java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label29_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:48:44,169 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:48:44,171 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:48:44,186 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:48:44,187 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:48:44,188 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:48:44,189 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:48:44,191 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:48:44,192 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:48:44,193 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:48:44,194 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:48:44,195 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:48:44,196 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:48:44,197 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:48:44,198 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:48:44,199 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:48:44,199 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:48:44,201 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:48:44,203 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:48:44,205 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:48:44,206 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:48:44,208 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:48:44,210 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:48:44,210 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:48:44,211 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:48:44,212 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:48:44,213 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:48:44,214 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:48:44,214 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:48:44,215 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:48:44,216 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:48:44,216 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 16:48:44,219 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:48:44,239 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:48:44,240 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:48:44,240 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:48:44,241 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:48:44,241 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:48:44,241 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:48:44,242 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:48:44,242 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:48:44,242 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:48:44,242 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:48:44,242 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:48:44,243 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:48:44,243 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:48:44,243 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:48:44,243 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:48:44,243 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:48:44,244 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:48:44,244 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:48:44,244 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:48:44,244 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:48:44,244 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:48:44,244 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:48:44,245 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:48:44,245 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:48:44,245 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:48:44,245 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:48:44,245 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:48:44,246 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:48:44,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:48:44,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:48:44,310 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:48:44,312 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:48:44,312 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:48:44,313 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label29_true-unreach-call.c [2018-10-24 16:48:44,385 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/25bc004f1/6cde5016571b4d8cb2292b7c2ccc8955/FLAGbf3c161ae [2018-10-24 16:48:45,109 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:48:45,110 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label29_true-unreach-call.c [2018-10-24 16:48:45,138 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/25bc004f1/6cde5016571b4d8cb2292b7c2ccc8955/FLAGbf3c161ae [2018-10-24 16:48:45,153 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/25bc004f1/6cde5016571b4d8cb2292b7c2ccc8955 [2018-10-24 16:48:45,162 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:48:45,164 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:48:45,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:48:45,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:48:45,169 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:48:45,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:48:45" (1/1) ... [2018-10-24 16:48:45,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a20ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:45, skipping insertion in model container [2018-10-24 16:48:45,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:48:45" (1/1) ... [2018-10-24 16:48:45,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:48:45,297 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:48:46,321 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:48:46,329 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:48:46,701 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:48:46,724 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:48:46,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46 WrapperNode [2018-10-24 16:48:46,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:48:46,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:48:46,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:48:46,726 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:48:46,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:46,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:47,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:48:47,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:48:47,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:48:47,227 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:48:47,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:47,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:47,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:47,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:47,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:47,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:47,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... [2018-10-24 16:48:47,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:48:47,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:48:47,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:48:47,527 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:48:47,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:48:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:48:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:48:47,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:48:59,012 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:48:59,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:48:59 BoogieIcfgContainer [2018-10-24 16:48:59,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:48:59,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:48:59,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:48:59,018 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:48:59,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:48:45" (1/3) ... [2018-10-24 16:48:59,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e67d5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:48:59, skipping insertion in model container [2018-10-24 16:48:59,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:46" (2/3) ... [2018-10-24 16:48:59,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e67d5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:48:59, skipping insertion in model container [2018-10-24 16:48:59,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:48:59" (3/3) ... [2018-10-24 16:48:59,022 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label29_true-unreach-call.c [2018-10-24 16:48:59,032 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:48:59,041 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:48:59,059 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:48:59,100 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:48:59,101 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:48:59,102 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:48:59,102 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:48:59,102 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:48:59,102 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:48:59,102 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:48:59,102 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:48:59,103 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:48:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2018-10-24 16:48:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-24 16:48:59,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:48:59,151 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] [2018-10-24 16:48:59,153 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:48:59,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:48:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash -717159398, now seen corresponding path program 1 times [2018-10-24 16:48:59,161 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:48:59,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:48:59,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:48:59,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:48:59,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:48:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:48:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:48:59,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:48:59,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:48:59,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:48:59,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:48:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:48:59,700 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 4 states. [2018-10-24 16:49:09,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:09,844 INFO L93 Difference]: Finished difference Result 2126 states and 3956 transitions. [2018-10-24 16:49:09,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:49:09,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2018-10-24 16:49:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:09,882 INFO L225 Difference]: With dead ends: 2126 [2018-10-24 16:49:09,882 INFO L226 Difference]: Without dead ends: 1528 [2018-10-24 16:49:09,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:09,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2018-10-24 16:49:10,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1048. [2018-10-24 16:49:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-10-24 16:49:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1826 transitions. [2018-10-24 16:49:10,025 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1826 transitions. Word has length 66 [2018-10-24 16:49:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:10,025 INFO L481 AbstractCegarLoop]: Abstraction has 1048 states and 1826 transitions. [2018-10-24 16:49:10,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:49:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1826 transitions. [2018-10-24 16:49:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-24 16:49:10,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:10,032 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:49:10,033 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:10,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1060600664, now seen corresponding path program 1 times [2018-10-24 16:49:10,033 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:10,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:10,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:10,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:10,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:49:10,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:49:10,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:49:10,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:49:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:49:10,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:10,432 INFO L87 Difference]: Start difference. First operand 1048 states and 1826 transitions. Second operand 4 states. [2018-10-24 16:49:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:22,729 INFO L93 Difference]: Finished difference Result 3810 states and 6822 transitions. [2018-10-24 16:49:22,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:49:22,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2018-10-24 16:49:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:22,747 INFO L225 Difference]: With dead ends: 3810 [2018-10-24 16:49:22,747 INFO L226 Difference]: Without dead ends: 2764 [2018-10-24 16:49:22,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2018-10-24 16:49:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2018-10-24 16:49:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2764 states. [2018-10-24 16:49:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 4043 transitions. [2018-10-24 16:49:22,816 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 4043 transitions. Word has length 138 [2018-10-24 16:49:22,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:22,817 INFO L481 AbstractCegarLoop]: Abstraction has 2764 states and 4043 transitions. [2018-10-24 16:49:22,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:49:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 4043 transitions. [2018-10-24 16:49:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-24 16:49:22,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:22,823 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:49:22,824 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:22,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1047340248, now seen corresponding path program 1 times [2018-10-24 16:49:22,824 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:22,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:22,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:22,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:22,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-24 16:49:23,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:49:23,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:49:23,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:49:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:49:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:49:23,245 INFO L87 Difference]: Start difference. First operand 2764 states and 4043 transitions. Second operand 3 states. [2018-10-24 16:49:30,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:30,312 INFO L93 Difference]: Finished difference Result 8084 states and 11875 transitions. [2018-10-24 16:49:30,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:49:30,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2018-10-24 16:49:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:30,343 INFO L225 Difference]: With dead ends: 8084 [2018-10-24 16:49:30,343 INFO L226 Difference]: Without dead ends: 5322 [2018-10-24 16:49:30,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:49:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5322 states. [2018-10-24 16:49:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5322 to 5318. [2018-10-24 16:49:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5318 states. [2018-10-24 16:49:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 7187 transitions. [2018-10-24 16:49:30,468 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 7187 transitions. Word has length 222 [2018-10-24 16:49:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:30,469 INFO L481 AbstractCegarLoop]: Abstraction has 5318 states and 7187 transitions. [2018-10-24 16:49:30,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:49:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 7187 transitions. [2018-10-24 16:49:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-24 16:49:30,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:30,478 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:49:30,478 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:30,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:30,480 INFO L82 PathProgramCache]: Analyzing trace with hash 218809350, now seen corresponding path program 1 times [2018-10-24 16:49:30,480 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:30,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:30,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:30,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:30,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:49:30,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:49:30,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:49:30,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:49:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:49:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:30,984 INFO L87 Difference]: Start difference. First operand 5318 states and 7187 transitions. Second operand 4 states. [2018-10-24 16:49:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:35,922 INFO L93 Difference]: Finished difference Result 11486 states and 15622 transitions. [2018-10-24 16:49:35,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:49:35,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 229 [2018-10-24 16:49:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:35,952 INFO L225 Difference]: With dead ends: 11486 [2018-10-24 16:49:35,952 INFO L226 Difference]: Without dead ends: 6170 [2018-10-24 16:49:35,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6170 states. [2018-10-24 16:49:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 6170. [2018-10-24 16:49:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6170 states. [2018-10-24 16:49:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 7586 transitions. [2018-10-24 16:49:36,072 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 7586 transitions. Word has length 229 [2018-10-24 16:49:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:36,073 INFO L481 AbstractCegarLoop]: Abstraction has 6170 states and 7586 transitions. [2018-10-24 16:49:36,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:49:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 7586 transitions. [2018-10-24 16:49:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-10-24 16:49:36,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:36,079 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:49:36,080 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:36,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1329630146, now seen corresponding path program 1 times [2018-10-24 16:49:36,080 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:36,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:36,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:36,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:36,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 16:49:36,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:49:36,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:49:36,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:49:36,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:49:36,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:36,487 INFO L87 Difference]: Start difference. First operand 6170 states and 7586 transitions. Second operand 4 states. [2018-10-24 16:49:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:46,094 INFO L93 Difference]: Finished difference Result 16208 states and 19981 transitions. [2018-10-24 16:49:46,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:49:46,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 288 [2018-10-24 16:49:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:46,131 INFO L225 Difference]: With dead ends: 16208 [2018-10-24 16:49:46,132 INFO L226 Difference]: Without dead ends: 10040 [2018-10-24 16:49:46,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10040 states. [2018-10-24 16:49:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10040 to 8735. [2018-10-24 16:49:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8735 states. [2018-10-24 16:49:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8735 states to 8735 states and 10490 transitions. [2018-10-24 16:49:46,293 INFO L78 Accepts]: Start accepts. Automaton has 8735 states and 10490 transitions. Word has length 288 [2018-10-24 16:49:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:46,294 INFO L481 AbstractCegarLoop]: Abstraction has 8735 states and 10490 transitions. [2018-10-24 16:49:46,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:49:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8735 states and 10490 transitions. [2018-10-24 16:49:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-24 16:49:46,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:46,303 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:49:46,303 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:46,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:46,304 INFO L82 PathProgramCache]: Analyzing trace with hash -66304663, now seen corresponding path program 1 times [2018-10-24 16:49:46,304 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:46,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:46,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:46,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:46,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 268 proven. 71 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-24 16:49:46,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:49:46,946 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:49:46,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:47,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:49:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 268 proven. 71 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-24 16:49:47,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:49:47,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-24 16:49:47,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:49:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:49:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:49:47,476 INFO L87 Difference]: Start difference. First operand 8735 states and 10490 transitions. Second operand 5 states. [2018-10-24 16:49:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:59,346 INFO L93 Difference]: Finished difference Result 29860 states and 36119 transitions. [2018-10-24 16:49:59,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:49:59,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 293 [2018-10-24 16:49:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:59,396 INFO L225 Difference]: With dead ends: 29860 [2018-10-24 16:49:59,397 INFO L226 Difference]: Without dead ends: 17646 [2018-10-24 16:49:59,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 291 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:49:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17646 states. [2018-10-24 16:49:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17646 to 15936. [2018-10-24 16:49:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15936 states. [2018-10-24 16:49:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15936 states to 15936 states and 17797 transitions. [2018-10-24 16:49:59,684 INFO L78 Accepts]: Start accepts. Automaton has 15936 states and 17797 transitions. Word has length 293 [2018-10-24 16:49:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:59,685 INFO L481 AbstractCegarLoop]: Abstraction has 15936 states and 17797 transitions. [2018-10-24 16:49:59,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:49:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 15936 states and 17797 transitions. [2018-10-24 16:49:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2018-10-24 16:49:59,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:59,693 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:49:59,694 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:59,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash -82833536, now seen corresponding path program 1 times [2018-10-24 16:49:59,694 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:59,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:59,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:59,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:59,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:00,161 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-10-24 16:50:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-10-24 16:50:00,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:00,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:50:00,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:50:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:50:00,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:50:00,236 INFO L87 Difference]: Start difference. First operand 15936 states and 17797 transitions. Second operand 4 states. [2018-10-24 16:50:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:05,845 INFO L93 Difference]: Finished difference Result 42538 states and 47476 transitions. [2018-10-24 16:50:05,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:50:05,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2018-10-24 16:50:05,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:05,905 INFO L225 Difference]: With dead ends: 42538 [2018-10-24 16:50:05,906 INFO L226 Difference]: Without dead ends: 26176 [2018-10-24 16:50:05,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:50:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26176 states. [2018-10-24 16:50:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26176 to 15497. [2018-10-24 16:50:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15497 states. [2018-10-24 16:50:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15497 states to 15497 states and 17220 transitions. [2018-10-24 16:50:06,166 INFO L78 Accepts]: Start accepts. Automaton has 15497 states and 17220 transitions. Word has length 329 [2018-10-24 16:50:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:06,167 INFO L481 AbstractCegarLoop]: Abstraction has 15497 states and 17220 transitions. [2018-10-24 16:50:06,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:50:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 15497 states and 17220 transitions. [2018-10-24 16:50:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2018-10-24 16:50:06,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:06,182 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:50:06,182 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:06,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:06,182 INFO L82 PathProgramCache]: Analyzing trace with hash -306904469, now seen corresponding path program 1 times [2018-10-24 16:50:06,183 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:06,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:06,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:06,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:06,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-10-24 16:50:06,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:06,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:50:06,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:50:06,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:50:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:50:06,561 INFO L87 Difference]: Start difference. First operand 15497 states and 17220 transitions. Second operand 3 states. [2018-10-24 16:50:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:12,066 INFO L93 Difference]: Finished difference Result 41220 states and 45684 transitions. [2018-10-24 16:50:12,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:50:12,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 449 [2018-10-24 16:50:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:12,112 INFO L225 Difference]: With dead ends: 41220 [2018-10-24 16:50:12,112 INFO L226 Difference]: Without dead ends: 23127 [2018-10-24 16:50:12,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:50:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23127 states. [2018-10-24 16:50:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23127 to 21844. [2018-10-24 16:50:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21844 states. [2018-10-24 16:50:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21844 states to 21844 states and 23757 transitions. [2018-10-24 16:50:12,386 INFO L78 Accepts]: Start accepts. Automaton has 21844 states and 23757 transitions. Word has length 449 [2018-10-24 16:50:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:12,387 INFO L481 AbstractCegarLoop]: Abstraction has 21844 states and 23757 transitions. [2018-10-24 16:50:12,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:50:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 21844 states and 23757 transitions. [2018-10-24 16:50:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2018-10-24 16:50:12,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:12,441 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:50:12,441 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:12,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash 860846939, now seen corresponding path program 1 times [2018-10-24 16:50:12,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:12,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:12,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:12,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:12,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-10-24 16:50:13,252 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:13,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:50:13,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:50:13,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:50:13,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:50:13,254 INFO L87 Difference]: Start difference. First operand 21844 states and 23757 transitions. Second operand 3 states. [2018-10-24 16:50:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:17,983 INFO L93 Difference]: Finished difference Result 52637 states and 57284 transitions. [2018-10-24 16:50:17,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:50:17,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 770 [2018-10-24 16:50:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:18,017 INFO L225 Difference]: With dead ends: 52637 [2018-10-24 16:50:18,017 INFO L226 Difference]: Without dead ends: 31222 [2018-10-24 16:50:18,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:50:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31222 states. [2018-10-24 16:50:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31222 to 30792. [2018-10-24 16:50:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30792 states. [2018-10-24 16:50:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30792 states to 30792 states and 33225 transitions. [2018-10-24 16:50:18,386 INFO L78 Accepts]: Start accepts. Automaton has 30792 states and 33225 transitions. Word has length 770 [2018-10-24 16:50:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:18,387 INFO L481 AbstractCegarLoop]: Abstraction has 30792 states and 33225 transitions. [2018-10-24 16:50:18,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:50:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 30792 states and 33225 transitions. [2018-10-24 16:50:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2018-10-24 16:50:18,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:18,448 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:50:18,449 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:18,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:18,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1216152556, now seen corresponding path program 1 times [2018-10-24 16:50:18,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:18,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:18,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:18,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:18,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 621 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-10-24 16:50:19,724 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:19,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:50:19,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:50:19,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:50:19,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:50:19,726 INFO L87 Difference]: Start difference. First operand 30792 states and 33225 transitions. Second operand 3 states. [2018-10-24 16:50:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:22,227 INFO L93 Difference]: Finished difference Result 59870 states and 64617 transitions. [2018-10-24 16:50:22,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:50:22,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 825 [2018-10-24 16:50:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:22,255 INFO L225 Difference]: With dead ends: 59870 [2018-10-24 16:50:22,255 INFO L226 Difference]: Without dead ends: 29506 [2018-10-24 16:50:22,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:50:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29506 states. [2018-10-24 16:50:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29506 to 29505. [2018-10-24 16:50:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29505 states. [2018-10-24 16:50:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29505 states to 29505 states and 31815 transitions. [2018-10-24 16:50:22,574 INFO L78 Accepts]: Start accepts. Automaton has 29505 states and 31815 transitions. Word has length 825 [2018-10-24 16:50:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:22,576 INFO L481 AbstractCegarLoop]: Abstraction has 29505 states and 31815 transitions. [2018-10-24 16:50:22,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:50:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 29505 states and 31815 transitions. [2018-10-24 16:50:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2018-10-24 16:50:22,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:22,616 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:50:22,617 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:22,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash 999787075, now seen corresponding path program 1 times [2018-10-24 16:50:22,617 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:22,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:22,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:22,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:22,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:23,763 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 16:50:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 255 proven. 572 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 16:50:24,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:50:24,808 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:50:24,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:25,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:50:25,447 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 14 [2018-10-24 16:50:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 587 proven. 241 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-24 16:50:27,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:50:27,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-24 16:50:27,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:50:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:50:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:50:27,072 INFO L87 Difference]: Start difference. First operand 29505 states and 31815 transitions. Second operand 8 states. [2018-10-24 16:50:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:38,886 INFO L93 Difference]: Finished difference Result 67122 states and 72509 transitions. [2018-10-24 16:50:38,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 16:50:38,887 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 877 [2018-10-24 16:50:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:38,925 INFO L225 Difference]: With dead ends: 67122 [2018-10-24 16:50:38,925 INFO L226 Difference]: Without dead ends: 38046 [2018-10-24 16:50:38,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 875 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:50:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38046 states. [2018-10-24 16:50:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38046 to 29925. [2018-10-24 16:50:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29925 states. [2018-10-24 16:50:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29925 states to 29925 states and 32141 transitions. [2018-10-24 16:50:39,230 INFO L78 Accepts]: Start accepts. Automaton has 29925 states and 32141 transitions. Word has length 877 [2018-10-24 16:50:39,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:39,231 INFO L481 AbstractCegarLoop]: Abstraction has 29925 states and 32141 transitions. [2018-10-24 16:50:39,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:50:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 29925 states and 32141 transitions. [2018-10-24 16:50:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 910 [2018-10-24 16:50:39,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:39,252 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:50:39,252 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:39,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:39,252 INFO L82 PathProgramCache]: Analyzing trace with hash -234339243, now seen corresponding path program 1 times [2018-10-24 16:50:39,253 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:39,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:39,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:39,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:39,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 1128 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2018-10-24 16:50:40,395 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:40,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:50:40,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:50:40,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:50:40,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:50:40,398 INFO L87 Difference]: Start difference. First operand 29925 states and 32141 transitions. Second operand 5 states. [2018-10-24 16:50:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:49,976 INFO L93 Difference]: Finished difference Result 74363 states and 80043 transitions. [2018-10-24 16:50:49,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:50:49,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 909 [2018-10-24 16:50:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:50,018 INFO L225 Difference]: With dead ends: 74363 [2018-10-24 16:50:50,018 INFO L226 Difference]: Without dead ends: 44441 [2018-10-24 16:50:50,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:50:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44441 states. [2018-10-24 16:50:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44441 to 40175. [2018-10-24 16:50:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40175 states. [2018-10-24 16:50:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40175 states to 40175 states and 43048 transitions. [2018-10-24 16:50:50,391 INFO L78 Accepts]: Start accepts. Automaton has 40175 states and 43048 transitions. Word has length 909 [2018-10-24 16:50:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:50,392 INFO L481 AbstractCegarLoop]: Abstraction has 40175 states and 43048 transitions. [2018-10-24 16:50:50,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:50:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 40175 states and 43048 transitions. [2018-10-24 16:50:50,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2018-10-24 16:50:50,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:50,422 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:50:50,422 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:50,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1092524052, now seen corresponding path program 1 times [2018-10-24 16:50:50,423 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:50,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:50,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:50,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:50,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:51,163 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-24 16:50:51,410 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-10-24 16:50:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 704 proven. 83 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2018-10-24 16:50:52,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:50:52,872 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:50:52,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:53,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:50:53,624 WARN L179 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2018-10-24 16:50:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 849 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-10-24 16:50:55,994 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:50:55,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2018-10-24 16:50:55,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 16:50:55,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 16:50:55,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:50:55,996 INFO L87 Difference]: Start difference. First operand 40175 states and 43048 transitions. Second operand 11 states. [2018-10-24 16:51:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:51:15,942 INFO L93 Difference]: Finished difference Result 92414 states and 98801 transitions. [2018-10-24 16:51:15,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 16:51:15,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 914 [2018-10-24 16:51:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:51:15,989 INFO L225 Difference]: With dead ends: 92414 [2018-10-24 16:51:15,989 INFO L226 Difference]: Without dead ends: 52241 [2018-10-24 16:51:15,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 921 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2018-10-24 16:51:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52241 states. [2018-10-24 16:51:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52241 to 49985. [2018-10-24 16:51:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49985 states. [2018-10-24 16:51:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49985 states to 49985 states and 53054 transitions. [2018-10-24 16:51:16,433 INFO L78 Accepts]: Start accepts. Automaton has 49985 states and 53054 transitions. Word has length 914 [2018-10-24 16:51:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:51:16,433 INFO L481 AbstractCegarLoop]: Abstraction has 49985 states and 53054 transitions. [2018-10-24 16:51:16,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 16:51:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 49985 states and 53054 transitions. [2018-10-24 16:51:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1017 [2018-10-24 16:51:16,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:51:16,470 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:51:16,471 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:51:16,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:51:16,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1238219653, now seen corresponding path program 1 times [2018-10-24 16:51:16,471 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:51:16,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:51:16,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:16,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:16,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 734 proven. 6 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2018-10-24 16:51:17,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:51:17,677 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:51:17,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:17,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:51:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 734 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2018-10-24 16:51:18,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:51:18,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:51:18,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:51:18,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:51:18,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:51:18,680 INFO L87 Difference]: Start difference. First operand 49985 states and 53054 transitions. Second operand 5 states. [2018-10-24 16:51:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:51:25,272 INFO L93 Difference]: Finished difference Result 98687 states and 104803 transitions. [2018-10-24 16:51:25,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:51:25,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1016 [2018-10-24 16:51:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:51:25,318 INFO L225 Difference]: With dead ends: 98687 [2018-10-24 16:51:25,318 INFO L226 Difference]: Without dead ends: 49129 [2018-10-24 16:51:25,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 1017 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:51:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49129 states. [2018-10-24 16:51:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49129 to 49129. [2018-10-24 16:51:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49129 states. [2018-10-24 16:51:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49129 states to 49129 states and 52170 transitions. [2018-10-24 16:51:25,772 INFO L78 Accepts]: Start accepts. Automaton has 49129 states and 52170 transitions. Word has length 1016 [2018-10-24 16:51:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:51:25,773 INFO L481 AbstractCegarLoop]: Abstraction has 49129 states and 52170 transitions. [2018-10-24 16:51:25,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:51:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand 49129 states and 52170 transitions. [2018-10-24 16:51:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1138 [2018-10-24 16:51:25,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:51:25,807 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:51:25,807 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:51:25,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:51:25,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1539083905, now seen corresponding path program 1 times [2018-10-24 16:51:25,808 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:51:25,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:51:25,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:25,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:26,452 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-10-24 16:51:26,760 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 8 [2018-10-24 16:51:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2637 backedges. 1461 proven. 66 refuted. 0 times theorem prover too weak. 1110 trivial. 0 not checked. [2018-10-24 16:51:27,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:51:27,815 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:51:27,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:28,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:51:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2637 backedges. 1527 proven. 0 refuted. 0 times theorem prover too weak. 1110 trivial. 0 not checked. [2018-10-24 16:51:29,453 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:51:29,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2018-10-24 16:51:29,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:51:29,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:51:29,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:51:29,456 INFO L87 Difference]: Start difference. First operand 49129 states and 52170 transitions. Second operand 8 states. [2018-10-24 16:51:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:51:37,837 INFO L93 Difference]: Finished difference Result 99100 states and 105072 transitions. [2018-10-24 16:51:37,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:51:37,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1137 [2018-10-24 16:51:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:51:37,893 INFO L225 Difference]: With dead ends: 99100 [2018-10-24 16:51:37,893 INFO L226 Difference]: Without dead ends: 49971 [2018-10-24 16:51:37,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 1140 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:51:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49971 states. [2018-10-24 16:51:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49971 to 48265. [2018-10-24 16:51:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48265 states. [2018-10-24 16:51:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48265 states to 48265 states and 50933 transitions. [2018-10-24 16:51:38,569 INFO L78 Accepts]: Start accepts. Automaton has 48265 states and 50933 transitions. Word has length 1137 [2018-10-24 16:51:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:51:38,570 INFO L481 AbstractCegarLoop]: Abstraction has 48265 states and 50933 transitions. [2018-10-24 16:51:38,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:51:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 48265 states and 50933 transitions. [2018-10-24 16:51:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1190 [2018-10-24 16:51:38,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:51:38,606 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:51:38,607 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:51:38,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:51:38,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1114799130, now seen corresponding path program 1 times [2018-10-24 16:51:38,607 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:51:38,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:51:38,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:38,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:38,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 1490 proven. 1129 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-10-24 16:51:43,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:51:43,044 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:51:43,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:43,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:51:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 2051 proven. 128 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2018-10-24 16:51:44,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:51:44,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 4] total 16 [2018-10-24 16:51:44,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 16:51:44,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 16:51:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-10-24 16:51:44,369 INFO L87 Difference]: Start difference. First operand 48265 states and 50933 transitions. Second operand 16 states. [2018-10-24 16:52:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:19,425 INFO L93 Difference]: Finished difference Result 178821 states and 189440 transitions. [2018-10-24 16:52:19,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 16:52:19,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1189 [2018-10-24 16:52:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:19,563 INFO L225 Difference]: With dead ends: 178821 [2018-10-24 16:52:19,563 INFO L226 Difference]: Without dead ends: 130984 [2018-10-24 16:52:19,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1281 GetRequests, 1224 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=814, Invalid=2156, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 16:52:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130984 states. [2018-10-24 16:52:20,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130984 to 48672. [2018-10-24 16:52:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48672 states. [2018-10-24 16:52:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48672 states to 48672 states and 50973 transitions. [2018-10-24 16:52:20,451 INFO L78 Accepts]: Start accepts. Automaton has 48672 states and 50973 transitions. Word has length 1189 [2018-10-24 16:52:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:20,452 INFO L481 AbstractCegarLoop]: Abstraction has 48672 states and 50973 transitions. [2018-10-24 16:52:20,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 16:52:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 48672 states and 50973 transitions. [2018-10-24 16:52:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1729 [2018-10-24 16:52:20,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:20,499 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:52:20,500 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:20,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1390764680, now seen corresponding path program 1 times [2018-10-24 16:52:20,500 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:20,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:20,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:20,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:20,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4260 backedges. 2612 proven. 0 refuted. 0 times theorem prover too weak. 1648 trivial. 0 not checked. [2018-10-24 16:52:23,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:52:23,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:52:23,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:52:23,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:52:23,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:52:23,869 INFO L87 Difference]: Start difference. First operand 48672 states and 50973 transitions. Second operand 3 states. [2018-10-24 16:52:26,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:26,648 INFO L93 Difference]: Finished difference Result 99474 states and 104213 transitions. [2018-10-24 16:52:26,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:52:26,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1728 [2018-10-24 16:52:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:26,693 INFO L225 Difference]: With dead ends: 99474 [2018-10-24 16:52:26,693 INFO L226 Difference]: Without dead ends: 51230 [2018-10-24 16:52:26,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:52:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51230 states. [2018-10-24 16:52:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51230 to 50374. [2018-10-24 16:52:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50374 states. [2018-10-24 16:52:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50374 states to 50374 states and 52699 transitions. [2018-10-24 16:52:27,165 INFO L78 Accepts]: Start accepts. Automaton has 50374 states and 52699 transitions. Word has length 1728 [2018-10-24 16:52:27,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:27,166 INFO L481 AbstractCegarLoop]: Abstraction has 50374 states and 52699 transitions. [2018-10-24 16:52:27,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:52:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 50374 states and 52699 transitions. [2018-10-24 16:52:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1901 [2018-10-24 16:52:27,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:27,224 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:52:27,224 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:27,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:27,225 INFO L82 PathProgramCache]: Analyzing trace with hash 933356963, now seen corresponding path program 1 times [2018-10-24 16:52:27,225 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:27,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:27,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:27,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:27,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4742 backedges. 2678 proven. 340 refuted. 0 times theorem prover too weak. 1724 trivial. 0 not checked. [2018-10-24 16:52:30,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:52:30,374 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:52:30,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:30,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:52:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4742 backedges. 2953 proven. 0 refuted. 0 times theorem prover too weak. 1789 trivial. 0 not checked. [2018-10-24 16:52:33,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:52:33,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2018-10-24 16:52:33,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:52:33,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:52:33,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:52:33,720 INFO L87 Difference]: Start difference. First operand 50374 states and 52699 transitions. Second operand 9 states. Received shutdown request... [2018-10-24 16:52:37,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:52:37,173 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:52:37,188 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:52:37,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:52:37 BoogieIcfgContainer [2018-10-24 16:52:37,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:52:37,189 INFO L168 Benchmark]: Toolchain (without parser) took 232026.42 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-24 16:52:37,190 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:52:37,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1560.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 140.0 MB). Peak memory consumption was 140.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:52:37,192 INFO L168 Benchmark]: Boogie Procedure Inliner took 500.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 797.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -923.7 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:52:37,193 INFO L168 Benchmark]: Boogie Preprocessor took 299.75 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:52:37,193 INFO L168 Benchmark]: RCFGBuilder took 11486.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 482.0 MB). Peak memory consumption was 482.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:52:37,194 INFO L168 Benchmark]: TraceAbstraction took 218174.13 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 3.5 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-24 16:52:37,199 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1560.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 140.0 MB). Peak memory consumption was 140.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 500.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 797.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -923.7 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 299.75 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11486.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 482.0 MB). Peak memory consumption was 482.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218174.13 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 3.5 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 203]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 203). Cancelled while BasicCegarLoop was constructing difference of abstraction (50374states) and FLOYD_HOARE automaton (currently 9 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (1942 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 591 locations, 1 error locations. TIMEOUT Result, 218.0s OverallTime, 18 OverallIterations, 9 TraceHistogramMax, 172.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6728 SDtfs, 51141 SDslu, 2768 SDs, 0 SdLazy, 72577 SolverSat, 13084 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 146.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7528 GetRequests, 7390 SyntacticMatches, 16 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50374occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 115409 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 21.2s InterpolantComputationTime, 20605 NumberOfCodeBlocks, 20605 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 20580 ConstructedInterpolants, 485 QuantifiedInterpolants, 84625734 SizeOfPredicates, 3 NumberOfNonLiveVariables, 8622 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 25 InterpolantComputations, 15 PerfectInterpolantSequences, 33809/36516 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown