java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf -i ../../../trunk/examples/programs/toy/nonlinear/Power2-Unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 18:20:14,266 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 18:20:14,268 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 18:20:14,281 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 18:20:14,281 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 18:20:14,282 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 18:20:14,284 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 18:20:14,285 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 18:20:14,287 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 18:20:14,288 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 18:20:14,289 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 18:20:14,289 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 18:20:14,290 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 18:20:14,291 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 18:20:14,292 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 18:20:14,293 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 18:20:14,294 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 18:20:14,296 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 18:20:14,298 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 18:20:14,300 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 18:20:14,301 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 18:20:14,302 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 18:20:14,304 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-12-03 18:20:14,314 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf [2018-12-03 18:20:14,327 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 18:20:14,327 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 18:20:14,328 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 18:20:14,328 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 18:20:14,328 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 18:20:14,328 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 18:20:14,329 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 18:20:14,329 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 18:20:14,329 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 18:20:14,329 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 18:20:14,329 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 18:20:14,330 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 18:20:14,330 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 18:20:14,330 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 18:20:14,331 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 18:20:14,331 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 18:20:14,331 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 18:20:14,331 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 18:20:14,332 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 18:20:14,332 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 18:20:14,332 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 18:20:14,332 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 18:20:14,332 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 18:20:14,332 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 18:20:14,333 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 18:20:14,333 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 18:20:14,333 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 18:20:14,333 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 18:20:14,333 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 18:20:14,334 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 18:20:14,334 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 18:20:14,334 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 18:20:14,334 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 18:20:14,335 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 18:20:14,335 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 18:20:14,335 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 18:20:14,335 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 18:20:14,335 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 18:20:14,335 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 18:20:14,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 18:20:14,379 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 18:20:14,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 18:20:14,387 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 18:20:14,388 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 18:20:14,389 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Power2-Unsafe.bpl [2018-12-03 18:20:14,389 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Power2-Unsafe.bpl' [2018-12-03 18:20:14,425 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 18:20:14,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 18:20:14,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 18:20:14,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 18:20:14,429 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 18:20:14,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,466 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 18:20:14,466 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 18:20:14,467 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 18:20:14,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 18:20:14,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 18:20:14,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 18:20:14,471 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 18:20:14,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/1) ... [2018-12-03 18:20:14,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 18:20:14,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 18:20:14,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 18:20:14,500 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 18:20:14,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (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 18:20:14,585 INFO L124 BoogieDeclarations]: Specification and implementation of procedure power given in one single declaration [2018-12-03 18:20:14,586 INFO L130 BoogieDeclarations]: Found specification of procedure power [2018-12-03 18:20:14,586 INFO L138 BoogieDeclarations]: Found implementation of procedure power [2018-12-03 18:20:14,665 WARN L615 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-12-03 18:20:14,835 INFO L272 CfgBuilder]: Using library mode [2018-12-03 18:20:14,835 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 18:20:14,836 INFO L202 PluginConnector]: Adding new model Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:20:14 BoogieIcfgContainer [2018-12-03 18:20:14,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 18:20:14,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 18:20:14,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 18:20:14,841 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 18:20:14,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 06:20:14" (1/2) ... [2018-12-03 18:20:14,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36808b2f and model type Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:20:14, skipping insertion in model container [2018-12-03 18:20:14,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:20:14" (2/2) ... [2018-12-03 18:20:14,846 INFO L112 eAbstractionObserver]: Analyzing ICFG Power2-Unsafe.bpl [2018-12-03 18:20:14,856 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 18:20:14,866 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 18:20:14,886 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 18:20:14,927 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 18:20:14,927 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 18:20:14,927 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 18:20:14,928 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 18:20:14,928 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 18:20:14,928 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 18:20:14,928 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 18:20:14,928 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 18:20:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 18:20:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 18:20:14,951 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:20:14,952 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 18:20:14,954 INFO L423 AbstractCegarLoop]: === Iteration 1 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 18:20:14,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:20:14,962 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-12-03 18:20:14,965 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:20:15,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:20:15,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:20:15,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:20:15,020 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:20:15,052 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 18:20:15,052 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 18:20:15,052 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 18:20:15,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:20:15,064 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 18:20:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:20:15,094 INFO L193 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-12-03 18:20:15,096 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 18:20:15,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:20:15,096 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 18:20:15,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:20:15,112 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:20:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:20:15,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:20:15,391 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 18:20:15,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:20:17,550 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 18:20:17,570 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-12-03 18:20:17,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2018-12-03 18:20:17,571 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 18:20:17,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 18:20:17,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 18:20:17,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2018-12-03 18:20:17,591 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-12-03 18:20:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:20:17,723 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-03 18:20:17,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 18:20:17,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-03 18:20:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:20:17,737 INFO L225 Difference]: With dead ends: 10 [2018-12-03 18:20:17,737 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 18:20:17,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2018-12-03 18:20:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 18:20:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 18:20:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 18:20:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 18:20:17,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 18:20:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:20:17,779 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 18:20:17,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 18:20:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 18:20:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 18:20:17,780 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:20:17,780 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-03 18:20:17,781 INFO L423 AbstractCegarLoop]: === Iteration 2 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 18:20:17,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:20:17,782 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-12-03 18:20:17,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:20:17,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:20:17,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:20:17,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:20:17,784 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:20:17,787 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 18:20:17,787 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 18:20:17,788 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 18:20:17,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:20:17,806 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 18:20:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:20:17,856 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-03 18:20:17,859 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9] [2018-12-03 18:20:17,929 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 18:20:17,929 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 18:20:18,219 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 18:20:18,222 INFO L272 AbstractInterpreter]: Visited 5 different actions 14 times. Merged at 3 different actions 8 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 18:20:18,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:20:18,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 18:20:18,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 18:20:18,272 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 18:20:18,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:20:18,284 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 18:20:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 18:20:18,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 18:20:18,651 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 18:20:18,651 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 18:20:18,995 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 18:20:19,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 18:20:19,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-12-03 18:20:19,015 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 18:20:19,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 18:20:19,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 18:20:19,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-12-03 18:20:19,018 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-12-03 18:20:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 18:20:19,096 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 18:20:19,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 18:20:19,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-03 18:20:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 18:20:19,097 INFO L225 Difference]: With dead ends: 9 [2018-12-03 18:20:19,097 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 18:20:19,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-03 18:20:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 18:20:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 18:20:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 18:20:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 18:20:19,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-03 18:20:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 18:20:19,103 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 18:20:19,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 18:20:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 18:20:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 18:20:19,104 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 18:20:19,104 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-03 18:20:19,105 INFO L423 AbstractCegarLoop]: === Iteration 3 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-12-03 18:20:19,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 18:20:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-12-03 18:20:19,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 18:20:19,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:20:19,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 18:20:19,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 18:20:19,107 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 18:20:19,110 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-03 18:20:19,110 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-03 18:20:19,110 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-03 18:20:19,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 18:20:19,129 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-03 18:20:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 18:20:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 18:20:19,174 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-03 18:20:19,192 INFO L202 PluginConnector]: Adding new model Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 06:20:19 BoogieIcfgContainer [2018-12-03 18:20:19,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 18:20:19,194 INFO L168 Benchmark]: Toolchain (without parser) took 4768.00 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: 140.1 MB). Peak memory consumption was 140.1 MB. Max. memory is 7.1 GB. [2018-12-03 18:20:19,196 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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 18:20:19,197 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.92 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 18:20:19,197 INFO L168 Benchmark]: Boogie Preprocessor took 28.76 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 18:20:19,198 INFO L168 Benchmark]: RCFGBuilder took 336.54 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 18:20:19,199 INFO L168 Benchmark]: TraceAbstraction took 4355.43 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: 119.0 MB). Peak memory consumption was 119.0 MB. Max. memory is 7.1 GB. [2018-12-03 18:20:19,203 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 0.23 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 41.92 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 28.76 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 336.54 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 4355.43 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: 119.0 MB). Peak memory consumption was 119.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: procedure postcondition can be violated procedure postcondition can be violated We found a FailurePath: [L9-L10] requires a >= 1 && b >= 0; VAL [a=1, b=2] [L15] res := 1; [L16] tmp := b; VAL [a=1, b=2, res=1, tmp=2] [L18] COND TRUE tmp > 0 [L20] res := res * a; [L21] tmp := tmp - 1; VAL [a=1, b=2, res=1, tmp=1] [L18] COND TRUE tmp > 0 [L20] res := res * a; [L21] tmp := tmp - 1; VAL [a=1, b=2, res=1, tmp=0] [L18] COND FALSE !(tmp > 0) VAL [a=1, b=2, res=1, tmp=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. UNSAFE Result, 4.2s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3 SDtfs, 18 SDslu, 1 SDs, 0 SdLazy, 37 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 14 ConstructedInterpolants, 4 QuantifiedInterpolants, 442 SizeOfPredicates, 4 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...