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/Problem03_label52_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 17:13:55,181 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 17:13:55,186 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 17:13:55,206 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 17:13:55,206 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 17:13:55,208 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 17:13:55,211 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 17:13:55,212 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 17:13:55,214 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 17:13:55,215 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 17:13:55,216 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 17:13:55,216 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 17:13:55,217 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 17:13:55,218 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 17:13:55,219 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 17:13:55,220 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 17:13:55,221 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 17:13:55,222 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 17:13:55,225 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 17:13:55,226 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 17:13:55,227 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 17:13:55,229 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 17:13:55,231 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 17:13:55,231 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 17:13:55,232 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 17:13:55,236 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 17:13:55,237 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 17:13:55,238 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 17:13:55,243 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 17:13:55,244 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 17:13:55,245 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 17:13:55,245 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 17:13:55,246 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 17:13:55,246 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 17:13:55,248 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 17:13:55,249 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 17:13:55,250 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 [2018-10-23 17:13:55,270 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 17:13:55,270 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 17:13:55,271 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 17:13:55,272 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 17:13:55,272 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 17:13:55,272 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 17:13:55,272 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 17:13:55,273 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 17:13:55,273 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 17:13:55,273 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 17:13:55,273 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 17:13:55,273 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 17:13:55,274 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 17:13:55,274 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 17:13:55,274 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 17:13:55,274 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 17:13:55,274 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 17:13:55,275 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 17:13:55,275 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 17:13:55,275 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 17:13:55,275 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 17:13:55,275 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 17:13:55,276 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 17:13:55,276 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 17:13:55,276 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 17:13:55,276 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 17:13:55,276 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 17:13:55,276 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 17:13:55,328 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 17:13:55,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 17:13:55,344 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 17:13:55,345 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 17:13:55,346 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 17:13:55,347 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label52_false-unreach-call.c [2018-10-23 17:13:55,415 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2ff61570b/f372166376894d9789b7b07933be8486/FLAG12d4eabab [2018-10-23 17:13:56,077 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 17:13:56,081 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label52_false-unreach-call.c [2018-10-23 17:13:56,106 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2ff61570b/f372166376894d9789b7b07933be8486/FLAG12d4eabab [2018-10-23 17:13:56,126 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2ff61570b/f372166376894d9789b7b07933be8486 [2018-10-23 17:13:56,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 17:13:56,141 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 17:13:56,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 17:13:56,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 17:13:56,148 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 17:13:56,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:13:56" (1/1) ... [2018-10-23 17:13:56,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bedfbfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:56, skipping insertion in model container [2018-10-23 17:13:56,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:13:56" (1/1) ... [2018-10-23 17:13:56,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 17:13:56,248 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 17:13:56,895 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:13:56,902 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 17:13:57,204 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:13:57,227 INFO L193 MainTranslator]: Completed translation [2018-10-23 17:13:57,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57 WrapperNode [2018-10-23 17:13:57,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 17:13:57,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 17:13:57,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 17:13:57,230 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 17:13:57,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 17:13:57,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 17:13:57,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 17:13:57,523 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 17:13:57,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (1/1) ... [2018-10-23 17:13:57,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 17:13:57,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 17:13:57,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 17:13:57,668 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 17:13:57,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (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 [2018-10-23 17:13:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 17:13:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 17:13:57,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 17:14:03,221 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 17:14:03,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:14:03 BoogieIcfgContainer [2018-10-23 17:14:03,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 17:14:03,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 17:14:03,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 17:14:03,229 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 17:14:03,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:13:56" (1/3) ... [2018-10-23 17:14:03,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721fb068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:14:03, skipping insertion in model container [2018-10-23 17:14:03,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:13:57" (2/3) ... [2018-10-23 17:14:03,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721fb068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:14:03, skipping insertion in model container [2018-10-23 17:14:03,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:14:03" (3/3) ... [2018-10-23 17:14:03,233 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label52_false-unreach-call.c [2018-10-23 17:14:03,245 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 17:14:03,258 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 17:14:03,278 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 17:14:03,319 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 17:14:03,320 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 17:14:03,321 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 17:14:03,321 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 17:14:03,321 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 17:14:03,321 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 17:14:03,322 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 17:14:03,322 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 17:14:03,322 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 17:14:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-23 17:14:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-23 17:14:03,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:03,367 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:03,370 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:03,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1230754550, now seen corresponding path program 1 times [2018-10-23 17:14:03,377 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:03,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:03,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:03,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:03,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:04,229 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 17:14:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:14:04,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:04,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:04,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:04,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:04,322 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-23 17:14:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:07,866 INFO L93 Difference]: Finished difference Result 1075 states and 1921 transitions. [2018-10-23 17:14:07,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:14:07,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2018-10-23 17:14:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:07,900 INFO L225 Difference]: With dead ends: 1075 [2018-10-23 17:14:07,900 INFO L226 Difference]: Without dead ends: 765 [2018-10-23 17:14:07,909 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 [2018-10-23 17:14:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2018-10-23 17:14:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 520. [2018-10-23 17:14:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-10-23 17:14:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 853 transitions. [2018-10-23 17:14:08,134 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 853 transitions. Word has length 147 [2018-10-23 17:14:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:08,135 INFO L481 AbstractCegarLoop]: Abstraction has 520 states and 853 transitions. [2018-10-23 17:14:08,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 853 transitions. [2018-10-23 17:14:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-23 17:14:08,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:08,143 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 17:14:08,144 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:08,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1234692011, now seen corresponding path program 1 times [2018-10-23 17:14:08,144 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:08,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:08,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:08,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:08,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:14:08,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:08,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 17:14:08,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:14:08,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:14:08,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:08,300 INFO L87 Difference]: Start difference. First operand 520 states and 853 transitions. Second operand 3 states. [2018-10-23 17:14:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:10,423 INFO L93 Difference]: Finished difference Result 1465 states and 2463 transitions. [2018-10-23 17:14:10,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:10,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2018-10-23 17:14:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:10,429 INFO L225 Difference]: With dead ends: 1465 [2018-10-23 17:14:10,430 INFO L226 Difference]: Without dead ends: 947 [2018-10-23 17:14:10,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2018-10-23 17:14:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 931. [2018-10-23 17:14:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 931 states. [2018-10-23 17:14:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1508 transitions. [2018-10-23 17:14:10,481 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1508 transitions. Word has length 156 [2018-10-23 17:14:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:10,481 INFO L481 AbstractCegarLoop]: Abstraction has 931 states and 1508 transitions. [2018-10-23 17:14:10,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:14:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1508 transitions. [2018-10-23 17:14:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-23 17:14:10,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:10,490 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:10,491 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:10,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1185847465, now seen corresponding path program 1 times [2018-10-23 17:14:10,492 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:10,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:10,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:10,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:10,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 17:14:10,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:10,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:10,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:14:10,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:14:10,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:10,812 INFO L87 Difference]: Start difference. First operand 931 states and 1508 transitions. Second operand 3 states. [2018-10-23 17:14:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:13,317 INFO L93 Difference]: Finished difference Result 2693 states and 4423 transitions. [2018-10-23 17:14:13,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:13,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2018-10-23 17:14:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:13,330 INFO L225 Difference]: With dead ends: 2693 [2018-10-23 17:14:13,330 INFO L226 Difference]: Without dead ends: 1764 [2018-10-23 17:14:13,333 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 [2018-10-23 17:14:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2018-10-23 17:14:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1748. [2018-10-23 17:14:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2018-10-23 17:14:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2752 transitions. [2018-10-23 17:14:13,373 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2752 transitions. Word has length 164 [2018-10-23 17:14:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:13,374 INFO L481 AbstractCegarLoop]: Abstraction has 1748 states and 2752 transitions. [2018-10-23 17:14:13,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:14:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2752 transitions. [2018-10-23 17:14:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-23 17:14:13,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:13,379 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2018-10-23 17:14:13,379 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:13,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2112083193, now seen corresponding path program 1 times [2018-10-23 17:14:13,380 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:13,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:13,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:13,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:13,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 17:14:13,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:13,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:13,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:14:13,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:14:13,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:13,502 INFO L87 Difference]: Start difference. First operand 1748 states and 2752 transitions. Second operand 3 states. [2018-10-23 17:14:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:14,972 INFO L93 Difference]: Finished difference Result 5132 states and 8130 transitions. [2018-10-23 17:14:14,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:14,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2018-10-23 17:14:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:14,992 INFO L225 Difference]: With dead ends: 5132 [2018-10-23 17:14:14,992 INFO L226 Difference]: Without dead ends: 3386 [2018-10-23 17:14:14,996 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 [2018-10-23 17:14:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2018-10-23 17:14:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3385. [2018-10-23 17:14:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3385 states. [2018-10-23 17:14:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 4962 transitions. [2018-10-23 17:14:15,078 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 4962 transitions. Word has length 171 [2018-10-23 17:14:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:15,078 INFO L481 AbstractCegarLoop]: Abstraction has 3385 states and 4962 transitions. [2018-10-23 17:14:15,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:14:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 4962 transitions. [2018-10-23 17:14:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-23 17:14:15,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:15,087 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 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] [2018-10-23 17:14:15,087 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:15,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:15,088 INFO L82 PathProgramCache]: Analyzing trace with hash -523340993, now seen corresponding path program 1 times [2018-10-23 17:14:15,088 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:15,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:15,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:15,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:15,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-23 17:14:15,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:15,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:15,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:14:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:14:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:15,305 INFO L87 Difference]: Start difference. First operand 3385 states and 4962 transitions. Second operand 3 states. [2018-10-23 17:14:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:16,629 INFO L93 Difference]: Finished difference Result 10035 states and 14750 transitions. [2018-10-23 17:14:16,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:16,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2018-10-23 17:14:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:16,659 INFO L225 Difference]: With dead ends: 10035 [2018-10-23 17:14:16,659 INFO L226 Difference]: Without dead ends: 6652 [2018-10-23 17:14:16,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2018-10-23 17:14:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 6649. [2018-10-23 17:14:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6649 states. [2018-10-23 17:14:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 8832 transitions. [2018-10-23 17:14:16,794 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 8832 transitions. Word has length 178 [2018-10-23 17:14:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:16,795 INFO L481 AbstractCegarLoop]: Abstraction has 6649 states and 8832 transitions. [2018-10-23 17:14:16,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:14:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 8832 transitions. [2018-10-23 17:14:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-23 17:14:16,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:16,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:16,807 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:16,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1766388695, now seen corresponding path program 1 times [2018-10-23 17:14:16,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:16,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:16,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:16,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:16,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:14:17,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:17,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:17,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:17,074 INFO L87 Difference]: Start difference. First operand 6649 states and 8832 transitions. Second operand 4 states. [2018-10-23 17:14:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:19,473 INFO L93 Difference]: Finished difference Result 13297 states and 17664 transitions. [2018-10-23 17:14:19,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:19,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2018-10-23 17:14:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:19,499 INFO L225 Difference]: With dead ends: 13297 [2018-10-23 17:14:19,499 INFO L226 Difference]: Without dead ends: 6650 [2018-10-23 17:14:19,509 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 [2018-10-23 17:14:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2018-10-23 17:14:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 6649. [2018-10-23 17:14:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6649 states. [2018-10-23 17:14:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 8345 transitions. [2018-10-23 17:14:19,634 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 8345 transitions. Word has length 178 [2018-10-23 17:14:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:19,634 INFO L481 AbstractCegarLoop]: Abstraction has 6649 states and 8345 transitions. [2018-10-23 17:14:19,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 8345 transitions. [2018-10-23 17:14:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-23 17:14:19,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:19,647 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 3, 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] [2018-10-23 17:14:19,648 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:19,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1489058431, now seen corresponding path program 1 times [2018-10-23 17:14:19,648 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:19,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:19,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:19,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:19,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-23 17:14:19,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:19,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 17:14:19,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:14:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:14:19,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:19,788 INFO L87 Difference]: Start difference. First operand 6649 states and 8345 transitions. Second operand 3 states. [2018-10-23 17:14:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:20,731 INFO L93 Difference]: Finished difference Result 13264 states and 16645 transitions. [2018-10-23 17:14:20,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:20,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 199 [2018-10-23 17:14:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:20,760 INFO L225 Difference]: With dead ends: 13264 [2018-10-23 17:14:20,760 INFO L226 Difference]: Without dead ends: 6617 [2018-10-23 17:14:20,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2018-10-23 17:14:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 6617. [2018-10-23 17:14:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6617 states. [2018-10-23 17:14:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6617 states to 6617 states and 8118 transitions. [2018-10-23 17:14:20,872 INFO L78 Accepts]: Start accepts. Automaton has 6617 states and 8118 transitions. Word has length 199 [2018-10-23 17:14:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:20,872 INFO L481 AbstractCegarLoop]: Abstraction has 6617 states and 8118 transitions. [2018-10-23 17:14:20,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:14:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 6617 states and 8118 transitions. [2018-10-23 17:14:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-23 17:14:20,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:20,884 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:20,885 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:20,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1436689474, now seen corresponding path program 1 times [2018-10-23 17:14:20,885 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:20,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:20,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:20,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:20,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 17:14:21,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:21,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:21,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:14:21,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:14:21,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:21,027 INFO L87 Difference]: Start difference. First operand 6617 states and 8118 transitions. Second operand 3 states. [2018-10-23 17:14:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:22,462 INFO L93 Difference]: Finished difference Result 15882 states and 19789 transitions. [2018-10-23 17:14:22,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:22,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-10-23 17:14:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:22,484 INFO L225 Difference]: With dead ends: 15882 [2018-10-23 17:14:22,484 INFO L226 Difference]: Without dead ends: 9267 [2018-10-23 17:14:22,491 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 [2018-10-23 17:14:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2018-10-23 17:14:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 9267. [2018-10-23 17:14:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9267 states. [2018-10-23 17:14:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 10892 transitions. [2018-10-23 17:14:22,627 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 10892 transitions. Word has length 203 [2018-10-23 17:14:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:22,627 INFO L481 AbstractCegarLoop]: Abstraction has 9267 states and 10892 transitions. [2018-10-23 17:14:22,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:14:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 10892 transitions. [2018-10-23 17:14:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-23 17:14:22,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:22,644 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:22,645 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:22,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash 509530604, now seen corresponding path program 1 times [2018-10-23 17:14:22,645 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:22,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:22,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:22,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:22,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-23 17:14:22,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:22,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:22,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:22,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:22,862 INFO L87 Difference]: Start difference. First operand 9267 states and 10892 transitions. Second operand 4 states. [2018-10-23 17:14:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:24,507 INFO L93 Difference]: Finished difference Result 26491 states and 31042 transitions. [2018-10-23 17:14:24,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:14:24,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2018-10-23 17:14:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:24,540 INFO L225 Difference]: With dead ends: 26491 [2018-10-23 17:14:24,541 INFO L226 Difference]: Without dead ends: 17226 [2018-10-23 17:14:24,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2018-10-23 17:14:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 17225. [2018-10-23 17:14:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17225 states. [2018-10-23 17:14:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17225 states to 17225 states and 19594 transitions. [2018-10-23 17:14:24,768 INFO L78 Accepts]: Start accepts. Automaton has 17225 states and 19594 transitions. Word has length 237 [2018-10-23 17:14:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:24,768 INFO L481 AbstractCegarLoop]: Abstraction has 17225 states and 19594 transitions. [2018-10-23 17:14:24,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 17225 states and 19594 transitions. [2018-10-23 17:14:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-23 17:14:24,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:24,790 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:24,790 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:24,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:24,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1908293036, now seen corresponding path program 1 times [2018-10-23 17:14:24,791 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:24,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:24,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:24,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:24,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-10-23 17:14:25,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:25,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:25,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:25,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:25,160 INFO L87 Difference]: Start difference. First operand 17225 states and 19594 transitions. Second operand 4 states. [2018-10-23 17:14:26,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:26,864 INFO L93 Difference]: Finished difference Result 34456 states and 39200 transitions. [2018-10-23 17:14:26,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:26,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2018-10-23 17:14:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:26,900 INFO L225 Difference]: With dead ends: 34456 [2018-10-23 17:14:26,900 INFO L226 Difference]: Without dead ends: 17233 [2018-10-23 17:14:26,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17233 states. [2018-10-23 17:14:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17233 to 17225. [2018-10-23 17:14:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17225 states. [2018-10-23 17:14:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17225 states to 17225 states and 19392 transitions. [2018-10-23 17:14:27,340 INFO L78 Accepts]: Start accepts. Automaton has 17225 states and 19392 transitions. Word has length 237 [2018-10-23 17:14:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:27,341 INFO L481 AbstractCegarLoop]: Abstraction has 17225 states and 19392 transitions. [2018-10-23 17:14:27,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 17225 states and 19392 transitions. [2018-10-23 17:14:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-23 17:14:27,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:27,367 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:27,367 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:27,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:27,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1920226467, now seen corresponding path program 1 times [2018-10-23 17:14:27,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:27,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:27,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:27,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:27,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 17:14:27,725 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:27,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:27,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:27,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:27,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:27,727 INFO L87 Difference]: Start difference. First operand 17225 states and 19392 transitions. Second operand 4 states. [2018-10-23 17:14:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:29,743 INFO L93 Difference]: Finished difference Result 35683 states and 40218 transitions. [2018-10-23 17:14:29,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:14:29,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 258 [2018-10-23 17:14:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:29,773 INFO L225 Difference]: With dead ends: 35683 [2018-10-23 17:14:29,773 INFO L226 Difference]: Without dead ends: 18460 [2018-10-23 17:14:29,788 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 [2018-10-23 17:14:29,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18460 states. [2018-10-23 17:14:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18460 to 18452. [2018-10-23 17:14:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18452 states. [2018-10-23 17:14:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18452 states to 18452 states and 20733 transitions. [2018-10-23 17:14:29,981 INFO L78 Accepts]: Start accepts. Automaton has 18452 states and 20733 transitions. Word has length 258 [2018-10-23 17:14:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:29,981 INFO L481 AbstractCegarLoop]: Abstraction has 18452 states and 20733 transitions. [2018-10-23 17:14:29,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18452 states and 20733 transitions. [2018-10-23 17:14:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-23 17:14:30,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:30,005 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 17:14:30,005 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:30,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:30,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1626643177, now seen corresponding path program 1 times [2018-10-23 17:14:30,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:30,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:30,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:30,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:30,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-10-23 17:14:30,196 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:30,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 17:14:30,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:14:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:14:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:30,198 INFO L87 Difference]: Start difference. First operand 18452 states and 20733 transitions. Second operand 3 states. [2018-10-23 17:14:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:31,605 INFO L93 Difference]: Finished difference Result 46744 states and 52382 transitions. [2018-10-23 17:14:31,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:14:31,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 264 [2018-10-23 17:14:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:31,648 INFO L225 Difference]: With dead ends: 46744 [2018-10-23 17:14:31,649 INFO L226 Difference]: Without dead ends: 28294 [2018-10-23 17:14:31,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:14:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28294 states. [2018-10-23 17:14:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28294 to 28290. [2018-10-23 17:14:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28290 states. [2018-10-23 17:14:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28290 states to 28290 states and 31586 transitions. [2018-10-23 17:14:32,010 INFO L78 Accepts]: Start accepts. Automaton has 28290 states and 31586 transitions. Word has length 264 [2018-10-23 17:14:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:32,010 INFO L481 AbstractCegarLoop]: Abstraction has 28290 states and 31586 transitions. [2018-10-23 17:14:32,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:14:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 28290 states and 31586 transitions. [2018-10-23 17:14:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-10-23 17:14:32,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:32,044 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:14:32,044 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:32,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash 444707523, now seen corresponding path program 1 times [2018-10-23 17:14:32,045 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:32,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:32,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:32,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:32,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:32,416 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 17:14:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-10-23 17:14:32,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:14:32,710 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 [2018-10-23 17:14:32,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:32,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:14:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-23 17:14:33,045 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:14:33,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 17:14:33,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 17:14:33,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 17:14:33,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-23 17:14:33,047 INFO L87 Difference]: Start difference. First operand 28290 states and 31586 transitions. Second operand 6 states. [2018-10-23 17:14:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:39,738 INFO L93 Difference]: Finished difference Result 93858 states and 105362 transitions. [2018-10-23 17:14:39,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 17:14:39,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 272 [2018-10-23 17:14:39,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:39,839 INFO L225 Difference]: With dead ends: 93858 [2018-10-23 17:14:39,840 INFO L226 Difference]: Without dead ends: 65570 [2018-10-23 17:14:39,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-23 17:14:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65570 states. [2018-10-23 17:14:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65570 to 63317. [2018-10-23 17:14:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63317 states. [2018-10-23 17:14:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63317 states to 63317 states and 69195 transitions. [2018-10-23 17:14:41,330 INFO L78 Accepts]: Start accepts. Automaton has 63317 states and 69195 transitions. Word has length 272 [2018-10-23 17:14:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:41,330 INFO L481 AbstractCegarLoop]: Abstraction has 63317 states and 69195 transitions. [2018-10-23 17:14:41,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 17:14:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 63317 states and 69195 transitions. [2018-10-23 17:14:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-10-23 17:14:41,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:41,368 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 17:14:41,368 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:41,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:41,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1103085655, now seen corresponding path program 1 times [2018-10-23 17:14:41,369 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:41,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:41,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:41,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:41,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-23 17:14:41,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:14:41,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:14:41,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:14:41,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:14:41,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:41,981 INFO L87 Difference]: Start difference. First operand 63317 states and 69195 transitions. Second operand 4 states. [2018-10-23 17:14:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:14:44,938 INFO L93 Difference]: Finished difference Result 232583 states and 254468 transitions. [2018-10-23 17:14:44,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:14:44,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 356 [2018-10-23 17:14:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:14:45,180 INFO L225 Difference]: With dead ends: 232583 [2018-10-23 17:14:45,181 INFO L226 Difference]: Without dead ends: 169268 [2018-10-23 17:14:45,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:14:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169268 states. [2018-10-23 17:14:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169268 to 107588. [2018-10-23 17:14:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107588 states. [2018-10-23 17:14:47,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107588 states to 107588 states and 117801 transitions. [2018-10-23 17:14:47,602 INFO L78 Accepts]: Start accepts. Automaton has 107588 states and 117801 transitions. Word has length 356 [2018-10-23 17:14:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:14:47,602 INFO L481 AbstractCegarLoop]: Abstraction has 107588 states and 117801 transitions. [2018-10-23 17:14:47,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:14:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 107588 states and 117801 transitions. [2018-10-23 17:14:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-10-23 17:14:47,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:14:47,638 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 17:14:47,638 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:14:47,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:14:47,639 INFO L82 PathProgramCache]: Analyzing trace with hash 543932143, now seen corresponding path program 1 times [2018-10-23 17:14:47,639 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:14:47,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:14:47,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:47,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:47,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:14:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:48,333 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 17:14:49,114 WARN L179 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2018-10-23 17:14:49,404 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2018-10-23 17:14:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 283 proven. 128 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 17:14:49,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:14:49,842 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 [2018-10-23 17:14:49,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:14:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:14:50,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:14:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-10-23 17:14:50,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:14:50,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2018-10-23 17:14:50,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 17:14:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 17:14:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-23 17:14:50,395 INFO L87 Difference]: Start difference. First operand 107588 states and 117801 transitions. Second operand 10 states. [2018-10-23 17:14:50,670 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2018-10-23 17:14:51,096 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2018-10-23 17:15:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:15:02,847 INFO L93 Difference]: Finished difference Result 329517 states and 360909 transitions. [2018-10-23 17:15:02,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 17:15:02,847 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 370 [2018-10-23 17:15:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:15:03,090 INFO L225 Difference]: With dead ends: 329517 [2018-10-23 17:15:03,091 INFO L226 Difference]: Without dead ends: 211970 [2018-10-23 17:15:03,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2018-10-23 17:15:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211970 states. [2018-10-23 17:15:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211970 to 198751. [2018-10-23 17:15:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198751 states. [2018-10-23 17:15:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198751 states to 198751 states and 215924 transitions. [2018-10-23 17:15:06,376 INFO L78 Accepts]: Start accepts. Automaton has 198751 states and 215924 transitions. Word has length 370 [2018-10-23 17:15:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:15:06,377 INFO L481 AbstractCegarLoop]: Abstraction has 198751 states and 215924 transitions. [2018-10-23 17:15:06,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 17:15:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 198751 states and 215924 transitions. [2018-10-23 17:15:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-10-23 17:15:06,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:15:06,425 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 17:15:06,425 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:15:06,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:15:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1523962484, now seen corresponding path program 1 times [2018-10-23 17:15:06,426 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:15:06,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:15:06,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:06,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:06,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-23 17:15:06,968 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:15:06,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:15:06,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:15:06,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:15:06,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:15:06,969 INFO L87 Difference]: Start difference. First operand 198751 states and 215924 transitions. Second operand 4 states. [2018-10-23 17:15:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:15:11,726 INFO L93 Difference]: Finished difference Result 542357 states and 590457 transitions. [2018-10-23 17:15:11,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:15:11,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 378 [2018-10-23 17:15:11,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:15:12,212 INFO L225 Difference]: With dead ends: 542357 [2018-10-23 17:15:12,212 INFO L226 Difference]: Without dead ends: 378218 [2018-10-23 17:15:12,324 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 [2018-10-23 17:15:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378218 states. [2018-10-23 17:15:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378218 to 378009. [2018-10-23 17:15:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378009 states. [2018-10-23 17:15:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378009 states to 378009 states and 410604 transitions. [2018-10-23 17:15:25,470 INFO L78 Accepts]: Start accepts. Automaton has 378009 states and 410604 transitions. Word has length 378 [2018-10-23 17:15:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:15:25,470 INFO L481 AbstractCegarLoop]: Abstraction has 378009 states and 410604 transitions. [2018-10-23 17:15:25,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:15:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 378009 states and 410604 transitions. [2018-10-23 17:15:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-10-23 17:15:25,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:15:25,521 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 17:15:25,521 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:15:25,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:15:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1391412688, now seen corresponding path program 1 times [2018-10-23 17:15:25,522 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:15:25,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:15:25,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:25,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:25,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-23 17:15:26,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:15:26,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:15:26,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:15:26,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:15:26,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:15:26,056 INFO L87 Difference]: Start difference. First operand 378009 states and 410604 transitions. Second operand 4 states. [2018-10-23 17:15:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:15:32,026 INFO L93 Difference]: Finished difference Result 924963 states and 1004993 transitions. [2018-10-23 17:15:32,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:15:32,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 380 [2018-10-23 17:15:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:15:32,669 INFO L225 Difference]: With dead ends: 924963 [2018-10-23 17:15:32,670 INFO L226 Difference]: Without dead ends: 546956 [2018-10-23 17:15:32,855 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 [2018-10-23 17:15:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546956 states. [2018-10-23 17:15:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546956 to 531174. [2018-10-23 17:15:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531174 states. [2018-10-23 17:15:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531174 states to 531174 states and 571799 transitions. [2018-10-23 17:15:41,776 INFO L78 Accepts]: Start accepts. Automaton has 531174 states and 571799 transitions. Word has length 380 [2018-10-23 17:15:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:15:41,776 INFO L481 AbstractCegarLoop]: Abstraction has 531174 states and 571799 transitions. [2018-10-23 17:15:41,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:15:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 531174 states and 571799 transitions. [2018-10-23 17:15:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-10-23 17:15:41,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:15:41,826 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:15:41,826 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:15:41,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:15:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 877687789, now seen corresponding path program 1 times [2018-10-23 17:15:41,826 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:15:41,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:15:41,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:41,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:41,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:15:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:42,284 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 17:15:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 346 proven. 29 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-23 17:15:44,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:15:44,171 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 [2018-10-23 17:15:44,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:15:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:15:44,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:15:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 265 proven. 124 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-23 17:15:44,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:15:44,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3] total 11 [2018-10-23 17:15:44,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 17:15:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 17:15:44,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-23 17:15:44,900 INFO L87 Difference]: Start difference. First operand 531174 states and 571799 transitions. Second operand 12 states. [2018-10-23 17:15:45,225 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-23 17:16:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:16:24,271 INFO L93 Difference]: Finished difference Result 3351086 states and 3606369 transitions. [2018-10-23 17:16:24,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-23 17:16:24,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 415 [2018-10-23 17:16:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:16:29,322 INFO L225 Difference]: With dead ends: 3351086 [2018-10-23 17:16:29,322 INFO L226 Difference]: Without dead ends: 2819898 [2018-10-23 17:16:29,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 413 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 17:16:32,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819898 states. Received shutdown request...