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/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label53_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:26:03,928 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:26:03,930 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:26:03,946 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:26:03,946 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:26:03,948 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:26:03,950 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:26:03,952 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:26:03,954 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:26:03,961 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:26:03,962 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:26:03,962 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:26:03,966 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:26:03,967 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:26:03,969 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:26:03,974 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:26:03,975 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:26:03,980 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:26:03,982 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:26:03,984 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:26:03,988 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:26:03,989 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:26:03,992 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:26:03,992 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:26:03,995 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:26:03,996 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:26:03,997 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:26:03,997 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:26:04,000 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:26:04,002 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:26:04,003 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:26:04,005 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 16:26:04,008 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:26:04,023 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:26:04,023 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:26:04,024 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:26:04,024 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:26:04,025 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:26:04,025 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:26:04,025 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:26:04,025 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:26:04,025 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:26:04,026 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:26:04,026 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:26:04,026 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:26:04,026 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:26:04,026 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:26:04,027 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:26:04,027 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:26:04,027 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:26:04,027 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:26:04,027 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:26:04,028 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:26:04,028 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:26:04,028 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:26:04,028 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:26:04,028 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:26:04,029 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:26:04,029 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:26:04,029 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:26:04,029 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:26:04,080 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:26:04,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:26:04,099 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:26:04,101 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:26:04,101 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:26:04,102 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label53_true-unreach-call.c [2018-10-24 16:26:04,171 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a359a6319/c3977a46d33349f3b67ccb57590b5e48/FLAG945666764 [2018-10-24 16:26:05,000 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:26:05,001 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label53_true-unreach-call.c [2018-10-24 16:26:05,039 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a359a6319/c3977a46d33349f3b67ccb57590b5e48/FLAG945666764 [2018-10-24 16:26:05,060 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a359a6319/c3977a46d33349f3b67ccb57590b5e48 [2018-10-24 16:26:05,072 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:26:05,075 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:26:05,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:26:05,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:26:05,081 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:26:05,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:26:05" (1/1) ... [2018-10-24 16:26:05,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8de4687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:05, skipping insertion in model container [2018-10-24 16:26:05,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:26:05" (1/1) ... [2018-10-24 16:26:05,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:26:05,307 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:26:06,814 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:26:06,821 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:26:07,549 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:26:07,591 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:26:07,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07 WrapperNode [2018-10-24 16:26:07,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:26:07,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:26:07,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:26:07,594 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:26:07,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:07,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:08,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:26:08,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:26:08,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:26:08,448 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:26:08,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:08,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:08,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:08,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:08,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:08,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:08,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (1/1) ... [2018-10-24 16:26:08,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:26:08,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:26:08,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:26:08,868 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:26:08,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (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 16:26:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:26:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:26:08,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:26:21,421 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:26:21,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:26:21 BoogieIcfgContainer [2018-10-24 16:26:21,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:26:21,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:26:21,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:26:21,427 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:26:21,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:26:05" (1/3) ... [2018-10-24 16:26:21,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3634d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:26:21, skipping insertion in model container [2018-10-24 16:26:21,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:26:07" (2/3) ... [2018-10-24 16:26:21,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3634d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:26:21, skipping insertion in model container [2018-10-24 16:26:21,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:26:21" (3/3) ... [2018-10-24 16:26:21,431 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label53_true-unreach-call.c [2018-10-24 16:26:21,442 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:26:21,452 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:26:21,470 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:26:21,521 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:26:21,522 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:26:21,522 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:26:21,522 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:26:21,522 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:26:21,522 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:26:21,523 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:26:21,523 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:26:21,523 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:26:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-24 16:26:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 16:26:21,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:26:21,589 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:26:21,591 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:26:21,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:26:21,598 INFO L82 PathProgramCache]: Analyzing trace with hash 18549650, now seen corresponding path program 1 times [2018-10-24 16:26:21,600 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:26:21,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:26:21,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:21,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:26:21,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:26:22,133 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:26:23,159 WARN L179 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-24 16:26:23,280 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 16:26:23,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:26:23,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:26:23,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:26:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:26:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:26:23,307 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 5 states. [2018-10-24 16:26:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:26:46,242 INFO L93 Difference]: Finished difference Result 4624 states and 8784 transitions. [2018-10-24 16:26:46,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:26:46,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-10-24 16:26:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:26:46,299 INFO L225 Difference]: With dead ends: 4624 [2018-10-24 16:26:46,300 INFO L226 Difference]: Without dead ends: 3515 [2018-10-24 16:26:46,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:26:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2018-10-24 16:26:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3514. [2018-10-24 16:26:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3514 states. [2018-10-24 16:26:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5233 transitions. [2018-10-24 16:26:46,647 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5233 transitions. Word has length 32 [2018-10-24 16:26:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:26:46,648 INFO L481 AbstractCegarLoop]: Abstraction has 3514 states and 5233 transitions. [2018-10-24 16:26:46,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:26:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5233 transitions. [2018-10-24 16:26:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-24 16:26:46,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:26:46,659 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:26:46,659 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:26:46,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:26:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1946862205, now seen corresponding path program 1 times [2018-10-24 16:26:46,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:26:46,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:26:46,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:46,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:26:46,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:26:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 16:26:47,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:26:47,238 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 16:26:47,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:26:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:26:47,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:26:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-10-24 16:26:47,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:26:47,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-10-24 16:26:47,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:26:47,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:26:47,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:26:47,600 INFO L87 Difference]: Start difference. First operand 3514 states and 5233 transitions. Second operand 5 states. [2018-10-24 16:27:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:03,220 INFO L93 Difference]: Finished difference Result 9445 states and 15288 transitions. [2018-10-24 16:27:03,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:27:03,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2018-10-24 16:27:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:03,254 INFO L225 Difference]: With dead ends: 9445 [2018-10-24 16:27:03,255 INFO L226 Difference]: Without dead ends: 6721 [2018-10-24 16:27:03,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:27:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2018-10-24 16:27:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6693. [2018-10-24 16:27:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6693 states. [2018-10-24 16:27:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6693 states to 6693 states and 9417 transitions. [2018-10-24 16:27:03,380 INFO L78 Accepts]: Start accepts. Automaton has 6693 states and 9417 transitions. Word has length 158 [2018-10-24 16:27:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:03,382 INFO L481 AbstractCegarLoop]: Abstraction has 6693 states and 9417 transitions. [2018-10-24 16:27:03,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:27:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6693 states and 9417 transitions. [2018-10-24 16:27:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-24 16:27:03,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:03,390 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:03,390 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:03,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash 586468368, now seen corresponding path program 1 times [2018-10-24 16:27:03,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:03,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:03,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:03,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:03,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:03,768 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:27:03,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:27:03,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:03,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:03,770 INFO L87 Difference]: Start difference. First operand 6693 states and 9417 transitions. Second operand 4 states. [2018-10-24 16:27:14,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:14,842 INFO L93 Difference]: Finished difference Result 15792 states and 23310 transitions. [2018-10-24 16:27:14,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:27:14,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 208 [2018-10-24 16:27:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:14,887 INFO L225 Difference]: With dead ends: 15792 [2018-10-24 16:27:14,887 INFO L226 Difference]: Without dead ends: 9889 [2018-10-24 16:27:14,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9889 states. [2018-10-24 16:27:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9889 to 9863. [2018-10-24 16:27:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9863 states. [2018-10-24 16:27:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9863 states to 9863 states and 13541 transitions. [2018-10-24 16:27:15,080 INFO L78 Accepts]: Start accepts. Automaton has 9863 states and 13541 transitions. Word has length 208 [2018-10-24 16:27:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:15,081 INFO L481 AbstractCegarLoop]: Abstraction has 9863 states and 13541 transitions. [2018-10-24 16:27:15,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:27:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 9863 states and 13541 transitions. [2018-10-24 16:27:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-24 16:27:15,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:15,092 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:15,092 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:15,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash 156908202, now seen corresponding path program 1 times [2018-10-24 16:27:15,093 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:15,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:15,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:15,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:15,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:15,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:27:15,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:27:15,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:27:15,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:27:15,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:27:15,580 INFO L87 Difference]: Start difference. First operand 9863 states and 13541 transitions. Second operand 5 states. [2018-10-24 16:27:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:32,459 INFO L93 Difference]: Finished difference Result 43673 states and 61710 transitions. [2018-10-24 16:27:32,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:27:32,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2018-10-24 16:27:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:32,564 INFO L225 Difference]: With dead ends: 43673 [2018-10-24 16:27:32,564 INFO L226 Difference]: Without dead ends: 34600 [2018-10-24 16:27:32,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:27:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34600 states. [2018-10-24 16:27:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34600 to 34418. [2018-10-24 16:27:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34418 states. [2018-10-24 16:27:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34418 states to 34418 states and 45210 transitions. [2018-10-24 16:27:33,129 INFO L78 Accepts]: Start accepts. Automaton has 34418 states and 45210 transitions. Word has length 215 [2018-10-24 16:27:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:33,130 INFO L481 AbstractCegarLoop]: Abstraction has 34418 states and 45210 transitions. [2018-10-24 16:27:33,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:27:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 34418 states and 45210 transitions. [2018-10-24 16:27:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-24 16:27:33,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:33,138 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:33,138 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:33,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:33,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1147720627, now seen corresponding path program 1 times [2018-10-24 16:27:33,139 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:33,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:33,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:33,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:33,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 59 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-24 16:27:33,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:27:33,592 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 16:27:33,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:33,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:27:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:33,842 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:27:33,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:27:33,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:33,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:33,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:33,845 INFO L87 Difference]: Start difference. First operand 34418 states and 45210 transitions. Second operand 4 states. [2018-10-24 16:27:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:48,464 INFO L93 Difference]: Finished difference Result 129565 states and 171627 transitions. [2018-10-24 16:27:48,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:27:48,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2018-10-24 16:27:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:48,676 INFO L225 Difference]: With dead ends: 129565 [2018-10-24 16:27:48,676 INFO L226 Difference]: Without dead ends: 95937 [2018-10-24 16:27:48,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95937 states. [2018-10-24 16:27:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95937 to 65145. [2018-10-24 16:27:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65145 states. [2018-10-24 16:27:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65145 states to 65145 states and 80870 transitions. [2018-10-24 16:27:50,366 INFO L78 Accepts]: Start accepts. Automaton has 65145 states and 80870 transitions. Word has length 238 [2018-10-24 16:27:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:50,367 INFO L481 AbstractCegarLoop]: Abstraction has 65145 states and 80870 transitions. [2018-10-24 16:27:50,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:27:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 65145 states and 80870 transitions. [2018-10-24 16:27:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-24 16:27:50,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:50,373 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:50,374 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:50,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:50,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1866045727, now seen corresponding path program 1 times [2018-10-24 16:27:50,375 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:50,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:50,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:50,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:50,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 59 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-24 16:27:50,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:27:50,774 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 16:27:50,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:50,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:27:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:50,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:27:50,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:27:50,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:50,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:50,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:50,983 INFO L87 Difference]: Start difference. First operand 65145 states and 80870 transitions. Second operand 4 states. [2018-10-24 16:28:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:02,489 INFO L93 Difference]: Finished difference Result 217026 states and 268981 transitions. [2018-10-24 16:28:02,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:28:02,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2018-10-24 16:28:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:02,718 INFO L225 Difference]: With dead ends: 217026 [2018-10-24 16:28:02,718 INFO L226 Difference]: Without dead ends: 152671 [2018-10-24 16:28:02,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152671 states. [2018-10-24 16:28:04,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152671 to 116363. [2018-10-24 16:28:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116363 states. [2018-10-24 16:28:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116363 states to 116363 states and 139926 transitions. [2018-10-24 16:28:04,740 INFO L78 Accepts]: Start accepts. Automaton has 116363 states and 139926 transitions. Word has length 244 [2018-10-24 16:28:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:04,741 INFO L481 AbstractCegarLoop]: Abstraction has 116363 states and 139926 transitions. [2018-10-24 16:28:04,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:28:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 116363 states and 139926 transitions. [2018-10-24 16:28:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-24 16:28:04,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:04,750 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:04,751 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:04,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:04,751 INFO L82 PathProgramCache]: Analyzing trace with hash 239092216, now seen corresponding path program 1 times [2018-10-24 16:28:04,751 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:04,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:04,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:04,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:04,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:28:04,958 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:04,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:28:04,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:28:04,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:28:04,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:28:04,959 INFO L87 Difference]: Start difference. First operand 116363 states and 139926 transitions. Second operand 3 states. [2018-10-24 16:28:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:12,713 INFO L93 Difference]: Finished difference Result 233493 states and 280541 transitions. [2018-10-24 16:28:12,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:28:12,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 273 [2018-10-24 16:28:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:12,841 INFO L225 Difference]: With dead ends: 233493 [2018-10-24 16:28:12,842 INFO L226 Difference]: Without dead ends: 117920 [2018-10-24 16:28:12,888 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 16:28:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117920 states. [2018-10-24 16:28:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117920 to 115550. [2018-10-24 16:28:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115550 states. [2018-10-24 16:28:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115550 states to 115550 states and 131049 transitions. [2018-10-24 16:28:13,809 INFO L78 Accepts]: Start accepts. Automaton has 115550 states and 131049 transitions. Word has length 273 [2018-10-24 16:28:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:13,810 INFO L481 AbstractCegarLoop]: Abstraction has 115550 states and 131049 transitions. [2018-10-24 16:28:13,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:28:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 115550 states and 131049 transitions. [2018-10-24 16:28:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-10-24 16:28:13,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:13,820 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:13,820 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:13,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:13,820 INFO L82 PathProgramCache]: Analyzing trace with hash 361068486, now seen corresponding path program 1 times [2018-10-24 16:28:13,821 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:13,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:13,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:13,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:13,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-24 16:28:14,126 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:14,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:28:14,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:28:14,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:28:14,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:14,127 INFO L87 Difference]: Start difference. First operand 115550 states and 131049 transitions. Second operand 4 states. [2018-10-24 16:28:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:25,681 INFO L93 Difference]: Finished difference Result 313807 states and 356946 transitions. [2018-10-24 16:28:25,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:28:25,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 312 [2018-10-24 16:28:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:25,957 INFO L225 Difference]: With dead ends: 313807 [2018-10-24 16:28:25,958 INFO L226 Difference]: Without dead ends: 192723 [2018-10-24 16:28:26,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192723 states. [2018-10-24 16:28:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192723 to 182469. [2018-10-24 16:28:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182469 states. [2018-10-24 16:28:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182469 states to 182469 states and 200466 transitions. [2018-10-24 16:28:27,706 INFO L78 Accepts]: Start accepts. Automaton has 182469 states and 200466 transitions. Word has length 312 [2018-10-24 16:28:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:27,706 INFO L481 AbstractCegarLoop]: Abstraction has 182469 states and 200466 transitions. [2018-10-24 16:28:27,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:28:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 182469 states and 200466 transitions. [2018-10-24 16:28:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-10-24 16:28:27,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:27,719 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:27,719 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:27,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1758930249, now seen corresponding path program 1 times [2018-10-24 16:28:27,720 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:27,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:27,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:27,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:27,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-24 16:28:29,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:29,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:28:29,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:28:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:28:29,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:29,547 INFO L87 Difference]: Start difference. First operand 182469 states and 200466 transitions. Second operand 4 states. [2018-10-24 16:28:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:40,349 INFO L93 Difference]: Finished difference Result 374393 states and 410815 transitions. [2018-10-24 16:28:40,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:28:40,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 390 [2018-10-24 16:28:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:40,588 INFO L225 Difference]: With dead ends: 374393 [2018-10-24 16:28:40,588 INFO L226 Difference]: Without dead ends: 173750 [2018-10-24 16:28:40,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173750 states. [2018-10-24 16:28:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173750 to 165869. [2018-10-24 16:28:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165869 states. [2018-10-24 16:28:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165869 states to 165869 states and 180776 transitions. [2018-10-24 16:28:42,262 INFO L78 Accepts]: Start accepts. Automaton has 165869 states and 180776 transitions. Word has length 390 [2018-10-24 16:28:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:42,263 INFO L481 AbstractCegarLoop]: Abstraction has 165869 states and 180776 transitions. [2018-10-24 16:28:42,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:28:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 165869 states and 180776 transitions. [2018-10-24 16:28:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2018-10-24 16:28:42,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:42,274 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:42,274 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:42,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:42,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2093556076, now seen corresponding path program 1 times [2018-10-24 16:28:42,275 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:42,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:42,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:42,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:42,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 413 proven. 5 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-24 16:28:43,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:28:43,843 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 16:28:43,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:43,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:28:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-10-24 16:28:44,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:28:44,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-24 16:28:44,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:28:44,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:28:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:28:44,166 INFO L87 Difference]: Start difference. First operand 165869 states and 180776 transitions. Second operand 8 states. [2018-10-24 16:29:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:29:08,313 INFO L93 Difference]: Finished difference Result 331878 states and 361510 transitions. [2018-10-24 16:29:08,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 16:29:08,313 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 451 [2018-10-24 16:29:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:29:08,488 INFO L225 Difference]: With dead ends: 331878 [2018-10-24 16:29:08,489 INFO L226 Difference]: Without dead ends: 162831 [2018-10-24 16:29:08,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 457 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:29:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162831 states. [2018-10-24 16:29:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162831 to 148499. [2018-10-24 16:29:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148499 states. [2018-10-24 16:29:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148499 states to 148499 states and 157328 transitions. [2018-10-24 16:29:10,201 INFO L78 Accepts]: Start accepts. Automaton has 148499 states and 157328 transitions. Word has length 451 [2018-10-24 16:29:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:29:10,202 INFO L481 AbstractCegarLoop]: Abstraction has 148499 states and 157328 transitions. [2018-10-24 16:29:10,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:29:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand 148499 states and 157328 transitions. [2018-10-24 16:29:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2018-10-24 16:29:10,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:29:10,213 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:29:10,213 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:29:10,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:29:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2121412464, now seen corresponding path program 1 times [2018-10-24 16:29:10,214 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:29:10,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:29:10,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:10,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:10,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:29:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 435 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-24 16:29:10,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:29:10,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:29:10,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:29:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:29:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:29:10,898 INFO L87 Difference]: Start difference. First operand 148499 states and 157328 transitions. Second operand 4 states. [2018-10-24 16:29:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:29:20,945 INFO L93 Difference]: Finished difference Result 298591 states and 316303 transitions. [2018-10-24 16:29:20,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:29:20,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 512 [2018-10-24 16:29:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:29:21,109 INFO L225 Difference]: With dead ends: 298591 [2018-10-24 16:29:21,110 INFO L226 Difference]: Without dead ends: 148510 [2018-10-24 16:29:21,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:29:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148510 states. [2018-10-24 16:29:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148510 to 144548. [2018-10-24 16:29:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144548 states. [2018-10-24 16:29:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144548 states to 144548 states and 150997 transitions. [2018-10-24 16:29:23,117 INFO L78 Accepts]: Start accepts. Automaton has 144548 states and 150997 transitions. Word has length 512 [2018-10-24 16:29:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:29:23,118 INFO L481 AbstractCegarLoop]: Abstraction has 144548 states and 150997 transitions. [2018-10-24 16:29:23,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:29:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 144548 states and 150997 transitions. [2018-10-24 16:29:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-10-24 16:29:23,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:29:23,129 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:29:23,129 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:29:23,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:29:23,130 INFO L82 PathProgramCache]: Analyzing trace with hash -205855217, now seen corresponding path program 1 times [2018-10-24 16:29:23,130 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:29:23,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:29:23,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:23,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:23,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:29:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2018-10-24 16:29:24,177 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:29:24,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:29:24,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:29:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:29:24,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:29:24,178 INFO L87 Difference]: Start difference. First operand 144548 states and 150997 transitions. Second operand 3 states. [2018-10-24 16:29:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:29:32,122 INFO L93 Difference]: Finished difference Result 287506 states and 300268 transitions. [2018-10-24 16:29:32,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:29:32,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 522 [2018-10-24 16:29:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:29:32,271 INFO L225 Difference]: With dead ends: 287506 [2018-10-24 16:29:32,271 INFO L226 Difference]: Without dead ends: 143746 [2018-10-24 16:29:32,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:29:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143746 states. [2018-10-24 16:29:34,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143746 to 142958. [2018-10-24 16:29:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142958 states. [2018-10-24 16:29:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142958 states to 142958 states and 149220 transitions. [2018-10-24 16:29:34,245 INFO L78 Accepts]: Start accepts. Automaton has 142958 states and 149220 transitions. Word has length 522 [2018-10-24 16:29:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:29:34,245 INFO L481 AbstractCegarLoop]: Abstraction has 142958 states and 149220 transitions. [2018-10-24 16:29:34,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:29:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 142958 states and 149220 transitions. [2018-10-24 16:29:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2018-10-24 16:29:34,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:29:34,257 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:29:34,257 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:29:34,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:29:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1031849718, now seen corresponding path program 1 times [2018-10-24 16:29:34,257 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:29:34,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:29:34,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:34,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:34,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:29:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 435 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-24 16:29:34,938 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:29:34,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:29:34,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:29:34,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:29:34,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:29:34,939 INFO L87 Difference]: Start difference. First operand 142958 states and 149220 transitions. Second operand 4 states. [2018-10-24 16:29:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:29:49,894 INFO L93 Difference]: Finished difference Result 315924 states and 330175 transitions. [2018-10-24 16:29:49,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:29:49,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 535 [2018-10-24 16:29:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:29:50,113 INFO L225 Difference]: With dead ends: 315924 [2018-10-24 16:29:50,113 INFO L226 Difference]: Without dead ends: 173756 [2018-10-24 16:29:50,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:29:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173756 states. [2018-10-24 16:29:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173756 to 168973. [2018-10-24 16:29:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168973 states. [2018-10-24 16:29:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168973 states to 168973 states and 175916 transitions. [2018-10-24 16:29:52,346 INFO L78 Accepts]: Start accepts. Automaton has 168973 states and 175916 transitions. Word has length 535 [2018-10-24 16:29:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:29:52,347 INFO L481 AbstractCegarLoop]: Abstraction has 168973 states and 175916 transitions. [2018-10-24 16:29:52,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:29:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 168973 states and 175916 transitions. [2018-10-24 16:29:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2018-10-24 16:29:52,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:29:52,372 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:29:52,372 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:29:52,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:29:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash 960867478, now seen corresponding path program 1 times [2018-10-24 16:29:52,373 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:29:52,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:29:52,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:52,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:52,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:29:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 861 proven. 16 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2018-10-24 16:29:53,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:29:53,858 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 16:29:53,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:29:54,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:29:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 861 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-10-24 16:29:54,321 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:29:54,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:29:54,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:29:54,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:29:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:29:54,323 INFO L87 Difference]: Start difference. First operand 168973 states and 175916 transitions. Second operand 5 states. Received shutdown request... [2018-10-24 16:29:57,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:29:57,048 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:29:57,053 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:29:57,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:29:57 BoogieIcfgContainer [2018-10-24 16:29:57,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:29:57,054 INFO L168 Benchmark]: Toolchain (without parser) took 231981.64 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-24 16:29:57,055 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:29:57,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2516.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:29:57,057 INFO L168 Benchmark]: Boogie Procedure Inliner took 854.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 813.7 MB). Free memory was 1.1 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:29:57,058 INFO L168 Benchmark]: Boogie Preprocessor took 419.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 64.3 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:29:57,059 INFO L168 Benchmark]: RCFGBuilder took 12554.99 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 272.6 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -22.7 MB). Peak memory consumption was 632.6 MB. Max. memory is 7.1 GB. [2018-10-24 16:29:57,063 INFO L168 Benchmark]: TraceAbstraction took 215629.96 ms. Allocated memory was 2.6 GB in the beginning and 4.5 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -529.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-24 16:29:57,069 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2516.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 854.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 813.7 MB). Free memory was 1.1 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 419.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 64.3 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12554.99 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 272.6 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -22.7 MB). Peak memory consumption was 632.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215629.96 ms. Allocated memory was 2.6 GB in the beginning and 4.5 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -529.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 105). Cancelled while BasicCegarLoop was constructing difference of abstraction (168973states) and FLOYD_HOARE automaton (currently 5 states, 5 states before enhancement),while ReachableStatesComputation was computing reachable states (5341 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 215.5s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 185.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10305 SDtfs, 37140 SDslu, 3631 SDs, 0 SdLazy, 70143 SolverSat, 17646 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 145.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1860 GetRequests, 1812 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=182469occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 16.5s AutomataMinimizationTime, 13 MinimizatonAttempts, 111707 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 6587 NumberOfCodeBlocks, 6587 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 6568 ConstructedInterpolants, 0 QuantifiedInterpolants, 7158537 SizeOfPredicates, 3 NumberOfNonLiveVariables, 2386 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 19 InterpolantComputations, 14 PerfectInterpolantSequences, 7535/7570 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown