java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:25:14,891 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:25:14,894 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:25:14,907 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:25:14,907 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:25:14,908 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:25:14,910 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:25:14,912 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:25:14,914 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:25:14,914 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:25:14,915 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:25:14,916 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:25:14,917 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:25:14,918 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:25:14,919 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:25:14,920 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:25:14,921 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:25:14,923 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:25:14,925 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:25:14,926 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:25:14,928 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:25:14,929 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:25:14,932 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 12:25:14,942 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 12:25:14,958 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:25:14,958 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:25:14,959 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:25:14,960 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:25:14,960 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:25:14,960 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:25:14,960 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:25:14,961 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:25:14,961 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:25:14,961 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:25:14,961 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:25:14,962 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:25:14,962 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:25:14,962 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:25:14,963 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:25:14,963 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:25:14,963 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:25:14,964 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:25:14,964 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:25:14,964 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:25:14,964 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:25:14,964 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:25:14,965 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:25:14,965 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:25:14,965 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:25:14,965 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:25:14,966 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:25:14,966 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:25:14,966 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:25:14,966 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:25:14,966 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:25:14,967 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:25:14,967 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:25:14,967 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:25:14,967 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:25:14,968 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:25:15,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:25:15,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:25:15,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:25:15,047 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:25:15,047 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:25:15,048 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-10-24 12:25:15,108 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bef46d093/d2236c38dc8b4ab58e2f5083028e36cf/FLAGa2344ae62 [2018-10-24 12:25:15,585 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:25:15,587 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-10-24 12:25:15,594 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bef46d093/d2236c38dc8b4ab58e2f5083028e36cf/FLAGa2344ae62 [2018-10-24 12:25:15,610 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bef46d093/d2236c38dc8b4ab58e2f5083028e36cf [2018-10-24 12:25:15,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:25:15,624 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:25:15,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:25:15,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:25:15,630 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:25:15,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1652d08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15, skipping insertion in model container [2018-10-24 12:25:15,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:25:15,668 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:25:15,902 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:25:15,905 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:25:15,922 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:25:15,935 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:25:15,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15 WrapperNode [2018-10-24 12:25:15,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:25:15,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:25:15,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:25:15,937 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:25:15,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:25:15,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:25:15,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:25:15,961 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:25:15,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... [2018-10-24 12:25:15,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:25:15,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:25:15,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:25:15,985 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:25:15,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:16,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:25:16,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:25:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:25:16,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:25:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:25:16,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:25:16,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:25:16,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:25:16,301 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:25:16,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:25:16 BoogieIcfgContainer [2018-10-24 12:25:16,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:25:16,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:25:16,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:25:16,307 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:25:16,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:25:15" (1/3) ... [2018-10-24 12:25:16,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df93c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:25:16, skipping insertion in model container [2018-10-24 12:25:16,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:25:15" (2/3) ... [2018-10-24 12:25:16,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df93c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:25:16, skipping insertion in model container [2018-10-24 12:25:16,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:25:16" (3/3) ... [2018-10-24 12:25:16,311 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_true-unreach-call_true-termination.i [2018-10-24 12:25:16,321 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:25:16,329 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:25:16,346 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:25:16,380 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:25:16,380 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:25:16,381 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:25:16,381 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:25:16,381 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:25:16,381 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:25:16,381 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:25:16,381 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:25:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-24 12:25:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 12:25:16,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:16,409 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:16,411 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:16,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1870586046, now seen corresponding path program 1 times [2018-10-24 12:25:16,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:16,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:16,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:16,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:16,470 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:16,526 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:25:16,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:25:16,526 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:25:16,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:25:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:25:16,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:25:16,551 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-24 12:25:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:16,575 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-24 12:25:16,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:25:16,577 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-24 12:25:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:16,587 INFO L225 Difference]: With dead ends: 30 [2018-10-24 12:25:16,587 INFO L226 Difference]: Without dead ends: 13 [2018-10-24 12:25:16,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:25:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-24 12:25:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-24 12:25:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-24 12:25:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-24 12:25:16,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-24 12:25:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:16,628 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-24 12:25:16,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:25:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-24 12:25:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 12:25:16,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:16,629 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:16,630 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:16,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:16,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1861068280, now seen corresponding path program 1 times [2018-10-24 12:25:16,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:16,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:16,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:16,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:16,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:16,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:25:16,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 12:25:16,698 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:25:16,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 12:25:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 12:25:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:25:16,702 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-10-24 12:25:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:16,782 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-24 12:25:16,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:25:16,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-24 12:25:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:16,784 INFO L225 Difference]: With dead ends: 21 [2018-10-24 12:25:16,785 INFO L226 Difference]: Without dead ends: 16 [2018-10-24 12:25:16,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:25:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-24 12:25:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-10-24 12:25:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-24 12:25:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-24 12:25:16,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-10-24 12:25:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:16,791 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-24 12:25:16,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 12:25:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-24 12:25:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-24 12:25:16,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:16,793 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:16,793 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:16,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash 996352094, now seen corresponding path program 1 times [2018-10-24 12:25:16,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:16,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:16,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:16,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:16,796 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:16,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:16,925 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:16,926 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-10-24 12:25:16,928 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [15], [21], [24], [26], [32], [33], [34], [36] [2018-10-24 12:25:16,968 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:25:16,969 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:25:17,200 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:25:17,201 INFO L272 AbstractInterpreter]: Visited 13 different actions 30 times. Merged at 3 different actions 13 times. Widened at 1 different actions 1 times. Found 3 fixpoints after 2 different actions. Largest state had 3 variables. [2018-10-24 12:25:17,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:17,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:25:17,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:17,249 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:17,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:17,267 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:25:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:17,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:17,333 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:17,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:17,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2018-10-24 12:25:17,435 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:17,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 12:25:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 12:25:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:25:17,437 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-10-24 12:25:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:17,486 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-24 12:25:17,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 12:25:17,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-24 12:25:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:17,489 INFO L225 Difference]: With dead ends: 24 [2018-10-24 12:25:17,489 INFO L226 Difference]: Without dead ends: 19 [2018-10-24 12:25:17,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:25:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-24 12:25:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-10-24 12:25:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 12:25:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-24 12:25:17,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-10-24 12:25:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:17,495 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-24 12:25:17,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 12:25:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-24 12:25:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 12:25:17,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:17,497 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:17,497 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:17,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:17,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1450296376, now seen corresponding path program 2 times [2018-10-24 12:25:17,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:17,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:17,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:17,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:17,499 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:17,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:17,598 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:17,598 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:25:17,598 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:25:17,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:17,598 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:17,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:25:17,608 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:25:17,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:25:17,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:25:17,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:17,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:17,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:17,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-10-24 12:25:17,918 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:17,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:25:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:25:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:25:17,919 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-24 12:25:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:18,031 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-24 12:25:18,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:25:18,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-24 12:25:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:18,033 INFO L225 Difference]: With dead ends: 27 [2018-10-24 12:25:18,033 INFO L226 Difference]: Without dead ends: 22 [2018-10-24 12:25:18,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:25:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-24 12:25:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-24 12:25:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 12:25:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-24 12:25:18,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-10-24 12:25:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:18,040 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-24 12:25:18,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:25:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-24 12:25:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:25:18,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:18,041 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:18,041 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:18,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash 52386334, now seen corresponding path program 3 times [2018-10-24 12:25:18,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:18,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:18,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:25:18,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:18,044 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:18,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:18,178 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:18,179 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:25:18,179 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:25:18,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:18,179 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:18,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:25:18,188 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:25:18,199 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:25:18,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:25:18,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:18,211 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:18,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:18,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2018-10-24 12:25:18,311 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:18,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:25:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:25:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:18,313 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2018-10-24 12:25:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:18,365 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-24 12:25:18,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 12:25:18,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-10-24 12:25:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:18,369 INFO L225 Difference]: With dead ends: 30 [2018-10-24 12:25:18,369 INFO L226 Difference]: Without dead ends: 25 [2018-10-24 12:25:18,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-24 12:25:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-10-24 12:25:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-24 12:25:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-24 12:25:18,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2018-10-24 12:25:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:18,375 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-24 12:25:18,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:25:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-24 12:25:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 12:25:18,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:18,377 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:18,377 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:18,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1082772872, now seen corresponding path program 4 times [2018-10-24 12:25:18,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:18,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:18,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:25:18,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:18,379 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:18,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:18,537 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:18,537 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:25:18,537 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:25:18,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:18,538 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:18,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:18,554 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:25:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:18,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:18,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:18,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:18,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2018-10-24 12:25:18,728 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:18,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 12:25:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 12:25:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:18,730 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2018-10-24 12:25:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:18,816 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-24 12:25:18,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 12:25:18,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-24 12:25:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:18,818 INFO L225 Difference]: With dead ends: 33 [2018-10-24 12:25:18,818 INFO L226 Difference]: Without dead ends: 28 [2018-10-24 12:25:18,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-24 12:25:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-24 12:25:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-24 12:25:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-24 12:25:18,823 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2018-10-24 12:25:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:18,824 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-24 12:25:18,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 12:25:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-24 12:25:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-24 12:25:18,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:18,825 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:18,826 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:18,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash -38190114, now seen corresponding path program 5 times [2018-10-24 12:25:18,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:18,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:18,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:18,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:18,828 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:19,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:19,254 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:19,254 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:25:19,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:25:19,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:19,254 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:19,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:25:19,263 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:25:19,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-24 12:25:19,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:25:19,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:19,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:19,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:19,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2018-10-24 12:25:19,443 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:19,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 12:25:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 12:25:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:19,444 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-10-24 12:25:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:19,491 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-24 12:25:19,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 12:25:19,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-24 12:25:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:19,494 INFO L225 Difference]: With dead ends: 36 [2018-10-24 12:25:19,494 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 12:25:19,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 12:25:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-10-24 12:25:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-24 12:25:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-24 12:25:19,501 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2018-10-24 12:25:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:19,501 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-24 12:25:19,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 12:25:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-24 12:25:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-24 12:25:19,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:19,502 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:19,503 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:19,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:19,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2088693944, now seen corresponding path program 6 times [2018-10-24 12:25:19,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:19,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:19,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:25:19,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:19,505 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:19,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:19,646 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:19,647 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:25:19,647 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:25:19,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:19,647 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:19,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:25:19,656 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:25:19,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:25:19,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:25:19,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:19,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:19,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:19,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2018-10-24 12:25:19,840 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:19,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 12:25:19,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 12:25:19,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:19,841 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 9 states. [2018-10-24 12:25:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:19,920 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-24 12:25:19,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 12:25:19,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2018-10-24 12:25:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:19,924 INFO L225 Difference]: With dead ends: 39 [2018-10-24 12:25:19,924 INFO L226 Difference]: Without dead ends: 34 [2018-10-24 12:25:19,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-24 12:25:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-24 12:25:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-24 12:25:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-24 12:25:19,930 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2018-10-24 12:25:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:19,930 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-24 12:25:19,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 12:25:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-24 12:25:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 12:25:19,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:19,932 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:19,932 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:19,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:19,932 INFO L82 PathProgramCache]: Analyzing trace with hash 439147934, now seen corresponding path program 7 times [2018-10-24 12:25:19,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:19,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:19,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:25:19,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:19,934 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:20,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:20,100 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:20,100 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:25:20,100 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:25:20,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:20,100 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:20,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:20,108 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:25:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:20,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:20,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:20,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:20,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2018-10-24 12:25:20,309 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:20,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 12:25:20,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 12:25:20,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:20,310 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 10 states. [2018-10-24 12:25:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:20,379 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-24 12:25:20,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 12:25:20,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2018-10-24 12:25:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:20,381 INFO L225 Difference]: With dead ends: 41 [2018-10-24 12:25:20,381 INFO L226 Difference]: Without dead ends: 36 [2018-10-24 12:25:20,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:25:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-24 12:25:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-24 12:25:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-24 12:25:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-24 12:25:20,386 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2018-10-24 12:25:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:20,386 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-24 12:25:20,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 12:25:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-24 12:25:20,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 12:25:20,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:20,388 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:20,388 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:20,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1829764856, now seen corresponding path program 8 times [2018-10-24 12:25:20,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:20,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:20,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:20,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:20,390 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:20,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:20,802 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:20,802 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:25:20,802 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:25:20,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:20,803 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:25:20,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:25:20,821 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:25:20,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-24 12:25:20,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:25:20,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:20,933 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:21,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:21,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2018-10-24 12:25:21,265 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:21,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 12:25:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 12:25:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2018-10-24 12:25:21,267 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 13 states. [2018-10-24 12:25:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:21,551 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-24 12:25:21,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 12:25:21,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-10-24 12:25:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:21,553 INFO L225 Difference]: With dead ends: 44 [2018-10-24 12:25:21,553 INFO L226 Difference]: Without dead ends: 39 [2018-10-24 12:25:21,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2018-10-24 12:25:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-24 12:25:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-24 12:25:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-24 12:25:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-24 12:25:21,561 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2018-10-24 12:25:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:21,561 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-24 12:25:21,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 12:25:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-24 12:25:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 12:25:21,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:21,563 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:21,563 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:21,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:21,563 INFO L82 PathProgramCache]: Analyzing trace with hash 443950942, now seen corresponding path program 9 times [2018-10-24 12:25:21,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:21,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:21,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:25:21,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:21,565 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:21,721 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:25:21,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-10-24 12:25:21,722 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:25:21,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 12:25:21,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 12:25:21,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 12:25:21,723 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-10-24 12:25:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:21,786 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-24 12:25:21,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 12:25:21,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-24 12:25:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:21,788 INFO L225 Difference]: With dead ends: 39 [2018-10-24 12:25:21,788 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 12:25:21,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 12:25:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 12:25:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 12:25:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 12:25:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 12:25:21,790 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2018-10-24 12:25:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:21,790 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 12:25:21,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 12:25:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 12:25:21,790 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 12:25:21,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 12:25:21,981 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-10-24 12:25:21,984 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-24 12:25:21,985 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:25:21,985 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:25:21,985 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-24 12:25:21,985 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:25:21,985 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:25:21,985 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-10-24 12:25:21,985 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-10-24 12:25:21,985 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2018-10-24 12:25:21,986 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2018-10-24 12:25:21,986 INFO L425 ceAbstractionStarter]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2018-10-24 12:25:21,986 INFO L421 ceAbstractionStarter]: At program point L13-4(lines 13 15) the Hoare annotation is: (or (and (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6) (<= main_~sn~0 10)) (and (<= 1 main_~i~0) (<= main_~i~0 1) (<= main_~sn~0 0) (<= 0 main_~sn~0)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 7 main_~i~0) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= main_~i~0 7)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 4 main_~i~0) (<= main_~i~0 4)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 3) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= 4 main_~sn~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0))) [2018-10-24 12:25:21,986 INFO L421 ceAbstractionStarter]: At program point L13-5(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2018-10-24 12:25:21,987 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-24 12:25:21,987 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-24 12:25:21,987 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:25:21,987 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-24 12:25:21,987 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-24 12:25:21,987 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:25:22,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:25:22 BoogieIcfgContainer [2018-10-24 12:25:22,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:25:22,006 INFO L168 Benchmark]: Toolchain (without parser) took 6383.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -401.6 MB). Peak memory consumption was 346.1 MB. Max. memory is 7.1 GB. [2018-10-24 12:25:22,007 INFO L168 Benchmark]: CDTParser took 0.19 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. [2018-10-24 12:25:22,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:25:22,009 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.96 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:25:22,009 INFO L168 Benchmark]: Boogie Preprocessor took 23.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:25:22,010 INFO L168 Benchmark]: RCFGBuilder took 317.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -800.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:25:22,011 INFO L168 Benchmark]: TraceAbstraction took 5702.07 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 388.6 MB). Peak memory consumption was 388.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:25:22,016 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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. * CACSL2BoogieTranslator took 311.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.96 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 317.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -800.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5702.07 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 388.6 MB). Peak memory consumption was 388.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((10 <= sn && 6 <= i) && i <= 6) && sn <= 10) || (((1 <= i && i <= 1) && sn <= 0) && 0 <= sn)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((7 <= i && 12 <= sn) && sn <= 12) && i <= 7)) || (((6 <= sn && sn <= 6) && 4 <= i) && i <= 4)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 3 && sn <= 4) && 3 <= i) && 4 <= sn)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 5.6s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 147 SDtfs, 37 SDslu, 594 SDs, 0 SdLazy, 277 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 463 GetRequests, 358 SyntacticMatches, 22 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 451 NumberOfCodeBlocks, 449 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 620 ConstructedInterpolants, 0 QuantifiedInterpolants, 50914 SizeOfPredicates, 8 NumberOfNonLiveVariables, 408 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 27 InterpolantComputations, 3 PerfectInterpolantSequences, 126/1098 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...