java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:08:28,521 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:08:28,523 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:08:28,535 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 15:08:28,535 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 15:08:28,536 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 15:08:28,537 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 15:08:28,539 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 15:08:28,541 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 15:08:28,542 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 15:08:28,543 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 15:08:28,568 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2018-12-03 15:08:28,585 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:08:28,586 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:08:28,587 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:08:28,589 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:08:28,589 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:08:28,589 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:08:28,590 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:08:28,590 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:08:28,590 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:08:28,590 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:08:28,590 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:08:28,591 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:08:28,591 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:08:28,591 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:08:28,591 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:08:28,592 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:08:28,592 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:08:28,592 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:08:28,592 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:08:28,594 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:08:28,594 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:08:28,594 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:08:28,594 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:08:28,594 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:08:28,595 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:08:28,595 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:08:28,595 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:08:28,595 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:08:28,595 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:08:28,596 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:08:28,596 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:08:28,596 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:08:28,597 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:08:28,597 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:08:28,597 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:08:28,597 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:08:28,597 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:08:28,598 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:08:28,598 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:08:28,598 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:08:28,598 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:08:28,652 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:08:28,670 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:08:28,675 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:08:28,677 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:08:28,677 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:08:28,678 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl [2018-12-03 15:08:28,678 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl' [2018-12-03 15:08:28,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:08:28,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:08:28,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:08:28,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:08:28,718 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:08:28,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:08:28,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:08:28,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:08:28,753 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:08:28,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... [2018-12-03 15:08:28,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:08:28,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:08:28,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:08:28,773 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:08:28,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:08:28,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-12-03 15:08:28,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 15:08:28,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 15:08:29,019 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 15:08:29,019 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 15:08:29,021 INFO L202 PluginConnector]: Adding new model cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:08:29 BoogieIcfgContainer [2018-12-03 15:08:29,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:08:29,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:08:29,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:08:29,026 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:08:29,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:08:28" (1/2) ... [2018-12-03 15:08:29,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36320e4f and model type cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:08:29, skipping insertion in model container [2018-12-03 15:08:29,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:08:29" (2/2) ... [2018-12-03 15:08:29,030 INFO L112 eAbstractionObserver]: Analyzing ICFG cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl [2018-12-03 15:08:29,040 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:08:29,048 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:08:29,068 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:08:29,099 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:08:29,100 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:08:29,100 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:08:29,100 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:08:29,100 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:08:29,101 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:08:29,101 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:08:29,101 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:08:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 15:08:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 15:08:29,123 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:29,124 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 15:08:29,126 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:29,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-12-03 15:08:29,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:29,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:29,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:29,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:29,184 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:29,269 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:08:29,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:08:29,270 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:08:29,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:08:29,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:08:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:08:29,293 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-03 15:08:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:29,344 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-03 15:08:29,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:08:29,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 15:08:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:29,357 INFO L225 Difference]: With dead ends: 9 [2018-12-03 15:08:29,357 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 15:08:29,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:08:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 15:08:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 15:08:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 15:08:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 15:08:29,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 15:08:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:29,399 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 15:08:29,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:08:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 15:08:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 15:08:29,399 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:29,399 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 15:08:29,400 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:29,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:29,400 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-12-03 15:08:29,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:29,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:29,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:29,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:29,402 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:29,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:29,514 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:29,515 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 15:08:29,517 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-03 15:08:29,581 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:08:29,582 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:08:29,746 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 15:08:29,747 INFO L272 AbstractInterpreter]: Visited 4 different actions 11 times. Merged at 3 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 15:08:29,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:29,759 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 15:08:29,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:29,759 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-12-03 15:08:29,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:29,780 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:08:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:29,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:30,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:30,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:30,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-03 15:08:30,239 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:30,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 15:08:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 15:08:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-12-03 15:08:30,241 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 6 states. [2018-12-03 15:08:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:30,271 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-03 15:08:30,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 15:08:30,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-03 15:08:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:30,273 INFO L225 Difference]: With dead ends: 8 [2018-12-03 15:08:30,273 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 15:08:30,275 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-12-03 15:08:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 15:08:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 15:08:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 15:08:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 15:08:30,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 15:08:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:30,278 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 15:08:30,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 15:08:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 15:08:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 15:08:30,279 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:30,279 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-03 15:08:30,279 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:30,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:30,280 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-12-03 15:08:30,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:30,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:30,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:30,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:30,282 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:30,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:30,388 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:30,389 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:30,389 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:30,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:30,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:08:30,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:08:30,406 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:08:30,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-03 15:08:30,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:30,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:30,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:30,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:30,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2018-12-03 15:08:30,852 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:30,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 15:08:30,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 15:08:30,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-12-03 15:08:30,854 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 8 states. [2018-12-03 15:08:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:30,890 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 15:08:30,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 15:08:30,891 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-03 15:08:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:30,891 INFO L225 Difference]: With dead ends: 9 [2018-12-03 15:08:30,892 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 15:08:30,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-12-03 15:08:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 15:08:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 15:08:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 15:08:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 15:08:30,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-03 15:08:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:30,896 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 15:08:30,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 15:08:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 15:08:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 15:08:30,897 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:30,897 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-12-03 15:08:30,897 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:30,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-12-03 15:08:30,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:30,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:30,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:30,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:30,900 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:30,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:30,977 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:30,977 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:30,977 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:30,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:30,978 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:08:30,989 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:08:30,990 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:08:31,002 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:08:31,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:08:31,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:31,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:31,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:31,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-03 15:08:31,253 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:31,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 15:08:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 15:08:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:08:31,254 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2018-12-03 15:08:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:31,284 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-03 15:08:31,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 15:08:31,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-03 15:08:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:31,287 INFO L225 Difference]: With dead ends: 10 [2018-12-03 15:08:31,287 INFO L226 Difference]: Without dead ends: 8 [2018-12-03 15:08:31,288 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:08:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-03 15:08:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-03 15:08:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-03 15:08:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-12-03 15:08:31,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-12-03 15:08:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:31,292 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-12-03 15:08:31,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 15:08:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-03 15:08:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-03 15:08:31,292 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:31,293 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-12-03 15:08:31,293 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:31,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:31,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-12-03 15:08:31,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:31,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:31,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:08:31,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:31,295 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:31,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:31,474 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:08:31,474 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:08:31,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:08:31,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:08:31,475 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:08:31,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:31,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:08:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:31,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:08:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:31,509 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:08:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:31,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:08:31,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2018-12-03 15:08:31,553 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:08:31,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 15:08:31,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 15:08:31,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-03 15:08:31,554 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-12-03 15:08:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:31,608 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-12-03 15:08:31,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 15:08:31,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-12-03 15:08:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:31,611 INFO L225 Difference]: With dead ends: 11 [2018-12-03 15:08:31,611 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 15:08:31,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-03 15:08:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 15:08:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 15:08:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 15:08:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-03 15:08:31,615 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-12-03 15:08:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:31,615 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-03 15:08:31,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 15:08:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-03 15:08:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 15:08:31,616 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:08:31,616 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-12-03 15:08:31,617 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:08:31,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:08:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-12-03 15:08:31,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:08:31,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:31,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:08:31,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:08:31,619 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:08:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:08:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:08:32,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:08:32,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-03 15:08:32,007 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:08:32,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 15:08:32,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 15:08:32,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-03 15:08:32,009 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2018-12-03 15:08:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:08:32,090 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 15:08:32,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 15:08:32,091 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-12-03 15:08:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:08:32,091 INFO L225 Difference]: With dead ends: 9 [2018-12-03 15:08:32,092 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 15:08:32,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-03 15:08:32,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 15:08:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 15:08:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 15:08:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 15:08:32,093 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2018-12-03 15:08:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:08:32,094 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 15:08:32,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 15:08:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 15:08:32,094 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 15:08:32,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 15:08:32,329 WARN L180 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-12-03 15:08:32,337 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 37) no Hoare annotation was computed. [2018-12-03 15:08:32,337 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 37) no Hoare annotation was computed. [2018-12-03 15:08:32,337 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 37) no Hoare annotation was computed. [2018-12-03 15:08:32,338 INFO L444 ceAbstractionStarter]: At program point L26(lines 17 27) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~j~4 (+ ULTIMATE.start_main_~i~4 3)) (<= ULTIMATE.start_main_~i~4 5) (<= 8 ULTIMATE.start_main_~j~4)) (and (<= 10 ULTIMATE.start_main_~j~4) (<= ULTIMATE.start_main_~j~4 (+ ULTIMATE.start_main_~i~4 9)) (<= ULTIMATE.start_main_~i~4 1)) (and (<= ULTIMATE.start_main_~j~4 6) (<= 6 ULTIMATE.start_main_~j~4) (<= (+ ULTIMATE.start_main_~j~4 3) ULTIMATE.start_main_~i~4)) (and (<= ULTIMATE.start_main_~i~4 3) (<= ULTIMATE.start_main_~j~4 (+ ULTIMATE.start_main_~i~4 6)) (<= 9 ULTIMATE.start_main_~j~4)) (and (<= 7 ULTIMATE.start_main_~j~4) (<= ULTIMATE.start_main_~i~4 7) (<= ULTIMATE.start_main_~j~4 ULTIMATE.start_main_~i~4))) [2018-12-03 15:08:32,338 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 36) no Hoare annotation was computed. [2018-12-03 15:08:32,338 INFO L444 ceAbstractionStarter]: At program point L34(lines 34 35) the Hoare annotation is: false [2018-12-03 15:08:32,348 INFO L202 PluginConnector]: Adding new model cggmp2005.c.i_3.bplTransformedIcfg_BEv2_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:08:32 BoogieIcfgContainer [2018-12-03 15:08:32,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 15:08:32,349 INFO L168 Benchmark]: Toolchain (without parser) took 3634.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 171.8 MB). Peak memory consumption was 171.8 MB. Max. memory is 7.1 GB. [2018-12-03 15:08:32,351 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:08:32,351 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:08:32,352 INFO L168 Benchmark]: Boogie Preprocessor took 19.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:08:32,352 INFO L168 Benchmark]: RCFGBuilder took 249.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 15:08:32,353 INFO L168 Benchmark]: TraceAbstraction took 3326.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 150.7 MB). Peak memory consumption was 150.7 MB. Max. memory is 7.1 GB. [2018-12-03 15:08:32,357 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 249.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3326.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 150.7 MB). Peak memory consumption was 150.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((main_~j~4 <= main_~i~4 + 3 && main_~i~4 <= 5) && 8 <= main_~j~4) || ((10 <= main_~j~4 && main_~j~4 <= main_~i~4 + 9) && main_~i~4 <= 1)) || ((main_~j~4 <= 6 && 6 <= main_~j~4) && main_~j~4 + 3 <= main_~i~4)) || ((main_~i~4 <= 3 && main_~j~4 <= main_~i~4 + 6) && 9 <= main_~j~4)) || ((7 <= main_~j~4 && main_~i~4 <= 7) && main_~j~4 <= main_~i~4) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: false - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 3.2s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 16 SDtfs, 0 SDslu, 16 SDs, 0 SdLazy, 69 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 60 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 1483 SizeOfPredicates, 7 NumberOfNonLiveVariables, 110 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 15/75 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...