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_label34_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:27:41,213 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:27:41,215 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:27:41,228 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:27:41,228 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:27:41,229 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:27:41,230 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:27:41,232 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:27:41,234 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:27:41,235 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:27:41,236 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:27:41,236 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:27:41,237 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:27:41,238 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:27:41,239 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:27:41,240 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:27:41,241 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:27:41,242 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:27:41,245 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:27:41,246 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:27:41,247 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:27:41,252 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:27:41,257 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:27:41,257 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:27:41,257 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:27:41,258 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:27:41,262 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:27:41,263 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:27:41,264 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:27:41,268 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:27:41,268 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:27:41,269 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:27:41,269 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:27:41,270 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:27:41,271 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:27:41,272 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:27:41,272 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 [2018-10-26 21:27:41,287 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:27:41,287 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:27:41,288 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:27:41,288 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:27:41,289 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:27:41,289 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:27:41,289 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:27:41,289 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:27:41,289 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:27:41,290 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:27:41,290 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:27:41,290 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:27:41,290 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:27:41,290 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:27:41,291 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:27:41,291 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:27:41,291 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:27:41,291 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:27:41,291 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:27:41,291 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:27:41,292 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:27:41,292 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:27:41,292 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:27:41,292 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:27:41,292 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:27:41,293 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:27:41,296 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:27:41,297 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 21:27:41,349 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:27:41,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:27:41,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:27:41,368 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:27:41,368 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:27:41,369 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label34_true-unreach-call.c [2018-10-26 21:27:41,431 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0817cc98a/a805892d0df24d42afc5dead4d98728c/FLAG531be4ee4 [2018-10-26 21:27:42,200 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:27:42,200 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label34_true-unreach-call.c [2018-10-26 21:27:42,237 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0817cc98a/a805892d0df24d42afc5dead4d98728c/FLAG531be4ee4 [2018-10-26 21:27:42,258 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0817cc98a/a805892d0df24d42afc5dead4d98728c [2018-10-26 21:27:42,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:27:42,273 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:27:42,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:27:42,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:27:42,282 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:27:42,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:27:42" (1/1) ... [2018-10-26 21:27:42,286 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 26.10 09:27:42, skipping insertion in model container [2018-10-26 21:27:42,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:27:42" (1/1) ... [2018-10-26 21:27:42,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:27:42,461 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:27:43,906 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:27:43,910 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:27:44,708 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:27:44,748 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:27:44,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44 WrapperNode [2018-10-26 21:27:44,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:27:44,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:27:44,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:27:44,751 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:27:44,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:44,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:45,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:27:45,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:27:45,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:27:45,560 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:27:45,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:45,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:45,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:45,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:45,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:45,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:46,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (1/1) ... [2018-10-26 21:27:46,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:27:46,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:27:46,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:27:46,094 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:27:46,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (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 [2018-10-26 21:27:46,173 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 21:27:46,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:27:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:28:00,707 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:28:00,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:28:00 BoogieIcfgContainer [2018-10-26 21:28:00,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:28:00,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:28:00,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:28:00,713 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:28:00,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:27:42" (1/3) ... [2018-10-26 21:28:00,714 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 26.10 09:28:00, skipping insertion in model container [2018-10-26 21:28:00,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:44" (2/3) ... [2018-10-26 21:28:00,714 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 26.10 09:28:00, skipping insertion in model container [2018-10-26 21:28:00,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:28:00" (3/3) ... [2018-10-26 21:28:00,717 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label34_true-unreach-call.c [2018-10-26 21:28:00,726 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:28:00,736 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:28:00,754 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:28:00,800 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:28:00,801 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:28:00,801 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:28:00,801 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:28:00,801 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:28:00,802 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:28:00,802 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:28:00,802 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:28:00,802 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:28:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-26 21:28:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-26 21:28:00,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:28:00,861 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, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:28:00,864 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:28:00,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:28:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1848943538, now seen corresponding path program 1 times [2018-10-26 21:28:00,871 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:28:00,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:28:00,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:28:00,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:28:00,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:28:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:28:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:28:01,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:28:01,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:28:01,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:28:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:28:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:28:01,384 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-26 21:28:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:28:21,800 INFO L93 Difference]: Finished difference Result 3896 states and 7286 transitions. [2018-10-26 21:28:21,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:28:21,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-10-26 21:28:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:28:21,849 INFO L225 Difference]: With dead ends: 3896 [2018-10-26 21:28:21,849 INFO L226 Difference]: Without dead ends: 2790 [2018-10-26 21:28:21,859 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 [2018-10-26 21:28:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2018-10-26 21:28:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1945. [2018-10-26 21:28:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2018-10-26 21:28:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 3412 transitions. [2018-10-26 21:28:22,014 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 3412 transitions. Word has length 57 [2018-10-26 21:28:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:28:22,015 INFO L481 AbstractCegarLoop]: Abstraction has 1945 states and 3412 transitions. [2018-10-26 21:28:22,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:28:22,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 3412 transitions. [2018-10-26 21:28:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-26 21:28:22,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:28:22,021 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:28:22,021 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:28:22,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:28:22,022 INFO L82 PathProgramCache]: Analyzing trace with hash 591180937, now seen corresponding path program 1 times [2018-10-26 21:28:22,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:28:22,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:28:22,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:28:22,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:28:22,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:28:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:28:22,644 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 4 [2018-10-26 21:28:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:28:22,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:28:22,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:28:22,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:28:22,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:28:22,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:28:22,892 INFO L87 Difference]: Start difference. First operand 1945 states and 3412 transitions. Second operand 5 states. [2018-10-26 21:28:23,188 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-26 21:28:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:28:39,605 INFO L93 Difference]: Finished difference Result 7061 states and 12475 transitions. [2018-10-26 21:28:39,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:28:39,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2018-10-26 21:28:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:28:39,636 INFO L225 Difference]: With dead ends: 7061 [2018-10-26 21:28:39,636 INFO L226 Difference]: Without dead ends: 5118 [2018-10-26 21:28:39,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:28:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2018-10-26 21:28:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 5117. [2018-10-26 21:28:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5117 states. [2018-10-26 21:28:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 7612 transitions. [2018-10-26 21:28:39,746 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 7612 transitions. Word has length 123 [2018-10-26 21:28:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:28:39,747 INFO L481 AbstractCegarLoop]: Abstraction has 5117 states and 7612 transitions. [2018-10-26 21:28:39,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:28:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 7612 transitions. [2018-10-26 21:28:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-26 21:28:39,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:28:39,761 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, 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] [2018-10-26 21:28:39,762 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:28:39,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:28:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2132882266, now seen corresponding path program 1 times [2018-10-26 21:28:39,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:28:39,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:28:39,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:28:39,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:28:39,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:28:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:28:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:28:40,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:28:40,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:28:40,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:28:40,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:28:40,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:28:40,008 INFO L87 Difference]: Start difference. First operand 5117 states and 7612 transitions. Second operand 3 states. [2018-10-26 21:28:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:28:46,523 INFO L93 Difference]: Finished difference Result 10220 states and 15517 transitions. [2018-10-26 21:28:46,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:28:46,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2018-10-26 21:28:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:28:46,550 INFO L225 Difference]: With dead ends: 10220 [2018-10-26 21:28:46,551 INFO L226 Difference]: Without dead ends: 5893 [2018-10-26 21:28:46,558 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 [2018-10-26 21:28:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5893 states. [2018-10-26 21:28:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5893 to 5892. [2018-10-26 21:28:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5892 states. [2018-10-26 21:28:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5892 states to 5892 states and 7437 transitions. [2018-10-26 21:28:46,664 INFO L78 Accepts]: Start accepts. Automaton has 5892 states and 7437 transitions. Word has length 183 [2018-10-26 21:28:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:28:46,665 INFO L481 AbstractCegarLoop]: Abstraction has 5892 states and 7437 transitions. [2018-10-26 21:28:46,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:28:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 5892 states and 7437 transitions. [2018-10-26 21:28:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-26 21:28:46,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:28:46,671 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:28:46,671 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:28:46,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:28:46,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1133001011, now seen corresponding path program 1 times [2018-10-26 21:28:46,672 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:28:46,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:28:46,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:28:46,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:28:46,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:28:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:28:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 109 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 21:28:47,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:28:47,093 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 [2018-10-26 21:28:47,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:28:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:28:47,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:28:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:28:47,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:28:47,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-26 21:28:47,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:28:47,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:28:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:28:47,393 INFO L87 Difference]: Start difference. First operand 5892 states and 7437 transitions. Second operand 5 states. [2018-10-26 21:29:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:29:02,119 INFO L93 Difference]: Finished difference Result 20501 states and 27031 transitions. [2018-10-26 21:29:02,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:29:02,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2018-10-26 21:29:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:29:02,181 INFO L225 Difference]: With dead ends: 20501 [2018-10-26 21:29:02,181 INFO L226 Difference]: Without dead ends: 15399 [2018-10-26 21:29:02,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:29:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15399 states. [2018-10-26 21:29:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15399 to 10627. [2018-10-26 21:29:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10627 states. [2018-10-26 21:29:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10627 states to 10627 states and 13141 transitions. [2018-10-26 21:29:02,453 INFO L78 Accepts]: Start accepts. Automaton has 10627 states and 13141 transitions. Word has length 222 [2018-10-26 21:29:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:29:02,454 INFO L481 AbstractCegarLoop]: Abstraction has 10627 states and 13141 transitions. [2018-10-26 21:29:02,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:29:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10627 states and 13141 transitions. [2018-10-26 21:29:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-26 21:29:02,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:29:02,459 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:29:02,460 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:29:02,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:29:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 268993022, now seen corresponding path program 1 times [2018-10-26 21:29:02,460 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:29:02,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:29:02,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:02,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:02,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-10-26 21:29:02,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:29:02,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 21:29:02,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:29:02,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:29:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:29:02,733 INFO L87 Difference]: Start difference. First operand 10627 states and 13141 transitions. Second operand 3 states. [2018-10-26 21:29:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:29:08,417 INFO L93 Difference]: Finished difference Result 28343 states and 35767 transitions. [2018-10-26 21:29:08,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:29:08,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-10-26 21:29:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:29:08,454 INFO L225 Difference]: With dead ends: 28343 [2018-10-26 21:29:08,454 INFO L226 Difference]: Without dead ends: 18506 [2018-10-26 21:29:08,468 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 [2018-10-26 21:29:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18506 states. [2018-10-26 21:29:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18506 to 18505. [2018-10-26 21:29:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18505 states. [2018-10-26 21:29:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18505 states to 18505 states and 22008 transitions. [2018-10-26 21:29:08,761 INFO L78 Accepts]: Start accepts. Automaton has 18505 states and 22008 transitions. Word has length 233 [2018-10-26 21:29:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:29:08,761 INFO L481 AbstractCegarLoop]: Abstraction has 18505 states and 22008 transitions. [2018-10-26 21:29:08,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:29:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 18505 states and 22008 transitions. [2018-10-26 21:29:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-26 21:29:08,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:29:08,767 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:29:08,767 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:29:08,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:29:08,768 INFO L82 PathProgramCache]: Analyzing trace with hash 787888975, now seen corresponding path program 1 times [2018-10-26 21:29:08,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:29:08,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:29:08,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:08,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:08,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:09,347 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 6 [2018-10-26 21:29:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-26 21:29:09,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:29:09,458 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 [2018-10-26 21:29:09,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:09,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:29:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:29:09,732 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:29:09,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 21:29:09,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:29:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:29:09,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:09,734 INFO L87 Difference]: Start difference. First operand 18505 states and 22008 transitions. Second operand 4 states. [2018-10-26 21:29:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:29:18,560 INFO L93 Difference]: Finished difference Result 44141 states and 51712 transitions. [2018-10-26 21:29:18,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:29:18,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 271 [2018-10-26 21:29:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:29:18,601 INFO L225 Difference]: With dead ends: 44141 [2018-10-26 21:29:18,601 INFO L226 Difference]: Without dead ends: 21648 [2018-10-26 21:29:18,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21648 states. [2018-10-26 21:29:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21648 to 19266. [2018-10-26 21:29:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19266 states. [2018-10-26 21:29:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19266 states to 19266 states and 22668 transitions. [2018-10-26 21:29:18,900 INFO L78 Accepts]: Start accepts. Automaton has 19266 states and 22668 transitions. Word has length 271 [2018-10-26 21:29:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:29:18,901 INFO L481 AbstractCegarLoop]: Abstraction has 19266 states and 22668 transitions. [2018-10-26 21:29:18,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:29:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 19266 states and 22668 transitions. [2018-10-26 21:29:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-10-26 21:29:18,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:29:18,908 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:29:18,908 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:29:18,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:29:18,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2055948998, now seen corresponding path program 1 times [2018-10-26 21:29:18,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:29:18,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:29:18,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:18,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:18,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:19,385 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-26 21:29:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:29:19,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:29:19,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:29:19,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:29:19,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:29:19,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:19,533 INFO L87 Difference]: Start difference. First operand 19266 states and 22668 transitions. Second operand 4 states. [2018-10-26 21:29:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:29:30,800 INFO L93 Difference]: Finished difference Result 41683 states and 48797 transitions. [2018-10-26 21:29:30,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:29:30,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 300 [2018-10-26 21:29:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:29:30,829 INFO L225 Difference]: With dead ends: 41683 [2018-10-26 21:29:30,830 INFO L226 Difference]: Without dead ends: 21594 [2018-10-26 21:29:30,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21594 states. [2018-10-26 21:29:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21594 to 19229. [2018-10-26 21:29:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19229 states. [2018-10-26 21:29:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19229 states to 19229 states and 22239 transitions. [2018-10-26 21:29:31,081 INFO L78 Accepts]: Start accepts. Automaton has 19229 states and 22239 transitions. Word has length 300 [2018-10-26 21:29:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:29:31,082 INFO L481 AbstractCegarLoop]: Abstraction has 19229 states and 22239 transitions. [2018-10-26 21:29:31,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:29:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 19229 states and 22239 transitions. [2018-10-26 21:29:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-10-26 21:29:31,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:29:31,089 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:29:31,089 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:29:31,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:29:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -424530140, now seen corresponding path program 1 times [2018-10-26 21:29:31,089 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:29:31,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:29:31,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:31,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:31,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-10-26 21:29:31,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:29:31,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:29:31,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:29:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:29:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:31,561 INFO L87 Difference]: Start difference. First operand 19229 states and 22239 transitions. Second operand 4 states. [2018-10-26 21:29:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:29:41,836 INFO L93 Difference]: Finished difference Result 68437 states and 79694 transitions. [2018-10-26 21:29:41,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:29:41,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 305 [2018-10-26 21:29:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:29:41,896 INFO L225 Difference]: With dead ends: 68437 [2018-10-26 21:29:41,896 INFO L226 Difference]: Without dead ends: 49206 [2018-10-26 21:29:41,915 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 [2018-10-26 21:29:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49206 states. [2018-10-26 21:29:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49206 to 47597. [2018-10-26 21:29:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47597 states. [2018-10-26 21:29:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47597 states to 47597 states and 53239 transitions. [2018-10-26 21:29:42,427 INFO L78 Accepts]: Start accepts. Automaton has 47597 states and 53239 transitions. Word has length 305 [2018-10-26 21:29:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:29:42,428 INFO L481 AbstractCegarLoop]: Abstraction has 47597 states and 53239 transitions. [2018-10-26 21:29:42,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:29:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 47597 states and 53239 transitions. [2018-10-26 21:29:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-10-26 21:29:42,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:29:42,445 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:29:42,446 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:29:42,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:29:42,446 INFO L82 PathProgramCache]: Analyzing trace with hash 966754319, now seen corresponding path program 1 times [2018-10-26 21:29:42,446 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:29:42,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:29:42,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:42,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:42,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2018-10-26 21:29:43,071 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:29:43,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:29:43,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:29:43,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:29:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:29:43,072 INFO L87 Difference]: Start difference. First operand 47597 states and 53239 transitions. Second operand 3 states. [2018-10-26 21:29:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:29:50,903 INFO L93 Difference]: Finished difference Result 95191 states and 106548 transitions. [2018-10-26 21:29:50,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:29:50,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 413 [2018-10-26 21:29:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:29:50,971 INFO L225 Difference]: With dead ends: 95191 [2018-10-26 21:29:50,971 INFO L226 Difference]: Without dead ends: 48384 [2018-10-26 21:29:51,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:29:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48384 states. [2018-10-26 21:29:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48384 to 48383. [2018-10-26 21:29:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48383 states. [2018-10-26 21:29:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48383 states to 48383 states and 52714 transitions. [2018-10-26 21:29:52,046 INFO L78 Accepts]: Start accepts. Automaton has 48383 states and 52714 transitions. Word has length 413 [2018-10-26 21:29:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:29:52,047 INFO L481 AbstractCegarLoop]: Abstraction has 48383 states and 52714 transitions. [2018-10-26 21:29:52,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:29:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 48383 states and 52714 transitions. [2018-10-26 21:29:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2018-10-26 21:29:52,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:29:52,074 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, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:29:52,075 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:29:52,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:29:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1667699618, now seen corresponding path program 1 times [2018-10-26 21:29:52,075 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:29:52,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:29:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:52,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 902 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2018-10-26 21:29:52,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:29:52,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:29:52,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:29:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:29:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:52,783 INFO L87 Difference]: Start difference. First operand 48383 states and 52714 transitions. Second operand 4 states. [2018-10-26 21:30:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:30:06,719 INFO L93 Difference]: Finished difference Result 127518 states and 139428 transitions. [2018-10-26 21:30:06,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:30:06,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 654 [2018-10-26 21:30:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:30:06,816 INFO L225 Difference]: With dead ends: 127518 [2018-10-26 21:30:06,817 INFO L226 Difference]: Without dead ends: 79132 [2018-10-26 21:30:06,848 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 [2018-10-26 21:30:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79132 states. [2018-10-26 21:30:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79132 to 75170. [2018-10-26 21:30:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75170 states. [2018-10-26 21:30:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75170 states to 75170 states and 80880 transitions. [2018-10-26 21:30:07,623 INFO L78 Accepts]: Start accepts. Automaton has 75170 states and 80880 transitions. Word has length 654 [2018-10-26 21:30:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:30:07,624 INFO L481 AbstractCegarLoop]: Abstraction has 75170 states and 80880 transitions. [2018-10-26 21:30:07,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:30:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 75170 states and 80880 transitions. [2018-10-26 21:30:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2018-10-26 21:30:07,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:30:07,743 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:30:07,743 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:30:07,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:30:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1561064601, now seen corresponding path program 1 times [2018-10-26 21:30:07,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:30:07,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:30:07,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:07,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:30:07,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:30:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 601 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-10-26 21:30:09,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:30:09,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:30:09,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:30:09,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:30:09,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:30:09,012 INFO L87 Difference]: Start difference. First operand 75170 states and 80880 transitions. Second operand 5 states. [2018-10-26 21:30:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:30:30,155 INFO L93 Difference]: Finished difference Result 269555 states and 289573 transitions. [2018-10-26 21:30:30,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:30:30,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1113 [2018-10-26 21:30:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:30:30,362 INFO L225 Difference]: With dead ends: 269555 [2018-10-26 21:30:30,362 INFO L226 Difference]: Without dead ends: 195174 [2018-10-26 21:30:30,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:30:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195174 states. [2018-10-26 21:30:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195174 to 184771. [2018-10-26 21:30:32,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184771 states. [2018-10-26 21:30:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184771 states to 184771 states and 196351 transitions. [2018-10-26 21:30:32,621 INFO L78 Accepts]: Start accepts. Automaton has 184771 states and 196351 transitions. Word has length 1113 [2018-10-26 21:30:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:30:32,622 INFO L481 AbstractCegarLoop]: Abstraction has 184771 states and 196351 transitions. [2018-10-26 21:30:32,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:30:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 184771 states and 196351 transitions. [2018-10-26 21:30:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1190 [2018-10-26 21:30:32,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:30:32,733 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:30:32,734 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:30:32,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:30:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash 79212995, now seen corresponding path program 1 times [2018-10-26 21:30:32,734 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:30:32,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:30:32,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:32,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:30:32,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:30:33,282 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-26 21:30:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 854 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-10-26 21:30:34,611 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:30:34,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:30:34,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:30:34,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:30:34,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:30:34,613 INFO L87 Difference]: Start difference. First operand 184771 states and 196351 transitions. Second operand 4 states. [2018-10-26 21:30:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:30:44,941 INFO L93 Difference]: Finished difference Result 367993 states and 391163 transitions. [2018-10-26 21:30:44,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:30:44,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1189 [2018-10-26 21:30:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:30:45,162 INFO L225 Difference]: With dead ends: 367993 [2018-10-26 21:30:45,162 INFO L226 Difference]: Without dead ends: 184011 [2018-10-26 21:30:45,238 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 [2018-10-26 21:30:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184011 states. [2018-10-26 21:30:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184011 to 169786. [2018-10-26 21:30:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169786 states. [2018-10-26 21:30:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169786 states to 169786 states and 175757 transitions. [2018-10-26 21:30:46,782 INFO L78 Accepts]: Start accepts. Automaton has 169786 states and 175757 transitions. Word has length 1189 [2018-10-26 21:30:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:30:46,783 INFO L481 AbstractCegarLoop]: Abstraction has 169786 states and 175757 transitions. [2018-10-26 21:30:46,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:30:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 169786 states and 175757 transitions. [2018-10-26 21:30:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1197 [2018-10-26 21:30:46,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:30:46,873 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:30:46,873 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:30:46,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:30:46,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1653764469, now seen corresponding path program 1 times [2018-10-26 21:30:46,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:30:46,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:30:46,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:46,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:30:46,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:30:47,628 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-26 21:30:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 882 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-10-26 21:30:49,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:30:49,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:30:49,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:30:49,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:30:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:30:49,506 INFO L87 Difference]: Start difference. First operand 169786 states and 175757 transitions. Second operand 4 states. [2018-10-26 21:30:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:30:58,201 INFO L93 Difference]: Finished difference Result 344307 states and 356326 transitions. [2018-10-26 21:30:58,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:30:58,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1196 [2018-10-26 21:30:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:30:58,400 INFO L225 Difference]: With dead ends: 344307 [2018-10-26 21:30:58,401 INFO L226 Difference]: Without dead ends: 175311 [2018-10-26 21:30:58,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:30:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175311 states. [2018-10-26 21:31:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175311 to 171362. [2018-10-26 21:31:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171362 states. [2018-10-26 21:31:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171362 states to 171362 states and 177230 transitions. [2018-10-26 21:31:01,109 INFO L78 Accepts]: Start accepts. Automaton has 171362 states and 177230 transitions. Word has length 1196 [2018-10-26 21:31:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:31:01,110 INFO L481 AbstractCegarLoop]: Abstraction has 171362 states and 177230 transitions. [2018-10-26 21:31:01,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:31:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 171362 states and 177230 transitions. [2018-10-26 21:31:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1221 [2018-10-26 21:31:01,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:31:01,176 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, 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, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:31:01,176 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:31:01,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:31:01,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1387546168, now seen corresponding path program 1 times [2018-10-26 21:31:01,177 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:31:01,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:31:01,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:01,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:31:01,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:31:01,689 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-26 21:31:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 943 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-10-26 21:31:03,595 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:31:03,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:31:03,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:31:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:31:03,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:31:03,598 INFO L87 Difference]: Start difference. First operand 171362 states and 177230 transitions. Second operand 4 states. [2018-10-26 21:31:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:31:17,305 INFO L93 Difference]: Finished difference Result 378283 states and 391444 transitions. [2018-10-26 21:31:17,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:31:17,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1220 [2018-10-26 21:31:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:31:17,513 INFO L225 Difference]: With dead ends: 378283 [2018-10-26 21:31:17,513 INFO L226 Difference]: Without dead ends: 207711 [2018-10-26 21:31:17,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:31:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207711 states. [2018-10-26 21:31:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207711 to 200521. [2018-10-26 21:31:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200521 states. [2018-10-26 21:31:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200521 states to 200521 states and 207315 transitions. [2018-10-26 21:31:20,499 INFO L78 Accepts]: Start accepts. Automaton has 200521 states and 207315 transitions. Word has length 1220 [2018-10-26 21:31:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:31:20,499 INFO L481 AbstractCegarLoop]: Abstraction has 200521 states and 207315 transitions. [2018-10-26 21:31:20,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:31:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 200521 states and 207315 transitions. [2018-10-26 21:31:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1418 [2018-10-26 21:31:20,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:31:20,599 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:31:20,600 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:31:20,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:31:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash 138000160, now seen corresponding path program 1 times [2018-10-26 21:31:20,600 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:31:20,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:31:20,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:20,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:31:20,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-26 21:31:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1557 backedges. 542 proven. 411 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2018-10-26 21:31:30,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:31:30,593 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 [2018-10-26 21:31:30,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:31:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:31:30,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:31:31,043 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-26 21:31:31,244 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:31:31,245 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 21:31:31,249 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 21:31:31,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:31:31 BoogieIcfgContainer [2018-10-26 21:31:31,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:31:31,250 INFO L168 Benchmark]: Toolchain (without parser) took 228978.70 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-26 21:31:31,252 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. [2018-10-26 21:31:31,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2473.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. [2018-10-26 21:31:31,256 INFO L168 Benchmark]: Boogie Procedure Inliner took 809.50 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 825.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2018-10-26 21:31:31,258 INFO L168 Benchmark]: Boogie Preprocessor took 533.77 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 70.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 7.1 GB. [2018-10-26 21:31:31,259 INFO L168 Benchmark]: RCFGBuilder took 14614.40 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 234.9 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 22.9 MB). Peak memory consumption was 607.7 MB. Max. memory is 7.1 GB. [2018-10-26 21:31:31,260 INFO L168 Benchmark]: TraceAbstraction took 210540.18 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.0 GB). Free memory was 2.1 GB in the beginning and 2.8 GB in the end (delta: -714.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-26 21:31:31,267 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 2473.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 809.50 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 825.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 533.77 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 70.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14614.40 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 234.9 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 22.9 MB). Peak memory consumption was 607.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210540.18 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.0 GB). Free memory was 2.1 GB in the beginning and 2.8 GB in the end (delta: -714.1 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: 180]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 180). Cancelled while BasicCegarLoop was analyzing trace of length 1418 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 10 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 210.4s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 171.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 11968 SDtfs, 29312 SDslu, 3292 SDs, 0 SdLazy, 61808 SolverSat, 14600 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 143.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 549 GetRequests, 512 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=200521occurred in iteration=14, 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: 13.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 51706 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 7972 NumberOfCodeBlocks, 7972 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 7956 ConstructedInterpolants, 0 QuantifiedInterpolants, 10006520 SizeOfPredicates, 0 NumberOfNonLiveVariables, 678 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 7977/8047 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown