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/Problem17_label03_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:44:16,191 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:44:16,193 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:44:16,210 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:44:16,210 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:44:16,211 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:44:16,214 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:44:16,216 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:44:16,218 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:44:16,228 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:44:16,228 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:44:16,229 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:44:16,232 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:44:16,233 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:44:16,234 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:44:16,237 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:44:16,238 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:44:16,241 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:44:16,245 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:44:16,250 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:44:16,251 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:44:16,252 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:44:16,258 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:44:16,259 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:44:16,259 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:44:16,260 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:44:16,261 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:44:16,262 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:44:16,264 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:44:16,267 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:44:16,267 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:44:16,268 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 16:44:16,269 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:44:16,269 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:44:16,272 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:44:16,272 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:44:16,273 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 16:44:16,299 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:44:16,299 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:44:16,301 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:44:16,301 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:44:16,302 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:44:16,303 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:44:16,303 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:44:16,303 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:44:16,303 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:44:16,304 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:44:16,304 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:44:16,304 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:44:16,304 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:44:16,304 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:44:16,304 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:44:16,305 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:44:16,305 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:44:16,305 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:44:16,306 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:44:16,306 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:44:16,306 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:44:16,306 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:44:16,306 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:44:16,307 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:44:16,308 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:44:16,308 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:44:16,308 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:44:16,308 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:44:16,380 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:44:16,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:44:16,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:44:16,401 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:44:16,402 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:44:16,403 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label03_true-unreach-call.c [2018-10-24 16:44:16,467 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b7695283d/0ffff53bfd6b40eabc2d0b053eed87b3/FLAG92e244a22 [2018-10-24 16:44:17,147 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:44:17,148 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label03_true-unreach-call.c [2018-10-24 16:44:17,172 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b7695283d/0ffff53bfd6b40eabc2d0b053eed87b3/FLAG92e244a22 [2018-10-24 16:44:17,194 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b7695283d/0ffff53bfd6b40eabc2d0b053eed87b3 [2018-10-24 16:44:17,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:44:17,212 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:44:17,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:44:17,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:44:17,220 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:44:17,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:44:17" (1/1) ... [2018-10-24 16:44:17,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7751cace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:17, skipping insertion in model container [2018-10-24 16:44:17,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:44:17" (1/1) ... [2018-10-24 16:44:17,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:44:17,375 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:44:18,473 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:44:18,477 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:44:18,849 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:44:18,873 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:44:18,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18 WrapperNode [2018-10-24 16:44:18,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:44:18,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:44:18,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:44:18,876 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:44:18,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:18,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:19,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:44:19,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:44:19,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:44:19,416 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:44:19,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:19,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:19,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:19,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:19,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:19,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:19,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (1/1) ... [2018-10-24 16:44:19,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:44:19,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:44:19,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:44:19,733 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:44:19,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (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 16:44:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:44:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:44:19,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:44:29,538 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:44:29,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:44:29 BoogieIcfgContainer [2018-10-24 16:44:29,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:44:29,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:44:29,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:44:29,546 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:44:29,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:44:17" (1/3) ... [2018-10-24 16:44:29,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1a9e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:44:29, skipping insertion in model container [2018-10-24 16:44:29,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:44:18" (2/3) ... [2018-10-24 16:44:29,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1a9e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:44:29, skipping insertion in model container [2018-10-24 16:44:29,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:44:29" (3/3) ... [2018-10-24 16:44:29,552 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label03_true-unreach-call.c [2018-10-24 16:44:29,562 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:44:29,571 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:44:29,589 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:44:29,634 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:44:29,635 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:44:29,635 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:44:29,635 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:44:29,635 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:44:29,635 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:44:29,635 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:44:29,636 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:44:29,636 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:44:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2018-10-24 16:44:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 16:44:29,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:44:29,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:44:29,681 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:44:29,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:44:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1705034714, now seen corresponding path program 1 times [2018-10-24 16:44:29,691 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:44:29,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:44:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:44:29,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:44:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:44:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:44:30,226 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 16:44:30,229 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:44:30,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:44:30,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:44:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:44:30,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:44:30,254 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 4 states. [2018-10-24 16:44:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:44:41,723 INFO L93 Difference]: Finished difference Result 2099 states and 3904 transitions. [2018-10-24 16:44:41,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:44:41,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2018-10-24 16:44:41,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:44:41,761 INFO L225 Difference]: With dead ends: 2099 [2018-10-24 16:44:41,761 INFO L226 Difference]: Without dead ends: 1501 [2018-10-24 16:44:41,769 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 16:44:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2018-10-24 16:44:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1499. [2018-10-24 16:44:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1499 states. [2018-10-24 16:44:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 2373 transitions. [2018-10-24 16:44:41,924 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 2373 transitions. Word has length 50 [2018-10-24 16:44:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:44:41,925 INFO L481 AbstractCegarLoop]: Abstraction has 1499 states and 2373 transitions. [2018-10-24 16:44:41,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:44:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 2373 transitions. [2018-10-24 16:44:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-24 16:44:41,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:44:41,940 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, 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] [2018-10-24 16:44:41,940 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:44:41,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:44:41,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1971642201, now seen corresponding path program 1 times [2018-10-24 16:44:41,941 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:44:41,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:44:41,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:44:41,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:44:41,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:44:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:44:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:44:42,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:44:42,307 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 16:44:42,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:44:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:44:42,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:44:42,744 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2018-10-24 16:44:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:44:42,937 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:44:42,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 16:44:42,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:44:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:44:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:44:42,940 INFO L87 Difference]: Start difference. First operand 1499 states and 2373 transitions. Second operand 7 states. [2018-10-24 16:45:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:45:07,873 INFO L93 Difference]: Finished difference Result 8703 states and 13889 transitions. [2018-10-24 16:45:07,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:45:07,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2018-10-24 16:45:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:45:07,909 INFO L225 Difference]: With dead ends: 8703 [2018-10-24 16:45:07,909 INFO L226 Difference]: Without dead ends: 7206 [2018-10-24 16:45:07,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:45:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7206 states. [2018-10-24 16:45:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7206 to 4522. [2018-10-24 16:45:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4522 states. [2018-10-24 16:45:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 6543 transitions. [2018-10-24 16:45:08,036 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 6543 transitions. Word has length 121 [2018-10-24 16:45:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:45:08,038 INFO L481 AbstractCegarLoop]: Abstraction has 4522 states and 6543 transitions. [2018-10-24 16:45:08,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:45:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 6543 transitions. [2018-10-24 16:45:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-24 16:45:08,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:45:08,053 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, 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] [2018-10-24 16:45:08,053 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:45:08,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:45:08,053 INFO L82 PathProgramCache]: Analyzing trace with hash 413999869, now seen corresponding path program 1 times [2018-10-24 16:45:08,054 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:45:08,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:45:08,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:45:08,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:45:08,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:45:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:45:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:45:08,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:45:08,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:45:08,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:45:08,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:45:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:45:08,317 INFO L87 Difference]: Start difference. First operand 4522 states and 6543 transitions. Second operand 3 states. [2018-10-24 16:45:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:45:12,873 INFO L93 Difference]: Finished difference Result 12454 states and 18409 transitions. [2018-10-24 16:45:12,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:45:12,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2018-10-24 16:45:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:45:12,912 INFO L225 Difference]: With dead ends: 12454 [2018-10-24 16:45:12,912 INFO L226 Difference]: Without dead ends: 7050 [2018-10-24 16:45:12,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 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 16:45:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2018-10-24 16:45:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 7050. [2018-10-24 16:45:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7050 states. [2018-10-24 16:45:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7050 states to 7050 states and 8700 transitions. [2018-10-24 16:45:13,066 INFO L78 Accepts]: Start accepts. Automaton has 7050 states and 8700 transitions. Word has length 162 [2018-10-24 16:45:13,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:45:13,067 INFO L481 AbstractCegarLoop]: Abstraction has 7050 states and 8700 transitions. [2018-10-24 16:45:13,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:45:13,067 INFO L276 IsEmpty]: Start isEmpty. Operand 7050 states and 8700 transitions. [2018-10-24 16:45:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-24 16:45:13,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:45:13,073 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, 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, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:45:13,073 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:45:13,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:45:13,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1968964434, now seen corresponding path program 1 times [2018-10-24 16:45:13,074 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:45:13,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:45:13,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:45:13,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:45:13,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:45:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:45:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 129 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-24 16:45:13,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:45:13,523 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 16:45:13,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:45:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:45:13,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:45:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-24 16:45:13,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:45:13,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:45:13,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:45:13,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:45:13,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:45:13,702 INFO L87 Difference]: Start difference. First operand 7050 states and 8700 transitions. Second operand 5 states. [2018-10-24 16:45:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:45:21,060 INFO L93 Difference]: Finished difference Result 17078 states and 21712 transitions. [2018-10-24 16:45:21,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:45:21,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-10-24 16:45:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:45:21,093 INFO L225 Difference]: With dead ends: 17078 [2018-10-24 16:45:21,093 INFO L226 Difference]: Without dead ends: 10457 [2018-10-24 16:45:21,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 218 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 16:45:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10457 states. [2018-10-24 16:45:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10457 to 10031. [2018-10-24 16:45:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10031 states. [2018-10-24 16:45:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10031 states to 10031 states and 12012 transitions. [2018-10-24 16:45:21,285 INFO L78 Accepts]: Start accepts. Automaton has 10031 states and 12012 transitions. Word has length 217 [2018-10-24 16:45:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:45:21,285 INFO L481 AbstractCegarLoop]: Abstraction has 10031 states and 12012 transitions. [2018-10-24 16:45:21,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:45:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 10031 states and 12012 transitions. [2018-10-24 16:45:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-24 16:45:21,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:45:21,295 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, 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, 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] [2018-10-24 16:45:21,295 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:45:21,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:45:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1141053504, now seen corresponding path program 1 times [2018-10-24 16:45:21,296 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:45:21,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:45:21,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:45:21,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:45:21,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:45:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:45:22,069 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-24 16:45:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 240 proven. 83 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-24 16:45:22,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:45:22,257 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 16:45:22,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:45:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:45:22,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:45:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 240 proven. 83 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-24 16:45:22,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:45:22,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2018-10-24 16:45:22,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:45:22,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:45:22,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:45:22,543 INFO L87 Difference]: Start difference. First operand 10031 states and 12012 transitions. Second operand 9 states. [2018-10-24 16:45:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:45:42,068 INFO L93 Difference]: Finished difference Result 22636 states and 27039 transitions. [2018-10-24 16:45:42,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:45:42,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 313 [2018-10-24 16:45:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:45:42,105 INFO L225 Difference]: With dead ends: 22636 [2018-10-24 16:45:42,105 INFO L226 Difference]: Without dead ends: 12607 [2018-10-24 16:45:42,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:45:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12607 states. [2018-10-24 16:45:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12607 to 12171. [2018-10-24 16:45:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12171 states. [2018-10-24 16:45:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12171 states to 12171 states and 14236 transitions. [2018-10-24 16:45:42,286 INFO L78 Accepts]: Start accepts. Automaton has 12171 states and 14236 transitions. Word has length 313 [2018-10-24 16:45:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:45:42,287 INFO L481 AbstractCegarLoop]: Abstraction has 12171 states and 14236 transitions. [2018-10-24 16:45:42,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:45:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 12171 states and 14236 transitions. [2018-10-24 16:45:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-10-24 16:45:42,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:45:42,298 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:45:42,298 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:45:42,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:45:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2089844490, now seen corresponding path program 1 times [2018-10-24 16:45:42,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:45:42,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:45:42,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:45:42,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:45:42,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:45:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:45:42,719 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-24 16:45:43,131 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-10-24 16:45:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 295 proven. 83 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-24 16:45:43,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:45:43,359 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 16:45:43,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:45:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:45:43,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:45:44,079 WARN L179 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 21 [2018-10-24 16:45:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2018-10-24 16:45:44,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:45:44,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 16:45:44,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:45:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:45:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:45:44,386 INFO L87 Difference]: Start difference. First operand 12171 states and 14236 transitions. Second operand 7 states. [2018-10-24 16:46:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:46:04,781 INFO L93 Difference]: Finished difference Result 36765 states and 43026 transitions. [2018-10-24 16:46:04,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:46:04,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 400 [2018-10-24 16:46:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:46:04,841 INFO L225 Difference]: With dead ends: 36765 [2018-10-24 16:46:04,842 INFO L226 Difference]: Without dead ends: 25013 [2018-10-24 16:46:04,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:46:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25013 states. [2018-10-24 16:46:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25013 to 24143. [2018-10-24 16:46:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24143 states. [2018-10-24 16:46:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24143 states to 24143 states and 27784 transitions. [2018-10-24 16:46:05,175 INFO L78 Accepts]: Start accepts. Automaton has 24143 states and 27784 transitions. Word has length 400 [2018-10-24 16:46:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:46:05,175 INFO L481 AbstractCegarLoop]: Abstraction has 24143 states and 27784 transitions. [2018-10-24 16:46:05,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:46:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 24143 states and 27784 transitions. [2018-10-24 16:46:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2018-10-24 16:46:05,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:46:05,199 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, 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, 3, 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] [2018-10-24 16:46:05,199 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:46:05,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:46:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash 216783130, now seen corresponding path program 1 times [2018-10-24 16:46:05,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:46:05,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:46:05,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:46:05,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:46:05,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:46:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:46:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 523 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-10-24 16:46:05,758 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:46:05,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:46:05,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:46:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:46:05,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:46:05,760 INFO L87 Difference]: Start difference. First operand 24143 states and 27784 transitions. Second operand 3 states. [2018-10-24 16:46:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:46:10,018 INFO L93 Difference]: Finished difference Result 53822 states and 62781 transitions. [2018-10-24 16:46:10,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:46:10,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2018-10-24 16:46:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:46:10,073 INFO L225 Difference]: With dead ends: 53822 [2018-10-24 16:46:10,073 INFO L226 Difference]: Without dead ends: 29669 [2018-10-24 16:46:10,098 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 16:46:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29669 states. [2018-10-24 16:46:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29669 to 28384. [2018-10-24 16:46:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28384 states. [2018-10-24 16:46:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28384 states to 28384 states and 32090 transitions. [2018-10-24 16:46:10,473 INFO L78 Accepts]: Start accepts. Automaton has 28384 states and 32090 transitions. Word has length 480 [2018-10-24 16:46:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:46:10,474 INFO L481 AbstractCegarLoop]: Abstraction has 28384 states and 32090 transitions. [2018-10-24 16:46:10,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:46:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 28384 states and 32090 transitions. [2018-10-24 16:46:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-10-24 16:46:10,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:46:10,492 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-10-24 16:46:10,492 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:46:10,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:46:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1961883695, now seen corresponding path program 1 times [2018-10-24 16:46:10,493 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:46:10,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:46:10,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:46:10,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:46:10,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:46:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:46:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 239 proven. 721 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 16:46:12,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:46:12,494 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 16:46:12,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:46:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:46:12,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:46:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 559 proven. 219 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-10-24 16:46:13,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:46:13,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2018-10-24 16:46:13,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:46:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:46:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:46:13,828 INFO L87 Difference]: Start difference. First operand 28384 states and 32090 transitions. Second operand 10 states. [2018-10-24 16:46:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:46:47,761 INFO L93 Difference]: Finished difference Result 96100 states and 107829 transitions. [2018-10-24 16:46:47,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 16:46:47,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 495 [2018-10-24 16:46:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:46:47,873 INFO L225 Difference]: With dead ends: 96100 [2018-10-24 16:46:47,873 INFO L226 Difference]: Without dead ends: 68570 [2018-10-24 16:46:47,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 513 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2018-10-24 16:46:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68570 states. [2018-10-24 16:46:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68570 to 43729. [2018-10-24 16:46:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43729 states. [2018-10-24 16:46:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43729 states to 43729 states and 48449 transitions. [2018-10-24 16:46:48,551 INFO L78 Accepts]: Start accepts. Automaton has 43729 states and 48449 transitions. Word has length 495 [2018-10-24 16:46:48,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:46:48,552 INFO L481 AbstractCegarLoop]: Abstraction has 43729 states and 48449 transitions. [2018-10-24 16:46:48,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:46:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 43729 states and 48449 transitions. [2018-10-24 16:46:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2018-10-24 16:46:48,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:46:48,572 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, 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, 4, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:46:48,572 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:46:48,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:46:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash 299304654, now seen corresponding path program 1 times [2018-10-24 16:46:48,573 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:46:48,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:46:48,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:46:48,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:46:48,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:46:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:46:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 830 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-10-24 16:46:49,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:46:49,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:46:49,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:46:49,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:46:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:46:49,243 INFO L87 Difference]: Start difference. First operand 43729 states and 48449 transitions. Second operand 3 states. [2018-10-24 16:46:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:46:54,108 INFO L93 Difference]: Finished difference Result 88294 states and 97783 transitions. [2018-10-24 16:46:54,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:46:54,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 512 [2018-10-24 16:46:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:46:54,164 INFO L225 Difference]: With dead ends: 88294 [2018-10-24 16:46:54,164 INFO L226 Difference]: Without dead ends: 42797 [2018-10-24 16:46:54,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 16:46:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42797 states. [2018-10-24 16:46:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42797 to 40231. [2018-10-24 16:46:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40231 states. [2018-10-24 16:46:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40231 states to 40231 states and 43863 transitions. [2018-10-24 16:46:54,724 INFO L78 Accepts]: Start accepts. Automaton has 40231 states and 43863 transitions. Word has length 512 [2018-10-24 16:46:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:46:54,724 INFO L481 AbstractCegarLoop]: Abstraction has 40231 states and 43863 transitions. [2018-10-24 16:46:54,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:46:54,725 INFO L276 IsEmpty]: Start isEmpty. Operand 40231 states and 43863 transitions. [2018-10-24 16:46:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-10-24 16:46:54,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:46:54,736 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, 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, 4, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:46:54,737 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:46:54,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:46:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash -622930724, now seen corresponding path program 1 times [2018-10-24 16:46:54,737 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:46:54,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:46:54,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:46:54,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:46:54,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:46:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:46:55,511 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 5 [2018-10-24 16:46:55,743 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 5 [2018-10-24 16:46:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 722 proven. 133 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-24 16:46:55,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:46:55,968 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:46:55,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:46:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:46:56,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:46:56,770 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2018-10-24 16:46:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 951 proven. 104 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-24 16:46:57,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:46:57,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2018-10-24 16:46:57,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:46:57,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:46:57,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:46:57,834 INFO L87 Difference]: Start difference. First operand 40231 states and 43863 transitions. Second operand 9 states. [2018-10-24 16:47:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:47:23,739 INFO L93 Difference]: Finished difference Result 121480 states and 131830 transitions. [2018-10-24 16:47:23,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 16:47:23,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 517 [2018-10-24 16:47:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:47:23,825 INFO L225 Difference]: With dead ends: 121480 [2018-10-24 16:47:23,825 INFO L226 Difference]: Without dead ends: 81665 [2018-10-24 16:47:23,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2018-10-24 16:47:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81665 states. [2018-10-24 16:47:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81665 to 62437. [2018-10-24 16:47:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62437 states. [2018-10-24 16:47:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62437 states to 62437 states and 67566 transitions. [2018-10-24 16:47:24,641 INFO L78 Accepts]: Start accepts. Automaton has 62437 states and 67566 transitions. Word has length 517 [2018-10-24 16:47:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:47:24,641 INFO L481 AbstractCegarLoop]: Abstraction has 62437 states and 67566 transitions. [2018-10-24 16:47:24,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:47:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 62437 states and 67566 transitions. [2018-10-24 16:47:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-10-24 16:47:24,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:47:24,651 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-10-24 16:47:24,652 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:47:24,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:47:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash 320296620, now seen corresponding path program 1 times [2018-10-24 16:47:24,652 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:47:24,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:47:24,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:47:24,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:47:24,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:47:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:47:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 462 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2018-10-24 16:47:25,151 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:47:25,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:47:25,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:47:25,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:47:25,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:47:25,152 INFO L87 Difference]: Start difference. First operand 62437 states and 67566 transitions. Second operand 3 states. [2018-10-24 16:47:31,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:47:31,054 INFO L93 Difference]: Finished difference Result 177480 states and 192358 transitions. [2018-10-24 16:47:31,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:47:31,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 521 [2018-10-24 16:47:31,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:47:31,170 INFO L225 Difference]: With dead ends: 177480 [2018-10-24 16:47:31,170 INFO L226 Difference]: Without dead ends: 115892 [2018-10-24 16:47:31,213 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 16:47:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115892 states. [2018-10-24 16:47:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115892 to 114602. [2018-10-24 16:47:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114602 states. [2018-10-24 16:47:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114602 states to 114602 states and 124316 transitions. [2018-10-24 16:47:32,313 INFO L78 Accepts]: Start accepts. Automaton has 114602 states and 124316 transitions. Word has length 521 [2018-10-24 16:47:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:47:32,313 INFO L481 AbstractCegarLoop]: Abstraction has 114602 states and 124316 transitions. [2018-10-24 16:47:32,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:47:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 114602 states and 124316 transitions. [2018-10-24 16:47:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2018-10-24 16:47:32,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:47:32,327 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 3, 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 16:47:32,327 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:47:32,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:47:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash -267639618, now seen corresponding path program 1 times [2018-10-24 16:47:32,328 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:47:32,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:47:32,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:47:32,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:47:32,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:47:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:47:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 812 proven. 404 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-10-24 16:47:33,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:47:33,657 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:47:33,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:47:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:47:33,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:47:34,120 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 11 [2018-10-24 16:47:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 626 proven. 0 refuted. 0 times theorem prover too weak. 837 trivial. 0 not checked. [2018-10-24 16:47:34,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:47:34,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 16:47:34,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:47:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:47:34,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:47:34,951 INFO L87 Difference]: Start difference. First operand 114602 states and 124316 transitions. Second operand 7 states. Received shutdown request... [2018-10-24 16:48:10,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 16:48:10,658 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:48:10,663 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:48:10,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:48:10 BoogieIcfgContainer [2018-10-24 16:48:10,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:48:10,664 INFO L168 Benchmark]: Toolchain (without parser) took 233455.41 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -915.5 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-24 16:48:10,666 INFO L168 Benchmark]: CDTParser took 0.23 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 16:48:10,666 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1661.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:48:10,667 INFO L168 Benchmark]: Boogie Procedure Inliner took 540.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 783.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -900.6 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:48:10,668 INFO L168 Benchmark]: Boogie Preprocessor took 315.96 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.3 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:48:10,669 INFO L168 Benchmark]: RCFGBuilder took 9807.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 497.5 MB). Peak memory consumption was 497.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:48:10,669 INFO L168 Benchmark]: TraceAbstraction took 221123.40 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -679.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-24 16:48:10,675 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1661.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 540.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 783.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -900.6 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 315.96 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.3 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9807.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 497.5 MB). Peak memory consumption was 497.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221123.40 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -679.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 155]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 155). Cancelled while BasicCegarLoop was constructing difference of abstraction (114602states) and FLOYD_HOARE automaton (currently 10 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (64210 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 591 locations, 1 error locations. TIMEOUT Result, 221.0s OverallTime, 12 OverallIterations, 7 TraceHistogramMax, 199.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5132 SDtfs, 35742 SDslu, 4020 SDs, 0 SdLazy, 75296 SolverSat, 8564 SolverUnsat, 20 SolverUnknown, 0 SolverNotchecked, 176.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2772 GetRequests, 2680 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114602occurred in iteration=11, 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: 4.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 53628 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 7013 NumberOfCodeBlocks, 7013 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 6994 ConstructedInterpolants, 270 QuantifiedInterpolants, 13370060 SizeOfPredicates, 3 NumberOfNonLiveVariables, 3537 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 19 InterpolantComputations, 9 PerfectInterpolantSequences, 10248/12130 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown