java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenInequality.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:13:04,613 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:13:04,615 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:13:04,628 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:13:04,628 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:13:04,629 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:13:04,630 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:13:04,634 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:13:04,635 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:13:04,636 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:13:04,639 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:13:04,691 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 10:13:04,721 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:13:04,721 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:13:04,722 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:13:04,722 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:13:04,723 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:13:04,723 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:13:04,723 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:13:04,723 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:13:04,723 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:13:04,724 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:13:04,724 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:13:04,724 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:13:04,724 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:13:04,724 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:13:04,724 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:13:04,725 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:13:04,725 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:13:04,725 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:13:04,725 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:13:04,725 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:13:04,726 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:13:04,726 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:13:04,726 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:13:04,726 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:13:04,726 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:13:04,727 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:13:04,727 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:13:04,727 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:13:04,727 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:13:04,727 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:13:04,775 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:13:04,788 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:13:04,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:13:04,798 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:13:04,799 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:13:04,800 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenInequality.bpl [2018-09-28 10:13:04,801 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenInequality.bpl' [2018-09-28 10:13:04,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:13:04,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:13:04,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:13:04,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:13:04,860 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:13:04,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:13:04,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:13:04,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:13:04,906 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:13:04,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/1) ... [2018-09-28 10:13:04,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:13:04,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:13:04,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:13:04,933 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:13:04,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (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 [2018-09-28 10:13:05,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:13:05,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:13:05,198 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:13:05,199 INFO L202 PluginConnector]: Adding new model HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:13:05 BoogieIcfgContainer [2018-09-28 10:13:05,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:13:05,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:13:05,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:13:05,203 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:13:05,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:04" (1/2) ... [2018-09-28 10:13:05,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b11d0a and model type HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:13:05, skipping insertion in model container [2018-09-28 10:13:05,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:13:05" (2/2) ... [2018-09-28 10:13:05,207 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenInequality.bpl [2018-09-28 10:13:05,218 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:13:05,226 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:13:05,284 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:13:05,285 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:13:05,285 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:13:05,286 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:13:05,286 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:13:05,286 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:13:05,286 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:13:05,287 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:13:05,287 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:13:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:13:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:13:05,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:05,312 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:13:05,313 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:05,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2018-09-28 10:13:05,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:05,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:05,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:05,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:05,495 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:13:05,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:13:05,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:13:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:13:05,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:13:05,514 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:13:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:05,551 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:13:05,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:13:05,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:13:05,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:05,571 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:13:05,571 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:13:05,580 INFO L605 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 [2018-09-28 10:13:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:13:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:13:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:13:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:13:05,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:13:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:05,618 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:13:05,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:13:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:13:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:13:05,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:05,619 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:13:05,620 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:05,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:05,620 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2018-09-28 10:13:05,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:05,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:05,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:05,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:05,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:05,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:05,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:05,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:05,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:05,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:13:05,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:13:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:13:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:13:05,861 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-28 10:13:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:05,964 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:13:05,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:13:05,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-28 10:13:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:05,966 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:13:05,966 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:13:05,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:13:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:13:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:13:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:13:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:13:05,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:13:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:05,971 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:13:05,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:13:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:13:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:13:05,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:05,972 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:13:05,972 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:05,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 28752352, now seen corresponding path program 2 times [2018-09-28 10:13:05,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:05,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:05,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:05,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:06,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:06,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2018-09-28 10:13:06,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:06,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:06,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:06,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:06,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:06,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:13:06,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:13:06,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:13:06,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:13:06,162 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-28 10:13:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:06,196 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:13:06,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:13:06,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-28 10:13:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:06,197 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:13:06,197 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:13:06,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:13:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:13:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:13:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:13:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:13:06,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:13:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:06,200 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:13:06,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:13:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:13:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:13:06,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:06,201 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-28 10:13:06,201 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:06,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:06,202 INFO L82 PathProgramCache]: Analyzing trace with hash 891320966, now seen corresponding path program 3 times [2018-09-28 10:13:06,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:06,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:06,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:06,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:06,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:06,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:06,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2018-09-28 10:13:06,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:06,310 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:13:06,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:06,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:06,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:06,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:13:06,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:13:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:13:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:13:06,342 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-28 10:13:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:06,417 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:13:06,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:13:06,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-28 10:13:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:06,418 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:13:06,418 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:13:06,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:13:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:13:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:13:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:13:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:13:06,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:13:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:06,422 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:13:06,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:13:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:13:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:13:06,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:06,423 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-28 10:13:06,423 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:06,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:06,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144224, now seen corresponding path program 4 times [2018-09-28 10:13:06,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:06,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:06,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:06,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:06,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:06,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:06,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2018-09-28 10:13:06,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:06,734 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:06,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:06,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:06,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:06,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:13:06,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:13:06,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:13:06,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:13:06,777 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-28 10:13:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:06,809 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:13:06,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:13:06,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-28 10:13:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:06,811 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:13:06,811 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:13:06,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:13:06,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:13:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:13:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:13:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:13:06,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:13:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:06,815 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:13:06,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:13:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:13:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:13:06,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:06,816 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-28 10:13:06,817 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:06,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894150, now seen corresponding path program 5 times [2018-09-28 10:13:06,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:06,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:06,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:06,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:06,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:06,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:06,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:06,982 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:07,003 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:13:07,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:07,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:07,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:13:07,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:13:07,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:13:07,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:13:07,045 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-28 10:13:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:07,076 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:13:07,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:13:07,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 10:13:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:07,077 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:13:07,077 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:13:07,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:13:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:13:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:13:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:13:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:13:07,082 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:13:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:07,082 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:13:07,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:13:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:13:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:13:07,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:07,083 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-28 10:13:07,087 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:07,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:07,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141856, now seen corresponding path program 6 times [2018-09-28 10:13:07,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:07,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:07,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:07,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:07,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:07,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:07,298 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:07,329 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:13:07,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:07,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:07,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:13:07,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:13:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:13:07,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:13:07,370 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-28 10:13:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:07,413 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:13:07,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:13:07,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-28 10:13:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:07,415 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:13:07,415 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:13:07,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:13:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:13:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:13:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:13:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:13:07,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:13:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:07,418 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:13:07,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:13:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:13:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:13:07,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:07,419 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-28 10:13:07,420 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:07,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:07,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820742, now seen corresponding path program 7 times [2018-09-28 10:13:07,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:07,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:07,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:07,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:07,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:07,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:07,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:07,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:07,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:13:07,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:13:07,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:13:07,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:13:07,614 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-28 10:13:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:07,857 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:13:07,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:13:07,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-28 10:13:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:07,859 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:13:07,859 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:13:07,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:13:07,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:13:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:13:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:13:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:13:07,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:13:07,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:07,870 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:13:07,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:13:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:13:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:13:07,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:07,872 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-28 10:13:07,872 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:07,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166496, now seen corresponding path program 8 times [2018-09-28 10:13:07,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:07,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:07,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:07,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:07,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:08,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:08,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:08,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:08,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:08,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:08,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:13:08,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:13:08,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:13:08,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:13:08,115 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-28 10:13:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:08,163 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:13:08,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:13:08,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-28 10:13:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:08,164 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:13:08,165 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:13:08,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:13:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:13:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:13:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:13:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:13:08,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:13:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:08,169 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:13:08,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:13:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:13:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:13:08,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:08,169 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-28 10:13:08,170 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:08,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash -562523066, now seen corresponding path program 9 times [2018-09-28 10:13:08,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:08,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:08,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:08,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:08,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,339 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:13:08,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-09-28 10:13:08,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:13:08,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:13:08,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:13:08,341 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-28 10:13:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:08,371 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:13:08,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:13:08,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 10:13:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:08,372 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:13:08,372 INFO L226 Difference]: Without dead ends: 0 [2018-09-28 10:13:08,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:13:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-28 10:13:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-28 10:13:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-28 10:13:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-28 10:13:08,374 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-09-28 10:13:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:08,374 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-28 10:13:08,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:13:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-28 10:13:08,374 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-28 10:13:08,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-28 10:13:08,516 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-09-28 10:13:08,519 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 22 30) no Hoare annotation was computed. [2018-09-28 10:13:08,520 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 22 30) no Hoare annotation was computed. [2018-09-28 10:13:08,520 INFO L426 ceAbstractionStarter]: For program point L29(line 29) no Hoare annotation was computed. [2018-09-28 10:13:08,520 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 22 30) no Hoare annotation was computed. [2018-09-28 10:13:08,520 INFO L422 ceAbstractionStarter]: At program point L25-1(lines 25 28) the Hoare annotation is: (or (<= 9 s) (and (<= i 0) (<= 0 s)) (and (<= 4 s) (<= i 4)) (and (<= i 1) (<= 1 s)) (and (<= 8 s) (<= i 8)) (and (<= i 7) (<= 7 s)) (and (<= i 3) (<= 3 s)) (and (<= 5 s) (<= i 5)) (and (<= i 6) (<= 6 s)) (and (<= i 2) (<= 2 s))) [2018-09-28 10:13:08,520 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 29) no Hoare annotation was computed. [2018-09-28 10:13:08,532 INFO L202 PluginConnector]: Adding new model HiddenInequality.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:13:08 BoogieIcfgContainer [2018-09-28 10:13:08,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:13:08,533 INFO L168 Benchmark]: Toolchain (without parser) took 3677.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 245.9 MB). Peak memory consumption was 245.9 MB. Max. memory is 7.1 GB. [2018-09-28 10:13:08,535 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:13:08,535 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.91 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. [2018-09-28 10:13:08,536 INFO L168 Benchmark]: Boogie Preprocessor took 25.59 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. [2018-09-28 10:13:08,536 INFO L168 Benchmark]: RCFGBuilder took 266.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:13:08,542 INFO L168 Benchmark]: TraceAbstraction took 3332.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 224.7 MB). Peak memory consumption was 224.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:13:08,547 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 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.91 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 25.59 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 266.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3332.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 224.7 MB). Peak memory consumption was 224.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: 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: 25]: Loop Invariant Derived loop invariant: ((((((((9 <= s || (i <= 0 && 0 <= s)) || (4 <= s && i <= 4)) || (i <= 1 && 1 <= s)) || (8 <= s && i <= 8)) || (i <= 7 && 7 <= s)) || (i <= 3 && 3 <= s)) || (5 <= s && i <= 5)) || (i <= 6 && 6 <= s)) || (i <= 2 && 2 <= s) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 3.2s OverallTime, 10 OverallIterations, 9 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 31 SDtfs, 3 SDslu, 44 SDs, 0 SdLazy, 120 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 10 NumberOfFragments, 67 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 2443 SizeOfPredicates, 7 NumberOfNonLiveVariables, 244 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 45/285 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenInequality.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-13-08-570.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenInequality.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-13-08-570.csv Received shutdown request...