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/toy/tooDifficultLoopInvariant/INT_add_vs_inc.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:49:16,943 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:49:16,947 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:49:16,966 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-03 15:49:17,016 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 15:49:17,032 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:49:17,032 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:49:17,033 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:49:17,034 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:49:17,034 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:49:17,034 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:49:17,034 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:49:17,034 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:49:17,035 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:49:17,035 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:49:17,035 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:49:17,035 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:49:17,035 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:49:17,036 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:49:17,036 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:49:17,037 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:49:17,037 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:49:17,037 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:49:17,037 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:49:17,038 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:49:17,038 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:49:17,038 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:49:17,038 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:49:17,038 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:49:17,039 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:49:17,039 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:49:17,039 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:49:17,039 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:49:17,039 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:49:17,040 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:49:17,040 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:49:17,040 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:49:17,040 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:49:17,040 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:49:17,041 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:49:17,041 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:49:17,041 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:49:17,041 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:49:17,041 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:49:17,042 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:49:17,042 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:49:17,090 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:49:17,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:49:17,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:49:17,112 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:49:17,113 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:49:17,113 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/INT_add_vs_inc.bpl [2018-12-03 15:49:17,114 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/INT_add_vs_inc.bpl' [2018-12-03 15:49:17,151 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:49:17,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:49:17,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:49:17,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:49:17,156 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:49:17,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,190 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 15:49:17,190 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 15:49:17,190 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 15:49:17,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:49:17,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:49:17,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:49:17,194 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:49:17,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/1) ... [2018-12-03 15:49:17,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:49:17,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:49:17,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:49:17,220 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:49:17,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (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 15:49:17,288 INFO L124 BoogieDeclarations]: Specification and implementation of procedure add given in one single declaration [2018-12-03 15:49:17,289 INFO L130 BoogieDeclarations]: Found specification of procedure add [2018-12-03 15:49:17,289 INFO L138 BoogieDeclarations]: Found implementation of procedure add [2018-12-03 15:49:17,450 INFO L272 CfgBuilder]: Using library mode [2018-12-03 15:49:17,450 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 15:49:17,451 INFO L202 PluginConnector]: Adding new model INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:49:17 BoogieIcfgContainer [2018-12-03 15:49:17,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:49:17,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:49:17,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:49:17,456 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:49:17,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:49:17" (1/2) ... [2018-12-03 15:49:17,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bad06b and model type INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:49:17, skipping insertion in model container [2018-12-03 15:49:17,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:49:17" (2/2) ... [2018-12-03 15:49:17,460 INFO L112 eAbstractionObserver]: Analyzing ICFG INT_add_vs_inc.bpl [2018-12-03 15:49:17,470 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:49:17,481 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:49:17,498 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:49:17,528 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:49:17,529 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:49:17,529 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:49:17,529 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:49:17,529 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:49:17,529 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:49:17,530 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:49:17,530 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:49:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 15:49:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 15:49:17,551 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:49:17,552 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 15:49:17,555 INFO L423 AbstractCegarLoop]: === Iteration 1 === [addErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:49:17,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:49:17,560 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2018-12-03 15:49:17,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:49:17,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:49:17,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:49:17,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:49:17,611 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:49:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:49:18,029 WARN L180 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-12-03 15:49:18,113 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 15:49:18,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:49:18,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:49:18,116 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:49:18,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 15:49:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 15:49:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 15:49:18,134 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-12-03 15:49:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:49:18,218 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-12-03 15:49:18,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 15:49:18,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-03 15:49:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:49:18,231 INFO L225 Difference]: With dead ends: 11 [2018-12-03 15:49:18,232 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 15:49:18,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-03 15:49:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 15:49:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 15:49:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 15:49:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 15:49:18,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 15:49:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:49:18,266 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 15:49:18,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 15:49:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 15:49:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 15:49:18,267 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:49:18,267 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 15:49:18,267 INFO L423 AbstractCegarLoop]: === Iteration 2 === [addErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:49:18,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:49:18,268 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2018-12-03 15:49:18,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:49:18,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:49:18,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:49:18,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:49:18,269 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:49:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:49:18,586 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-12-03 15:49:18,689 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 15:49:18,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:49:18,690 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:49:18,692 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 15:49:18,694 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [7] [2018-12-03 15:49:18,730 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:49:18,730 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:49:18,818 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 15:49:18,821 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 15:49:18,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:49:18,836 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 15:49:18,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:49:18,836 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 15:49:18,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:49:18,847 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:49:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:49:18,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:49:18,967 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 15:49:18,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:49:19,154 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-12-03 15:49:19,273 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 15:49:19,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:49:19,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-03 15:49:19,298 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:49:19,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 15:49:19,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 15:49:19,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-12-03 15:49:19,300 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 7 states. [2018-12-03 15:49:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:49:19,633 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-03 15:49:19,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 15:49:19,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 4 [2018-12-03 15:49:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:49:19,635 INFO L225 Difference]: With dead ends: 8 [2018-12-03 15:49:19,635 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 15:49:19,636 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-03 15:49:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 15:49:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 15:49:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 15:49:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 15:49:19,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 15:49:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:49:19,641 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 15:49:19,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 15:49:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 15:49:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 15:49:19,642 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:49:19,642 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-03 15:49:19,642 INFO L423 AbstractCegarLoop]: === Iteration 3 === [addErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:49:19,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:49:19,643 INFO L82 PathProgramCache]: Analyzing trace with hash 28752352, now seen corresponding path program 2 times [2018-12-03 15:49:19,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:49:19,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:49:19,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:49:19,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:49:19,645 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:49:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:49:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:49:19,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:49:19,892 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:49:19,893 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:49:19,893 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:49:19,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:49:19,893 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 15:49:19,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:49:19,907 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:49:19,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-03 15:49:19,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:49:19,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:49:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:49:20,014 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:49:20,299 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-12-03 15:49:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:49:20,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:49:20,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-03 15:49:20,430 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:49:20,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 15:49:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 15:49:20,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-12-03 15:49:20,432 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 9 states. [2018-12-03 15:49:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:49:20,651 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2018-12-03 15:49:20,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 15:49:20,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-12-03 15:49:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:49:20,652 INFO L225 Difference]: With dead ends: 8 [2018-12-03 15:49:20,652 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 15:49:20,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2018-12-03 15:49:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 15:49:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 15:49:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 15:49:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 15:49:20,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2018-12-03 15:49:20,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:49:20,655 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 15:49:20,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 15:49:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 15:49:20,656 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 15:49:20,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 15:49:20,743 INFO L448 ceAbstractionStarter]: For program point addEXIT(lines 8 24) no Hoare annotation was computed. [2018-12-03 15:49:20,743 INFO L444 ceAbstractionStarter]: At program point L17-1(lines 17 21) the Hoare annotation is: (let ((.cse0 (+ add_x add_y0)) (.cse1 (+ add_y add_result))) (and (<= add_result .cse0) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2018-12-03 15:49:20,744 INFO L448 ceAbstractionStarter]: For program point addErr0ASSERT_VIOLATIONASSERT(line 23) no Hoare annotation was computed. [2018-12-03 15:49:20,744 INFO L448 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-12-03 15:49:20,744 INFO L448 ceAbstractionStarter]: For program point addENTRY(lines 8 24) no Hoare annotation was computed. [2018-12-03 15:49:20,744 INFO L448 ceAbstractionStarter]: For program point addFINAL(lines 8 24) no Hoare annotation was computed. [2018-12-03 15:49:20,754 INFO L202 PluginConnector]: Adding new model INT_add_vs_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:49:20 BoogieIcfgContainer [2018-12-03 15:49:20,754 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 15:49:20,755 INFO L168 Benchmark]: Toolchain (without parser) took 3602.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 150.7 MB). Peak memory consumption was 150.7 MB. Max. memory is 7.1 GB. [2018-12-03 15:49:20,756 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:49:20,757 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.54 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 15:49:20,758 INFO L168 Benchmark]: Boogie Preprocessor took 22.97 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 15:49:20,758 INFO L168 Benchmark]: RCFGBuilder took 231.26 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 15:49:20,759 INFO L168 Benchmark]: TraceAbstraction took 3301.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 129.6 MB). Peak memory consumption was 129.6 MB. Max. memory is 7.1 GB. [2018-12-03 15:49:20,764 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.54 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 22.97 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 231.26 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 3301.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 129.6 MB). Peak memory consumption was 129.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: 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: 17]: Loop Invariant Derived loop invariant: (result <= x + y0 && y + result <= x + y0) && x + y0 <= y + result - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 3.2s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6 SDtfs, 11 SDslu, 2 SDs, 0 SdLazy, 50 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 0 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.2s 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, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 4 NumberOfFragments, 20 HoareAnnotationTreeSize, 1 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 79 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 1098 SizeOfPredicates, 2 NumberOfNonLiveVariables, 33 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...