1) (= ~last 0) .cse0 .cse1 (= ULTIMATE.start_main_~st~5 0)) (and (= ULTIMATE.start_main_~c~5 0) (= ULTIMATE.start_main_~st~5 1) .cse0 .cse1))) [2018-12-03 15:37:55,659 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 3 64) no Hoare annotation was computed. [2018-12-03 15:37:55,659 INFO L444 ceAbstractionStarter]: At program point L53(lines 53 62) the Hoare annotation is: false [2018-12-03 15:37:55,659 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 63) no Hoare annotation was computed. [2018-12-03 15:37:55,669 INFO L202 PluginConnector]: Adding new model nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:37:55 BoogieIcfgContainer [2018-12-03 15:37:55,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 15:37:55,670 INFO L168 Benchmark]: Toolchain (without parser) took 1609.93 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-12-03 15:37:55,672 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.32 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 15:37:55,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.59 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 15:37:55,673 INFO L168 Benchmark]: Boogie Preprocessor took 29.32 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 15:37:55,674 INFO L168 Benchmark]: RCFGBuilder took 329.97 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 15:37:55,675 INFO L168 Benchmark]: TraceAbstraction took 1205.63 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-12-03 15:37:55,682 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 0.32 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 40.59 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 29.32 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 329.97 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 1205.63 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 63]: 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: 53]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((main_~c~5 == 1 && ~last == 0) && main_~b~5 == 0) && main_~a~5 == 0) && main_~st~5 == 0) || (((main_~c~5 == 0 && main_~st~5 == 1) && main_~b~5 == 0) && main_~a~5 == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 1.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 5 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 0.2s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.7333333333333334 AbsIntWeakeningRatio, 1.3333333333333333 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 3 NumberOfFragments, 31 HoareAnnotationTreeSize, 2 FomulaSimplifications, 34 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 29 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...