java -ea -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/n.c11.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c30ebe1 [2018-12-17 14:12:23,400 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-17 14:12:23,403 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-17 14:12:23,415 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-17 14:12:23,451 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 [2018-12-17 14:12:23,464 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-17 14:12:23,465 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-17 14:12:23,466 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-17 14:12:23,466 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-17 14:12:23,466 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-17 14:12:23,467 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-17 14:12:23,467 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-17 14:12:23,467 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-17 14:12:23,467 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-17 14:12:23,468 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-17 14:12:23,468 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-17 14:12:23,468 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-17 14:12:23,468 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-17 14:12:23,469 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-17 14:12:23,469 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-17 14:12:23,469 INFO L133 SettingsManager]: * Use SBE=true [2018-12-17 14:12:23,470 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-17 14:12:23,470 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-17 14:12:23,470 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-17 14:12:23,470 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-17 14:12:23,470 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-17 14:12:23,471 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-17 14:12:23,471 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-17 14:12:23,471 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-17 14:12:23,471 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-17 14:12:23,471 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-17 14:12:23,472 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-17 14:12:23,472 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-17 14:12:23,472 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-17 14:12:23,472 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-17 14:12:23,473 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-17 14:12:23,473 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-17 14:12:23,473 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-17 14:12:23,473 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-17 14:12:23,473 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-17 14:12:23,474 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-17 14:12:23,474 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-17 14:12:23,474 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-17 14:12:23,474 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-17 14:12:23,505 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-17 14:12:23,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-17 14:12:23,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-17 14:12:23,523 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-17 14:12:23,524 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-17 14:12:23,525 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl [2018-12-17 14:12:23,525 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl' [2018-12-17 14:12:23,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-17 14:12:23,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-17 14:12:23,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-17 14:12:23,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-17 14:12:23,574 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-17 14:12:23,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-17 14:12:23,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-17 14:12:23,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-17 14:12:23,617 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-17 14:12:23,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/1) ... [2018-12-17 14:12:23,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-17 14:12:23,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-17 14:12:23,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-17 14:12:23,646 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-17 14:12:23,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (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 [2018-12-17 14:12:23,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-17 14:12:23,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-17 14:12:24,071 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-17 14:12:24,071 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-17 14:12:24,072 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:12:24 BoogieIcfgContainer [2018-12-17 14:12:24,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-17 14:12:24,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-17 14:12:24,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-17 14:12:24,077 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-17 14:12:24,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.12 02:12:23" (1/2) ... [2018-12-17 14:12:24,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d77b6f and model type n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:12:24, skipping insertion in model container [2018-12-17 14:12:24,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:12:24" (2/2) ... [2018-12-17 14:12:24,081 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11.i_3.bpl [2018-12-17 14:12:24,092 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-17 14:12:24,101 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-17 14:12:24,120 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-17 14:12:24,158 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-17 14:12:24,158 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-17 14:12:24,159 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-17 14:12:24,159 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-17 14:12:24,159 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-17 14:12:24,159 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-17 14:12:24,160 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-17 14:12:24,160 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-17 14:12:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-17 14:12:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-17 14:12:24,184 INFO L394 BasicCegarLoop]: Found error trace [2018-12-17 14:12:24,185 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-17 14:12:24,188 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-17 14:12:24,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:24,195 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-12-17 14:12:24,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-17 14:12:24,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:24,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:24,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:24,256 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-17 14:12:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:24,620 INFO L273 TraceCheckUtils]: 0: Hoare triple {9#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {11#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:24,633 INFO L273 TraceCheckUtils]: 1: Hoare triple {11#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {10#false} is VALID [2018-12-17 14:12:24,633 INFO L273 TraceCheckUtils]: 2: Hoare triple {10#false} assume !false; {10#false} is VALID [2018-12-17 14:12:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:24,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-17 14:12:24,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-17 14:12:24,641 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-17 14:12:24,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-17 14:12:24,649 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-17 14:12:24,653 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2018-12-17 14:12:24,691 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 3 edges. 3 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:24,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-17 14:12:24,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-17 14:12:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-17 14:12:24,703 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-17 14:12:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:24,818 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-17 14:12:24,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-17 14:12:24,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-17 14:12:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-17 14:12:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-17 14:12:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2018-12-17 14:12:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-12-17 14:12:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2018-12-17 14:12:24,828 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 10 transitions. [2018-12-17 14:12:24,862 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:24,873 INFO L225 Difference]: With dead ends: 9 [2018-12-17 14:12:24,873 INFO L226 Difference]: Without dead ends: 5 [2018-12-17 14:12:24,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-17 14:12:24,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-17 14:12:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-17 14:12:24,983 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-17 14:12:24,984 INFO L82 GeneralOperation]: Start isEquivalent. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:24,985 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:24,985 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:24,987 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-17 14:12:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-17 14:12:24,987 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:24,987 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:24,988 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:24,988 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2018-12-17 14:12:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:24,989 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2018-12-17 14:12:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-17 14:12:24,990 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:24,990 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:24,990 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-17 14:12:24,990 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-17 14:12:24,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-17 14:12:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-17 14:12:24,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-17 14:12:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-17 14:12:24,994 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-17 14:12:24,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-17 14:12:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-17 14:12:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-17 14:12:24,995 INFO L394 BasicCegarLoop]: Found error trace [2018-12-17 14:12:24,996 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-17 14:12:24,996 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-17 14:12:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-12-17 14:12:24,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-17 14:12:24,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:24,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:24,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:24,998 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-17 14:12:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:25,467 INFO L273 TraceCheckUtils]: 0: Hoare triple {45#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {47#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:25,477 INFO L273 TraceCheckUtils]: 1: Hoare triple {47#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {48#(and (< 0 (+ (div ULTIMATE.start_main_~len~5 4294967296) 1)) (<= ULTIMATE.start_main_~len~5 1))} is VALID [2018-12-17 14:12:25,491 INFO L273 TraceCheckUtils]: 2: Hoare triple {48#(and (< 0 (+ (div ULTIMATE.start_main_~len~5 4294967296) 1)) (<= ULTIMATE.start_main_~len~5 1))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {46#false} is VALID [2018-12-17 14:12:25,491 INFO L273 TraceCheckUtils]: 3: Hoare triple {46#false} assume !false; {46#false} is VALID [2018-12-17 14:12:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:25,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:25,492 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-17 14:12:25,494 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-17 14:12:25,495 INFO L207 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-17 14:12:25,540 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-17 14:12:25,540 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-17 14:12:25,911 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-17 14:12:25,912 INFO L272 AbstractInterpreter]: Visited 4 different actions 13 times. Merged at 3 different actions 9 times. Widened at 1 different actions 1 times. Performed 134 root evaluator evaluations with a maximum evaluation depth of 5. Performed 134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-17 14:12:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:25,921 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-17 14:12:25,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:25,922 INFO L193 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 [2018-12-17 14:12:25,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:25,943 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-17 14:12:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:25,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-17 14:12:26,180 INFO L273 TraceCheckUtils]: 0: Hoare triple {45#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {47#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:26,183 INFO L273 TraceCheckUtils]: 1: Hoare triple {47#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {55#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} is VALID [2018-12-17 14:12:26,185 INFO L273 TraceCheckUtils]: 2: Hoare triple {55#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {46#false} is VALID [2018-12-17 14:12:26,185 INFO L273 TraceCheckUtils]: 3: Hoare triple {46#false} assume !false; {46#false} is VALID [2018-12-17 14:12:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:26,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-17 14:12:26,436 INFO L273 TraceCheckUtils]: 3: Hoare triple {46#false} assume !false; {46#false} is VALID [2018-12-17 14:12:26,451 INFO L273 TraceCheckUtils]: 2: Hoare triple {65#(< (mod ULTIMATE.start_main_~len~5 4294967296) 5)} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {46#false} is VALID [2018-12-17 14:12:26,467 INFO L273 TraceCheckUtils]: 1: Hoare triple {69#(< (mod (+ ULTIMATE.start_main_~len~5 1) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {65#(< (mod ULTIMATE.start_main_~len~5 4294967296) 5)} is VALID [2018-12-17 14:12:26,479 INFO L273 TraceCheckUtils]: 0: Hoare triple {45#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {69#(< (mod (+ ULTIMATE.start_main_~len~5 1) 4294967296) 5)} is VALID [2018-12-17 14:12:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:26,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-17 14:12:26,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2018-12-17 14:12:26,504 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-17 14:12:26,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-17 14:12:26,505 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-17 14:12:26,506 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2018-12-17 14:12:26,549 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 6 edges. 6 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:26,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-17 14:12:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-17 14:12:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-17 14:12:26,551 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-12-17 14:12:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:26,676 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-17 14:12:26,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-17 14:12:26,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-17 14:12:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-17 14:12:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-17 14:12:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2018-12-17 14:12:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-17 14:12:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2018-12-17 14:12:26,680 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 8 transitions. [2018-12-17 14:12:26,702 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:26,703 INFO L225 Difference]: With dead ends: 8 [2018-12-17 14:12:26,703 INFO L226 Difference]: Without dead ends: 6 [2018-12-17 14:12:26,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-17 14:12:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-17 14:12:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-17 14:12:26,718 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-17 14:12:26,718 INFO L82 GeneralOperation]: Start isEquivalent. First operand 6 states. Second operand 6 states. [2018-12-17 14:12:26,718 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states. [2018-12-17 14:12:26,718 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states. [2018-12-17 14:12:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:26,719 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-12-17 14:12:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-17 14:12:26,720 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:26,720 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:26,720 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states. [2018-12-17 14:12:26,721 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states. [2018-12-17 14:12:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:26,722 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-12-17 14:12:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-17 14:12:26,722 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:26,722 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:26,723 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-17 14:12:26,723 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-17 14:12:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-17 14:12:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-17 14:12:26,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-17 14:12:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-17 14:12:26,724 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-17 14:12:26,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-17 14:12:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-17 14:12:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-17 14:12:26,725 INFO L394 BasicCegarLoop]: Found error trace [2018-12-17 14:12:26,725 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-17 14:12:26,726 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-17 14:12:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-12-17 14:12:26,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-17 14:12:26,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:26,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:26,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:26,728 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-17 14:12:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:27,036 INFO L273 TraceCheckUtils]: 0: Hoare triple {107#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {109#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:27,038 INFO L273 TraceCheckUtils]: 1: Hoare triple {109#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {110#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} is VALID [2018-12-17 14:12:27,043 INFO L273 TraceCheckUtils]: 2: Hoare triple {110#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {111#(and (<= ULTIMATE.start_main_~len~5 2) (< 0 (+ (div ULTIMATE.start_main_~len~5 4294967296) 1)))} is VALID [2018-12-17 14:12:27,044 INFO L273 TraceCheckUtils]: 3: Hoare triple {111#(and (<= ULTIMATE.start_main_~len~5 2) (< 0 (+ (div ULTIMATE.start_main_~len~5 4294967296) 1)))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {108#false} is VALID [2018-12-17 14:12:27,044 INFO L273 TraceCheckUtils]: 4: Hoare triple {108#false} assume !false; {108#false} is VALID [2018-12-17 14:12:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:27,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:27,045 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-17 14:12:27,045 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-17 14:12:27,045 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-17 14:12:27,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:27,046 INFO L193 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 [2018-12-17 14:12:27,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-17 14:12:27,056 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-17 14:12:27,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-17 14:12:27,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-17 14:12:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:27,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-17 14:12:27,470 INFO L273 TraceCheckUtils]: 0: Hoare triple {107#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {109#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:27,472 INFO L273 TraceCheckUtils]: 1: Hoare triple {109#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {110#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} is VALID [2018-12-17 14:12:27,473 INFO L273 TraceCheckUtils]: 2: Hoare triple {110#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {121#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:27,490 INFO L273 TraceCheckUtils]: 3: Hoare triple {121#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {108#false} is VALID [2018-12-17 14:12:27,490 INFO L273 TraceCheckUtils]: 4: Hoare triple {108#false} assume !false; {108#false} is VALID [2018-12-17 14:12:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:27,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-17 14:12:27,607 INFO L273 TraceCheckUtils]: 4: Hoare triple {108#false} assume !false; {108#false} is VALID [2018-12-17 14:12:27,609 INFO L273 TraceCheckUtils]: 3: Hoare triple {131#(< (mod ULTIMATE.start_main_~len~5 4294967296) 5)} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {108#false} is VALID [2018-12-17 14:12:27,611 INFO L273 TraceCheckUtils]: 2: Hoare triple {135#(< (mod (+ ULTIMATE.start_main_~len~5 1) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {131#(< (mod ULTIMATE.start_main_~len~5 4294967296) 5)} is VALID [2018-12-17 14:12:27,613 INFO L273 TraceCheckUtils]: 1: Hoare triple {139#(< (mod (+ ULTIMATE.start_main_~len~5 2) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {135#(< (mod (+ ULTIMATE.start_main_~len~5 1) 4294967296) 5)} is VALID [2018-12-17 14:12:27,614 INFO L273 TraceCheckUtils]: 0: Hoare triple {107#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {139#(< (mod (+ ULTIMATE.start_main_~len~5 2) 4294967296) 5)} is VALID [2018-12-17 14:12:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:27,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-17 14:12:27,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2018-12-17 14:12:27,636 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-17 14:12:27,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-12-17 14:12:27,636 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-17 14:12:27,637 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2018-12-17 14:12:27,645 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 7 edges. 7 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:27,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-17 14:12:27,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-17 14:12:27,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-12-17 14:12:27,646 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-12-17 14:12:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:27,752 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-17 14:12:27,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-17 14:12:27,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-12-17 14:12:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-17 14:12:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-17 14:12:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 9 transitions. [2018-12-17 14:12:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-17 14:12:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 9 transitions. [2018-12-17 14:12:27,757 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 9 transitions. [2018-12-17 14:12:27,793 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 9 edges. 9 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:27,794 INFO L225 Difference]: With dead ends: 9 [2018-12-17 14:12:27,794 INFO L226 Difference]: Without dead ends: 7 [2018-12-17 14:12:27,795 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-12-17 14:12:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-17 14:12:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-17 14:12:27,803 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-17 14:12:27,803 INFO L82 GeneralOperation]: Start isEquivalent. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:27,803 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:27,803 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:27,804 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-12-17 14:12:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-17 14:12:27,805 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:27,805 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:27,805 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:27,805 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 7 states. [2018-12-17 14:12:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:27,806 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-12-17 14:12:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-17 14:12:27,807 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:27,807 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:27,807 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-17 14:12:27,807 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-17 14:12:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-17 14:12:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-17 14:12:27,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-17 14:12:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-17 14:12:27,809 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-17 14:12:27,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-17 14:12:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-17 14:12:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-17 14:12:27,810 INFO L394 BasicCegarLoop]: Found error trace [2018-12-17 14:12:27,810 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-12-17 14:12:27,810 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-17 14:12:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:27,811 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-12-17 14:12:27,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-17 14:12:27,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:27,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-17 14:12:27,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:27,812 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-17 14:12:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:28,039 INFO L273 TraceCheckUtils]: 0: Hoare triple {183#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {185#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:28,041 INFO L273 TraceCheckUtils]: 1: Hoare triple {185#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {186#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} is VALID [2018-12-17 14:12:28,043 INFO L273 TraceCheckUtils]: 2: Hoare triple {186#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {187#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:28,045 INFO L273 TraceCheckUtils]: 3: Hoare triple {187#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {188#(and (< 0 (+ (div ULTIMATE.start_main_~len~5 4294967296) 1)) (<= ULTIMATE.start_main_~len~5 3))} is VALID [2018-12-17 14:12:28,046 INFO L273 TraceCheckUtils]: 4: Hoare triple {188#(and (< 0 (+ (div ULTIMATE.start_main_~len~5 4294967296) 1)) (<= ULTIMATE.start_main_~len~5 3))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {184#false} is VALID [2018-12-17 14:12:28,047 INFO L273 TraceCheckUtils]: 5: Hoare triple {184#false} assume !false; {184#false} is VALID [2018-12-17 14:12:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:28,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:28,048 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-17 14:12:28,049 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-17 14:12:28,049 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-17 14:12:28,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:28,049 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-17 14:12:28,058 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-17 14:12:28,059 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-17 14:12:28,067 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-17 14:12:28,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-17 14:12:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:28,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-17 14:12:28,158 INFO L273 TraceCheckUtils]: 0: Hoare triple {183#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {185#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:28,159 INFO L273 TraceCheckUtils]: 1: Hoare triple {185#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {186#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} is VALID [2018-12-17 14:12:28,161 INFO L273 TraceCheckUtils]: 2: Hoare triple {186#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {187#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:28,163 INFO L273 TraceCheckUtils]: 3: Hoare triple {187#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {201#(and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:28,168 INFO L273 TraceCheckUtils]: 4: Hoare triple {201#(and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {184#false} is VALID [2018-12-17 14:12:28,168 INFO L273 TraceCheckUtils]: 5: Hoare triple {184#false} assume !false; {184#false} is VALID [2018-12-17 14:12:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:28,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-17 14:12:28,281 INFO L273 TraceCheckUtils]: 5: Hoare triple {184#false} assume !false; {184#false} is VALID [2018-12-17 14:12:28,283 INFO L273 TraceCheckUtils]: 4: Hoare triple {211#(< (mod ULTIMATE.start_main_~len~5 4294967296) 5)} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {184#false} is VALID [2018-12-17 14:12:28,284 INFO L273 TraceCheckUtils]: 3: Hoare triple {215#(< (mod (+ ULTIMATE.start_main_~len~5 1) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {211#(< (mod ULTIMATE.start_main_~len~5 4294967296) 5)} is VALID [2018-12-17 14:12:28,286 INFO L273 TraceCheckUtils]: 2: Hoare triple {219#(< (mod (+ ULTIMATE.start_main_~len~5 2) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {215#(< (mod (+ ULTIMATE.start_main_~len~5 1) 4294967296) 5)} is VALID [2018-12-17 14:12:28,288 INFO L273 TraceCheckUtils]: 1: Hoare triple {223#(< (mod (+ ULTIMATE.start_main_~len~5 3) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {219#(< (mod (+ ULTIMATE.start_main_~len~5 2) 4294967296) 5)} is VALID [2018-12-17 14:12:28,288 INFO L273 TraceCheckUtils]: 0: Hoare triple {183#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {223#(< (mod (+ ULTIMATE.start_main_~len~5 3) 4294967296) 5)} is VALID [2018-12-17 14:12:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:28,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-17 14:12:28,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-12-17 14:12:28,310 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-17 14:12:28,310 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-12-17 14:12:28,311 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-17 14:12:28,311 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states. [2018-12-17 14:12:28,322 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:28,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-17 14:12:28,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-17 14:12:28,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-12-17 14:12:28,323 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-12-17 14:12:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:28,493 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-17 14:12:28,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-17 14:12:28,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-12-17 14:12:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-17 14:12:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-17 14:12:28,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-12-17 14:12:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-17 14:12:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-12-17 14:12:28,496 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 10 transitions. [2018-12-17 14:12:28,509 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:28,510 INFO L225 Difference]: With dead ends: 10 [2018-12-17 14:12:28,510 INFO L226 Difference]: Without dead ends: 8 [2018-12-17 14:12:28,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-12-17 14:12:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-17 14:12:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-17 14:12:28,523 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-17 14:12:28,523 INFO L82 GeneralOperation]: Start isEquivalent. First operand 8 states. Second operand 8 states. [2018-12-17 14:12:28,523 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2018-12-17 14:12:28,524 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2018-12-17 14:12:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:28,525 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-17 14:12:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-17 14:12:28,525 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:28,525 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:28,525 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2018-12-17 14:12:28,526 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2018-12-17 14:12:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:28,527 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-17 14:12:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-17 14:12:28,527 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:28,527 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:28,528 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-17 14:12:28,528 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-17 14:12:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-17 14:12:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-12-17 14:12:28,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-12-17 14:12:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-17 14:12:28,529 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-12-17 14:12:28,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-17 14:12:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-17 14:12:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-17 14:12:28,530 INFO L394 BasicCegarLoop]: Found error trace [2018-12-17 14:12:28,530 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-12-17 14:12:28,530 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-17 14:12:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-17 14:12:28,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-12-17 14:12:28,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-17 14:12:28,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:28,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-17 14:12:28,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-17 14:12:28,532 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-17 14:12:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:29,106 INFO L273 TraceCheckUtils]: 0: Hoare triple {273#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {275#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:29,194 INFO L273 TraceCheckUtils]: 1: Hoare triple {275#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {276#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} is VALID [2018-12-17 14:12:29,204 INFO L273 TraceCheckUtils]: 2: Hoare triple {276#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {277#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:29,218 INFO L273 TraceCheckUtils]: 3: Hoare triple {277#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {278#(and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:29,231 INFO L273 TraceCheckUtils]: 4: Hoare triple {278#(and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {279#(and (< 0 (+ (div ULTIMATE.start_main_~len~5 4294967296) 1)) (<= ULTIMATE.start_main_~len~5 4))} is VALID [2018-12-17 14:12:29,233 INFO L273 TraceCheckUtils]: 5: Hoare triple {279#(and (< 0 (+ (div ULTIMATE.start_main_~len~5 4294967296) 1)) (<= ULTIMATE.start_main_~len~5 4))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {274#false} is VALID [2018-12-17 14:12:29,234 INFO L273 TraceCheckUtils]: 6: Hoare triple {274#false} assume !false; {274#false} is VALID [2018-12-17 14:12:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:29,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:29,235 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-17 14:12:29,235 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-17 14:12:29,235 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-17 14:12:29,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-17 14:12:29,236 INFO L193 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 [2018-12-17 14:12:29,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-17 14:12:29,251 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-17 14:12:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-17 14:12:29,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-17 14:12:29,537 INFO L273 TraceCheckUtils]: 0: Hoare triple {273#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {275#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:29,539 INFO L273 TraceCheckUtils]: 1: Hoare triple {275#(and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {276#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} is VALID [2018-12-17 14:12:29,540 INFO L273 TraceCheckUtils]: 2: Hoare triple {276#(and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {277#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:29,542 INFO L273 TraceCheckUtils]: 3: Hoare triple {277#(and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {278#(and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5))} is VALID [2018-12-17 14:12:29,543 INFO L273 TraceCheckUtils]: 4: Hoare triple {278#(and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5))} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {295#(and (<= 4 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 4))} is VALID [2018-12-17 14:12:29,545 INFO L273 TraceCheckUtils]: 5: Hoare triple {295#(and (<= 4 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 4))} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {274#false} is VALID [2018-12-17 14:12:29,545 INFO L273 TraceCheckUtils]: 6: Hoare triple {274#false} assume !false; {274#false} is VALID [2018-12-17 14:12:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:29,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-17 14:12:29,893 INFO L273 TraceCheckUtils]: 6: Hoare triple {274#false} assume !false; {274#false} is VALID [2018-12-17 14:12:29,896 INFO L273 TraceCheckUtils]: 5: Hoare triple {305#(< (mod ULTIMATE.start_main_~len~5 4294967296) 5)} assume !(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;__VERIFIER_assert_#in~cond := (if main_~len~5 % 4294967296 >= 0 && main_~len~5 % 4294967296 < 5 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond;assume __VERIFIER_assert_~cond == 0;assume !false; {274#false} is VALID [2018-12-17 14:12:29,897 INFO L273 TraceCheckUtils]: 4: Hoare triple {309#(< (mod (+ ULTIMATE.start_main_~len~5 1) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {305#(< (mod ULTIMATE.start_main_~len~5 4294967296) 5)} is VALID [2018-12-17 14:12:29,898 INFO L273 TraceCheckUtils]: 3: Hoare triple {313#(< (mod (+ ULTIMATE.start_main_~len~5 2) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {309#(< (mod (+ ULTIMATE.start_main_~len~5 1) 4294967296) 5)} is VALID [2018-12-17 14:12:29,900 INFO L273 TraceCheckUtils]: 2: Hoare triple {317#(< (mod (+ ULTIMATE.start_main_~len~5 3) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {313#(< (mod (+ ULTIMATE.start_main_~len~5 2) 4294967296) 5)} is VALID [2018-12-17 14:12:29,901 INFO L273 TraceCheckUtils]: 1: Hoare triple {321#(< (mod (+ ULTIMATE.start_main_~len~5 4) 4294967296) 5)} assume !!(main_#t~nondet0 % 256 != 0);havoc main_#t~nondet0;assume !(main_~len~5 % 4294967296 == 4);main_~a~5 := main_~a~5[main_~len~5 % 4294967296 := 0];main_#t~post1 := main_~len~5;main_~len~5 := main_#t~post1 + 1;havoc main_#t~post1; {317#(< (mod (+ ULTIMATE.start_main_~len~5 3) 4294967296) 5)} is VALID [2018-12-17 14:12:29,901 INFO L273 TraceCheckUtils]: 0: Hoare triple {273#true} havoc main_#res;havoc main_#t~post1, main_#t~nondet0, main_~a~5, main_~len~5, main_~i~5;havoc main_~a~5;main_~len~5 := 0;havoc main_~i~5; {321#(< (mod (+ ULTIMATE.start_main_~len~5 4) 4294967296) 5)} is VALID [2018-12-17 14:12:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-17 14:12:29,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-17 14:12:29,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-12-17 14:12:29,924 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-17 14:12:29,924 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-17 14:12:29,925 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-12-17 14:12:29,925 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2018-12-17 14:12:29,943 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 9 edges. 9 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:29,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-17 14:12:29,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-17 14:12:29,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-17 14:12:29,944 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-12-17 14:12:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:30,219 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-17 14:12:30,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-17 14:12:30,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-17 14:12:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-17 14:12:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-17 14:12:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2018-12-17 14:12:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-17 14:12:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2018-12-17 14:12:30,222 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 10 transitions. [2018-12-17 14:12:30,237 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-12-17 14:12:30,237 INFO L225 Difference]: With dead ends: 9 [2018-12-17 14:12:30,237 INFO L226 Difference]: Without dead ends: 0 [2018-12-17 14:12:30,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-17 14:12:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-17 14:12:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-17 14:12:30,238 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-12-17 14:12:30,238 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:30,239 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:30,239 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:30,239 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-17 14:12:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-17 14:12:30,239 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:30,239 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:30,239 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:30,239 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2018-12-17 14:12:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-17 14:12:30,240 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-17 14:12:30,240 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-17 14:12:30,240 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:30,240 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-12-17 14:12:30,240 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-12-17 14:12:30,240 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-12-17 14:12:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-17 14:12:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-17 14:12:30,241 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2018-12-17 14:12:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-17 14:12:30,241 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-17 14:12:30,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-17 14:12:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-17 14:12:30,241 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-17 14:12:30,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-17 14:12:30,351 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-12-17 14:12:30,351 INFO L444 ceAbstractionStarter]: At program point L31(lines 31 41) the Hoare annotation is: false [2018-12-17 14:12:30,351 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 43) no Hoare annotation was computed. [2018-12-17 14:12:30,351 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-12-17 14:12:30,351 INFO L444 ceAbstractionStarter]: At program point L40(lines 17 40) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5)) (and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1)) (and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5)) (and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5)) (and (<= 4 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 4))) [2018-12-17 14:12:30,351 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 42) no Hoare annotation was computed. [2018-12-17 14:12:30,353 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2018-12-17 14:12:30,355 WARN L170 areAnnotationChecker]: ULTIMATE.startErr0ASSERT_VIOLATIONASSERT has no Hoare annotation [2018-12-17 14:12:30,355 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2018-12-17 14:12:30,355 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2018-12-17 14:12:30,355 INFO L163 areAnnotationChecker]: CFG has 2 edges. 2 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2018-12-17 14:12:30,364 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 02:12:30 BoogieIcfgContainer [2018-12-17 14:12:30,364 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-17 14:12:30,366 INFO L168 Benchmark]: Toolchain (without parser) took 6794.46 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 696.8 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -657.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. [2018-12-17 14:12:30,368 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 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. [2018-12-17 14:12:30,369 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.07 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. [2018-12-17 14:12:30,369 INFO L168 Benchmark]: Boogie Preprocessor took 28.43 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. [2018-12-17 14:12:30,370 INFO L168 Benchmark]: RCFGBuilder took 426.03 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. [2018-12-17 14:12:30,370 INFO L168 Benchmark]: TraceAbstraction took 6291.44 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 696.8 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -678.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2018-12-17 14:12:30,374 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - GenericResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.25 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 43.07 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 28.43 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 426.03 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 6291.44 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 696.8 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -678.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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: 31]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((main_~len~5 <= 0 && 0 <= main_~len~5) || (1 <= main_~len~5 && main_~len~5 <= 1)) || (main_~len~5 <= 2 && 2 <= main_~len~5)) || (main_~len~5 <= 3 && 3 <= main_~len~5)) || (4 <= main_~len~5 && main_~len~5 <= 4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 6.2s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 11 SDs, 0 SdLazy, 76 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=4, 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: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 37 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 1534 SizeOfPredicates, 12 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/60 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...