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-fa1c628-m [2019-01-31 14:31:06,508 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-31 14:31:06,510 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-31 14:31:06,522 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-31 14:31:06,558 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 [2019-01-31 14:31:06,577 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-31 14:31:06,577 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-31 14:31:06,578 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-31 14:31:06,578 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-31 14:31:06,579 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-31 14:31:06,579 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-31 14:31:06,579 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-31 14:31:06,579 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-31 14:31:06,579 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-31 14:31:06,580 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-31 14:31:06,580 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-31 14:31:06,580 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-31 14:31:06,580 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-31 14:31:06,580 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-31 14:31:06,581 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-31 14:31:06,581 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-31 14:31:06,581 INFO L133 SettingsManager]: * Use SBE=true [2019-01-31 14:31:06,582 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-31 14:31:06,582 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-31 14:31:06,582 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-31 14:31:06,582 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-31 14:31:06,583 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-31 14:31:06,583 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-31 14:31:06,583 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-31 14:31:06,583 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-31 14:31:06,583 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-31 14:31:06,584 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-31 14:31:06,584 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-31 14:31:06,584 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-31 14:31:06,584 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-31 14:31:06,584 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-31 14:31:06,585 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 14:31:06,585 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-31 14:31:06,585 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-31 14:31:06,585 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-31 14:31:06,585 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-31 14:31:06,586 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-31 14:31:06,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-01-31 14:31:06,586 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-31 14:31:06,586 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-31 14:31:06,617 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-31 14:31:06,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-31 14:31:06,642 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-31 14:31:06,644 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-31 14:31:06,644 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-31 14:31:06,645 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl [2019-01-31 14:31:06,645 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl' [2019-01-31 14:31:06,693 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-31 14:31:06,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-31 14:31:06,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-31 14:31:06,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-31 14:31:06,696 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-31 14:31:06,715 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,726 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-31 14:31:06,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-31 14:31:06,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-31 14:31:06,738 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-31 14:31:06,750 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,750 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,751 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,751 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,754 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,757 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,758 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 31.01 02:31:06" (1/1) ... [2019-01-31 14:31:06,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-31 14:31:06,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-31 14:31:06,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-31 14:31:06,761 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-31 14:31:06,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 02:31:06" (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:8092 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 14:31:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-31 14:31:06,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-31 14:31:07,031 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-31 14:31:07,032 INFO L286 CfgBuilder]: Removed 1 assue(true) statements. [2019-01-31 14:31:07,033 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:31:07 BoogieIcfgContainer [2019-01-31 14:31:07,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-31 14:31:07,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-31 14:31:07,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-31 14:31:07,038 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-31 14:31:07,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 02:31:06" (1/2) ... [2019-01-31 14:31:07,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee37fe9 and model type n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:31:07, skipping insertion in model container [2019-01-31 14:31:07,039 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 31.01 02:31:07" (2/2) ... [2019-01-31 14:31:07,041 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11.i_3.bpl [2019-01-31 14:31:07,051 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-31 14:31:07,058 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-31 14:31:07,075 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-31 14:31:07,107 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-31 14:31:07,107 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-31 14:31:07,107 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-31 14:31:07,107 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-31 14:31:07,108 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-31 14:31:07,108 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-31 14:31:07,108 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-31 14:31:07,108 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-31 14:31:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-01-31 14:31:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 14:31:07,129 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 14:31:07,130 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 14:31:07,132 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 14:31:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 14:31:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2019-01-31 14:31:07,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 14:31:07,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:07,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 14:31:07,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:07,196 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 14:31:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:07,588 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-01-31 14:31:07,606 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 [2019-01-31 14:31:07,611 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 [2019-01-31 14:31:07,612 INFO L273 TraceCheckUtils]: 2: Hoare triple {10#false} assume !false; {10#false} is VALID [2019-01-31 14:31:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:07,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-31 14:31:07,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-31 14:31:07,617 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 14:31:07,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-31 14:31:07,624 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-31 14:31:07,627 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2019-01-31 14:31:07,640 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 3 edges. 3 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:07,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-31 14:31:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-31 14:31:07,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 14:31:07,651 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-01-31 14:31:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:07,742 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-01-31 14:31:07,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-31 14:31:07,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-31 14:31:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 14:31:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-01-31 14:31:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2019-01-31 14:31:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-01-31 14:31:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2019-01-31 14:31:07,754 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 10 transitions. [2019-01-31 14:31:07,816 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:07,826 INFO L225 Difference]: With dead ends: 9 [2019-01-31 14:31:07,826 INFO L226 Difference]: Without dead ends: 5 [2019-01-31 14:31:07,830 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 [2019-01-31 14:31:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-01-31 14:31:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-01-31 14:31:07,917 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-31 14:31:07,917 INFO L82 GeneralOperation]: Start isEquivalent. First operand 5 states. Second operand 5 states. [2019-01-31 14:31:07,918 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2019-01-31 14:31:07,918 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2019-01-31 14:31:07,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:07,920 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-01-31 14:31:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-01-31 14:31:07,920 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:07,921 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:07,921 INFO L74 IsIncluded]: Start isIncluded. First operand 5 states. Second operand 5 states. [2019-01-31 14:31:07,921 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 5 states. [2019-01-31 14:31:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:07,922 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-01-31 14:31:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-01-31 14:31:07,923 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:07,923 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:07,924 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-31 14:31:07,924 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-31 14:31:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-01-31 14:31:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-01-31 14:31:07,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-01-31 14:31:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 14:31:07,927 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-01-31 14:31:07,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-31 14:31:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-01-31 14:31:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 14:31:07,928 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 14:31:07,929 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 14:31:07,929 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 14:31:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 14:31:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2019-01-31 14:31:07,931 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 14:31:07,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:07,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 14:31:07,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:07,932 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 14:31:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:08,270 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 [2019-01-31 14:31:08,286 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 [2019-01-31 14:31:08,303 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 [2019-01-31 14:31:08,304 INFO L273 TraceCheckUtils]: 3: Hoare triple {46#false} assume !false; {46#false} is VALID [2019-01-31 14:31:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:08,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 14:31:08,305 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 14:31:08,306 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 14:31:08,310 INFO L207 CegarAbsIntRunner]: [0], [5], [7], [9] [2019-01-31 14:31:08,353 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 14:31:08,354 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 14:31:08,611 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 14:31:08,612 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. [2019-01-31 14:31:08,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 14:31:08,619 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 14:31:08,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 14:31:08,619 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 [2019-01-31 14:31:08,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 14:31:08,631 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 14:31:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:08,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 14:31:08,766 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 [2019-01-31 14:31:08,768 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 [2019-01-31 14:31:08,769 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 [2019-01-31 14:31:08,769 INFO L273 TraceCheckUtils]: 3: Hoare triple {46#false} assume !false; {46#false} is VALID [2019-01-31 14:31:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:08,770 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 14:31:09,065 INFO L273 TraceCheckUtils]: 3: Hoare triple {46#false} assume !false; {46#false} is VALID [2019-01-31 14:31:09,078 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 [2019-01-31 14:31:09,092 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 [2019-01-31 14:31:09,106 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 [2019-01-31 14:31:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:09,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 14:31:09,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-01-31 14:31:09,129 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 14:31:09,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-01-31 14:31:09,130 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-31 14:31:09,130 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2019-01-31 14:31:09,141 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 6 edges. 6 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:09,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-31 14:31:09,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-31 14:31:09,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 14:31:09,143 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2019-01-31 14:31:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:09,252 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-01-31 14:31:09,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-31 14:31:09,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-01-31 14:31:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 14:31:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-01-31 14:31:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-01-31 14:31:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-01-31 14:31:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-01-31 14:31:09,255 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 8 transitions. [2019-01-31 14:31:09,276 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:09,277 INFO L225 Difference]: With dead ends: 8 [2019-01-31 14:31:09,277 INFO L226 Difference]: Without dead ends: 6 [2019-01-31 14:31:09,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 14:31:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-01-31 14:31:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-01-31 14:31:09,299 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-31 14:31:09,299 INFO L82 GeneralOperation]: Start isEquivalent. First operand 6 states. Second operand 6 states. [2019-01-31 14:31:09,299 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states. [2019-01-31 14:31:09,300 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states. [2019-01-31 14:31:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:09,301 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-01-31 14:31:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-01-31 14:31:09,302 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:09,302 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:09,302 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states. [2019-01-31 14:31:09,303 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states. [2019-01-31 14:31:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:09,304 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-01-31 14:31:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-01-31 14:31:09,304 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:09,304 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:09,305 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-31 14:31:09,305 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-31 14:31:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-31 14:31:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-01-31 14:31:09,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-01-31 14:31:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 14:31:09,306 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-01-31 14:31:09,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-31 14:31:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-01-31 14:31:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 14:31:09,307 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 14:31:09,307 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-31 14:31:09,307 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 14:31:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 14:31:09,308 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2019-01-31 14:31:09,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 14:31:09,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:09,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 14:31:09,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:09,309 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 14:31:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:09,542 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 [2019-01-31 14:31:09,544 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 [2019-01-31 14:31:09,548 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 [2019-01-31 14:31:09,549 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 [2019-01-31 14:31:09,550 INFO L273 TraceCheckUtils]: 4: Hoare triple {108#false} assume !false; {108#false} is VALID [2019-01-31 14:31:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:09,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 14:31:09,550 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 14:31:09,551 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-31 14:31:09,551 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-31 14:31:09,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 14:31:09,551 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 [2019-01-31 14:31:09,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-31 14:31:09,562 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-31 14:31:09,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-01-31 14:31:09,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-31 14:31:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:09,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 14:31:09,963 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 [2019-01-31 14:31:09,965 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 [2019-01-31 14:31:09,966 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 [2019-01-31 14:31:09,984 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 [2019-01-31 14:31:09,984 INFO L273 TraceCheckUtils]: 4: Hoare triple {108#false} assume !false; {108#false} is VALID [2019-01-31 14:31:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:09,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 14:31:10,095 INFO L273 TraceCheckUtils]: 4: Hoare triple {108#false} assume !false; {108#false} is VALID [2019-01-31 14:31:10,097 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 [2019-01-31 14:31:10,103 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 [2019-01-31 14:31:10,111 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 [2019-01-31 14:31:10,112 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 [2019-01-31 14:31:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:10,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 14:31:10,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2019-01-31 14:31:10,132 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 14:31:10,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-01-31 14:31:10,132 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-31 14:31:10,133 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2019-01-31 14:31:10,142 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 7 edges. 7 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:10,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 14:31:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 14:31:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-01-31 14:31:10,143 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2019-01-31 14:31:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:10,259 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-01-31 14:31:10,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 14:31:10,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-01-31 14:31:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 14:31:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-31 14:31:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 9 transitions. [2019-01-31 14:31:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-31 14:31:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 9 transitions. [2019-01-31 14:31:10,264 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 9 transitions. [2019-01-31 14:31:10,293 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 9 edges. 9 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:10,294 INFO L225 Difference]: With dead ends: 9 [2019-01-31 14:31:10,294 INFO L226 Difference]: Without dead ends: 7 [2019-01-31 14:31:10,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-01-31 14:31:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-01-31 14:31:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-01-31 14:31:10,306 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-31 14:31:10,306 INFO L82 GeneralOperation]: Start isEquivalent. First operand 7 states. Second operand 7 states. [2019-01-31 14:31:10,307 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 7 states. [2019-01-31 14:31:10,307 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 7 states. [2019-01-31 14:31:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:10,308 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-01-31 14:31:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-01-31 14:31:10,309 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:10,310 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:10,310 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 7 states. [2019-01-31 14:31:10,310 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 7 states. [2019-01-31 14:31:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:10,311 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-01-31 14:31:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-01-31 14:31:10,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:10,312 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:10,312 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-31 14:31:10,312 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-31 14:31:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-31 14:31:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-01-31 14:31:10,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-01-31 14:31:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 14:31:10,314 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-01-31 14:31:10,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 14:31:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-01-31 14:31:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-31 14:31:10,315 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 14:31:10,315 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-01-31 14:31:10,315 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 14:31:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 14:31:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2019-01-31 14:31:10,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 14:31:10,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:10,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-31 14:31:10,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:10,317 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 14:31:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:10,593 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 [2019-01-31 14:31:10,594 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 [2019-01-31 14:31:10,596 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 [2019-01-31 14:31:10,597 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 [2019-01-31 14:31:10,600 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 [2019-01-31 14:31:10,601 INFO L273 TraceCheckUtils]: 5: Hoare triple {184#false} assume !false; {184#false} is VALID [2019-01-31 14:31:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:10,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 14:31:10,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 14:31:10,602 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-31 14:31:10,602 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-31 14:31:10,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 14:31:10,603 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 [2019-01-31 14:31:10,611 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-31 14:31:10,612 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-31 14:31:10,627 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-31 14:31:10,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-31 14:31:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:10,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 14:31:10,728 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 [2019-01-31 14:31:10,729 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 [2019-01-31 14:31:10,730 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 [2019-01-31 14:31:10,731 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 [2019-01-31 14:31:10,732 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 [2019-01-31 14:31:10,733 INFO L273 TraceCheckUtils]: 5: Hoare triple {184#false} assume !false; {184#false} is VALID [2019-01-31 14:31:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:10,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 14:31:10,837 INFO L273 TraceCheckUtils]: 5: Hoare triple {184#false} assume !false; {184#false} is VALID [2019-01-31 14:31:10,855 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 [2019-01-31 14:31:10,859 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 [2019-01-31 14:31:10,861 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 [2019-01-31 14:31:10,862 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 [2019-01-31 14:31:10,862 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 [2019-01-31 14:31:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:10,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 14:31:10,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2019-01-31 14:31:10,883 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 14:31:10,883 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-01-31 14:31:10,884 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-31 14:31:10,884 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states. [2019-01-31 14:31:10,896 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:10,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-31 14:31:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-31 14:31:10,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-01-31 14:31:10,897 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2019-01-31 14:31:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:11,077 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-01-31 14:31:11,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 14:31:11,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-01-31 14:31:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 14:31:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-31 14:31:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2019-01-31 14:31:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-31 14:31:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2019-01-31 14:31:11,080 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 10 transitions. [2019-01-31 14:31:11,099 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:11,100 INFO L225 Difference]: With dead ends: 10 [2019-01-31 14:31:11,100 INFO L226 Difference]: Without dead ends: 8 [2019-01-31 14:31:11,100 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 [2019-01-31 14:31:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-31 14:31:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-01-31 14:31:11,122 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-31 14:31:11,122 INFO L82 GeneralOperation]: Start isEquivalent. First operand 8 states. Second operand 8 states. [2019-01-31 14:31:11,123 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2019-01-31 14:31:11,123 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2019-01-31 14:31:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:11,124 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-01-31 14:31:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-01-31 14:31:11,124 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:11,124 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:11,124 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2019-01-31 14:31:11,124 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2019-01-31 14:31:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:11,125 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-01-31 14:31:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-01-31 14:31:11,126 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:11,126 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:11,126 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-31 14:31:11,126 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-31 14:31:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-31 14:31:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-01-31 14:31:11,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-01-31 14:31:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 14:31:11,127 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-01-31 14:31:11,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-31 14:31:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-01-31 14:31:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-31 14:31:11,128 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 14:31:11,128 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2019-01-31 14:31:11,129 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 14:31:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 14:31:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2019-01-31 14:31:11,129 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 14:31:11,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:11,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-31 14:31:11,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 14:31:11,130 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 14:31:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:11,428 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 [2019-01-31 14:31:11,431 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 [2019-01-31 14:31:11,432 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 [2019-01-31 14:31:11,433 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 [2019-01-31 14:31:11,437 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 [2019-01-31 14:31:11,439 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 [2019-01-31 14:31:11,440 INFO L273 TraceCheckUtils]: 6: Hoare triple {274#false} assume !false; {274#false} is VALID [2019-01-31 14:31:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:11,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 14:31:11,441 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 14:31:11,441 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-31 14:31:11,442 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-31 14:31:11,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 14:31:11,442 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 [2019-01-31 14:31:11,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 14:31:11,456 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 14:31:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 14:31:11,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 14:31:11,657 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 [2019-01-31 14:31:11,658 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 [2019-01-31 14:31:11,660 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 [2019-01-31 14:31:11,661 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 [2019-01-31 14:31:11,663 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 [2019-01-31 14:31:11,664 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 [2019-01-31 14:31:11,665 INFO L273 TraceCheckUtils]: 6: Hoare triple {274#false} assume !false; {274#false} is VALID [2019-01-31 14:31:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:11,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 14:31:11,942 INFO L273 TraceCheckUtils]: 6: Hoare triple {274#false} assume !false; {274#false} is VALID [2019-01-31 14:31:11,945 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 [2019-01-31 14:31:11,947 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 [2019-01-31 14:31:11,948 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 [2019-01-31 14:31:11,950 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 [2019-01-31 14:31:11,952 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 [2019-01-31 14:31:11,953 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 [2019-01-31 14:31:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 14:31:11,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 14:31:11,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2019-01-31 14:31:11,974 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 14:31:11,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-31 14:31:11,975 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-31 14:31:11,975 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2019-01-31 14:31:11,987 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 9 edges. 9 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:11,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 14:31:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 14:31:11,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-01-31 14:31:11,989 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2019-01-31 14:31:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:12,128 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-01-31 14:31:12,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-31 14:31:12,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-31 14:31:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 14:31:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-31 14:31:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-01-31 14:31:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-31 14:31:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-01-31 14:31:12,131 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 10 transitions. [2019-01-31 14:31:12,146 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-31 14:31:12,147 INFO L225 Difference]: With dead ends: 9 [2019-01-31 14:31:12,147 INFO L226 Difference]: Without dead ends: 0 [2019-01-31 14:31:12,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-01-31 14:31:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-31 14:31:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-31 14:31:12,148 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-31 14:31:12,149 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2019-01-31 14:31:12,149 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2019-01-31 14:31:12,149 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2019-01-31 14:31:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:12,149 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-01-31 14:31:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-31 14:31:12,150 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:12,150 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:12,150 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2019-01-31 14:31:12,150 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2019-01-31 14:31:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 14:31:12,151 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-01-31 14:31:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-31 14:31:12,151 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:12,151 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-31 14:31:12,151 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-31 14:31:12,151 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-31 14:31:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-31 14:31:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-31 14:31:12,152 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2019-01-31 14:31:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 14:31:12,152 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-31 14:31:12,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 14:31:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-31 14:31:12,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-31 14:31:12,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-31 14:31:12,240 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2019-01-31 14:31:12,240 INFO L444 ceAbstractionStarter]: At program point L31(lines 31 41) the Hoare annotation is: false [2019-01-31 14:31:12,240 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 43) no Hoare annotation was computed. [2019-01-31 14:31:12,240 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2019-01-31 14:31:12,240 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))) [2019-01-31 14:31:12,240 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 42) no Hoare annotation was computed. [2019-01-31 14:31:12,242 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2019-01-31 14:31:12,244 WARN L170 areAnnotationChecker]: ULTIMATE.startErr0ASSERT_VIOLATIONASSERT has no Hoare annotation [2019-01-31 14:31:12,244 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2019-01-31 14:31:12,245 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2019-01-31 14:31:12,245 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. [2019-01-31 14:31:12,250 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:31:12 BoogieIcfgContainer [2019-01-31 14:31:12,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-31 14:31:12,252 INFO L168 Benchmark]: Toolchain (without parser) took 5558.21 ms. Allocated memory was 134.2 MB in the beginning and 254.8 MB in the end (delta: 120.6 MB). Free memory was 108.8 MB in the beginning and 231.6 MB in the end (delta: -122.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-31 14:31:12,253 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 134.2 MB. Free memory is still 109.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-31 14:31:12,254 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.86 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 106.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-01-31 14:31:12,255 INFO L168 Benchmark]: Boogie Preprocessor took 22.42 ms. Allocated memory is still 134.2 MB. Free memory was 106.7 MB in the beginning and 105.8 MB in the end (delta: 900.1 kB). Peak memory consumption was 900.1 kB. Max. memory is 7.1 GB. [2019-01-31 14:31:12,259 INFO L168 Benchmark]: RCFGBuilder took 272.86 ms. Allocated memory is still 134.2 MB. Free memory was 105.8 MB in the beginning and 95.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-01-31 14:31:12,260 INFO L168 Benchmark]: TraceAbstraction took 5216.16 ms. Allocated memory was 134.2 MB in the beginning and 254.8 MB in the end (delta: 120.6 MB). Free memory was 95.4 MB in the beginning and 231.6 MB in the end (delta: -136.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-31 14:31:12,266 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 0.19 ms. Allocated memory is still 134.2 MB. Free memory is still 109.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.86 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 106.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.42 ms. Allocated memory is still 134.2 MB. Free memory was 106.7 MB in the beginning and 105.8 MB in the end (delta: 900.1 kB). Peak memory consumption was 900.1 kB. Max. memory is 7.1 GB. * RCFGBuilder took 272.86 ms. Allocated memory is still 134.2 MB. Free memory was 105.8 MB in the beginning and 95.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5216.16 ms. Allocated memory was 134.2 MB in the beginning and 254.8 MB in the end (delta: 120.6 MB). Free memory was 95.4 MB in the beginning and 231.6 MB in the end (delta: -136.2 MB). There was no memory consumed. 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, 5.1s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 11 SDs, 0 SdLazy, 76 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s 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, 0.3s 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, 3.2s 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...