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/Problem12_label28_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 19:07:47,464 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:07:47,466 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:07:47,480 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:07:47,481 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:07:47,487 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:07:47,489 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:07:47,490 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:07:47,494 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:07:47,495 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:07:47,496 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:07:47,496 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:07:47,497 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:07:47,498 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:07:47,499 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:07:47,500 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:07:47,501 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:07:47,503 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:07:47,505 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:07:47,507 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:07:47,508 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:07:47,509 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:07:47,512 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:07:47,512 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:07:47,512 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:07:47,513 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:07:47,514 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:07:47,515 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:07:47,516 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:07:47,517 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:07:47,518 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:07:47,518 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 19:07:47,519 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 19:07:47,519 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 19:07:47,520 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 19:07:47,521 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 19:07:47,521 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 19:07:47,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:07:47,539 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:07:47,540 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:07:47,540 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 19:07:47,541 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 19:07:47,541 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 19:07:47,541 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 19:07:47,542 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:07:47,542 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 19:07:47,542 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:07:47,542 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:07:47,542 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:07:47,543 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:07:47,543 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:07:47,543 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:07:47,543 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:07:47,543 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:07:47,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:07:47,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:07:47,544 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:07:47,544 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:07:47,544 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:07:47,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:07:47,545 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 19:07:47,545 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:07:47,545 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 19:07:47,545 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 19:07:47,546 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 19:07:47,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:07:47,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:07:47,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:07:47,617 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:07:47,617 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:07:47,618 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label28_false-unreach-call.c [2018-10-26 19:07:47,687 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/57ec3d6ab/baa9d21e538d4f8c8005d20d40508a88/FLAGa27296548 [2018-10-26 19:07:48,491 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:07:48,492 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label28_false-unreach-call.c [2018-10-26 19:07:48,531 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/57ec3d6ab/baa9d21e538d4f8c8005d20d40508a88/FLAGa27296548 [2018-10-26 19:07:48,551 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/57ec3d6ab/baa9d21e538d4f8c8005d20d40508a88 [2018-10-26 19:07:48,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:07:48,563 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 19:07:48,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:07:48,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:07:48,570 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:07:48,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:07:48" (1/1) ... [2018-10-26 19:07:48,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b326c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:48, skipping insertion in model container [2018-10-26 19:07:48,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:07:48" (1/1) ... [2018-10-26 19:07:48,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:07:48,772 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:07:50,140 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:07:50,145 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:07:50,774 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:07:50,808 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:07:50,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50 WrapperNode [2018-10-26 19:07:50,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:07:50,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:07:50,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:07:50,811 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:07:50,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:50,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:51,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:07:51,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:07:51,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:07:51,450 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:07:51,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:51,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:51,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:51,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:51,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:51,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:51,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... [2018-10-26 19:07:51,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:07:51,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:07:51,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:07:51,878 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:07:51,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:07:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 19:07:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:07:51,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:08:00,221 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:08:00,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:08:00 BoogieIcfgContainer [2018-10-26 19:08:00,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:08:00,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:08:00,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:08:00,227 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:08:00,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:07:48" (1/3) ... [2018-10-26 19:08:00,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6502e358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:08:00, skipping insertion in model container [2018-10-26 19:08:00,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:07:50" (2/3) ... [2018-10-26 19:08:00,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6502e358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:08:00, skipping insertion in model container [2018-10-26 19:08:00,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:08:00" (3/3) ... [2018-10-26 19:08:00,231 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label28_false-unreach-call.c [2018-10-26 19:08:00,241 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:08:00,250 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:08:00,268 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:08:00,311 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 19:08:00,312 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:08:00,312 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:08:00,312 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:08:00,313 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:08:00,313 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:08:00,313 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:08:00,313 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:08:00,313 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:08:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-26 19:08:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-26 19:08:00,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:08:00,359 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] [2018-10-26 19:08:00,361 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:08:00,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:08:00,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1407492386, now seen corresponding path program 1 times [2018-10-26 19:08:00,376 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:08:00,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:08:00,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:08:00,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:08:00,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:08:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:08:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:08:00,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:08:00,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:08:00,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:08:00,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:08:00,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:08:00,733 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-26 19:08:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:08:14,385 INFO L93 Difference]: Finished difference Result 3162 states and 6150 transitions. [2018-10-26 19:08:14,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:08:14,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-10-26 19:08:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:08:14,430 INFO L225 Difference]: With dead ends: 3162 [2018-10-26 19:08:14,430 INFO L226 Difference]: Without dead ends: 2336 [2018-10-26 19:08:14,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:08:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2018-10-26 19:08:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1568. [2018-10-26 19:08:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1568 states. [2018-10-26 19:08:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2556 transitions. [2018-10-26 19:08:14,577 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2556 transitions. Word has length 21 [2018-10-26 19:08:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:08:14,578 INFO L481 AbstractCegarLoop]: Abstraction has 1568 states and 2556 transitions. [2018-10-26 19:08:14,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:08:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2556 transitions. [2018-10-26 19:08:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-26 19:08:14,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:08:14,584 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 19:08:14,585 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:08:14,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:08:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash -108947812, now seen corresponding path program 1 times [2018-10-26 19:08:14,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:08:14,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:08:14,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:08:14,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:08:14,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:08:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:08:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:08:15,059 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:08:15,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:08:15,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:08:15,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:08:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:08:15,064 INFO L87 Difference]: Start difference. First operand 1568 states and 2556 transitions. Second operand 4 states. [2018-10-26 19:08:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:08:28,922 INFO L93 Difference]: Finished difference Result 6142 states and 10096 transitions. [2018-10-26 19:08:28,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:08:28,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2018-10-26 19:08:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:08:28,953 INFO L225 Difference]: With dead ends: 6142 [2018-10-26 19:08:28,954 INFO L226 Difference]: Without dead ends: 4576 [2018-10-26 19:08:28,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:08:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4576 states. [2018-10-26 19:08:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4576 to 4576. [2018-10-26 19:08:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4576 states. [2018-10-26 19:08:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6531 transitions. [2018-10-26 19:08:29,057 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6531 transitions. Word has length 97 [2018-10-26 19:08:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:08:29,057 INFO L481 AbstractCegarLoop]: Abstraction has 4576 states and 6531 transitions. [2018-10-26 19:08:29,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:08:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6531 transitions. [2018-10-26 19:08:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-26 19:08:29,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:08:29,061 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 19:08:29,061 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:08:29,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:08:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash 123184929, now seen corresponding path program 1 times [2018-10-26 19:08:29,062 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:08:29,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:08:29,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:08:29,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:08:29,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:08:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:08:29,681 WARN L179 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2018-10-26 19:08:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:08:29,742 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:08:29,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 19:08:29,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 19:08:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 19:08:29,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:08:29,744 INFO L87 Difference]: Start difference. First operand 4576 states and 6531 transitions. Second operand 6 states. [2018-10-26 19:08:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:08:41,685 INFO L93 Difference]: Finished difference Result 15166 states and 21142 transitions. [2018-10-26 19:08:41,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:08:41,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2018-10-26 19:08:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:08:41,732 INFO L225 Difference]: With dead ends: 15166 [2018-10-26 19:08:41,732 INFO L226 Difference]: Without dead ends: 10592 [2018-10-26 19:08:41,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 19:08:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10592 states. [2018-10-26 19:08:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10592 to 10592. [2018-10-26 19:08:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10592 states. [2018-10-26 19:08:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 14292 transitions. [2018-10-26 19:08:41,930 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 14292 transitions. Word has length 99 [2018-10-26 19:08:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:08:41,931 INFO L481 AbstractCegarLoop]: Abstraction has 10592 states and 14292 transitions. [2018-10-26 19:08:41,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 19:08:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 14292 transitions. [2018-10-26 19:08:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-26 19:08:41,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:08:41,938 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:08:41,938 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:08:41,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:08:41,938 INFO L82 PathProgramCache]: Analyzing trace with hash 289797009, now seen corresponding path program 1 times [2018-10-26 19:08:41,939 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:08:41,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:08:41,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:08:41,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:08:41,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:08:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:08:42,424 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-10-26 19:08:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 103 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:08:42,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:08:42,532 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:08:42,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:08:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:08:42,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:08:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:08:42,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:08:42,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-26 19:08:42,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 19:08:42,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 19:08:42,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 19:08:42,824 INFO L87 Difference]: Start difference. First operand 10592 states and 14292 transitions. Second operand 7 states. [2018-10-26 19:09:06,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:09:06,414 INFO L93 Difference]: Finished difference Result 41518 states and 54744 transitions. [2018-10-26 19:09:06,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 19:09:06,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2018-10-26 19:09:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:09:06,496 INFO L225 Difference]: With dead ends: 41518 [2018-10-26 19:09:06,497 INFO L226 Difference]: Without dead ends: 29421 [2018-10-26 19:09:06,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-26 19:09:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29421 states. [2018-10-26 19:09:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29421 to 20367. [2018-10-26 19:09:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20367 states. [2018-10-26 19:09:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20367 states to 20367 states and 25010 transitions. [2018-10-26 19:09:06,946 INFO L78 Accepts]: Start accepts. Automaton has 20367 states and 25010 transitions. Word has length 171 [2018-10-26 19:09:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:09:06,946 INFO L481 AbstractCegarLoop]: Abstraction has 20367 states and 25010 transitions. [2018-10-26 19:09:06,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 19:09:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 20367 states and 25010 transitions. [2018-10-26 19:09:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-26 19:09:06,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:09:06,953 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:09:06,954 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:09:06,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:09:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash -237418466, now seen corresponding path program 1 times [2018-10-26 19:09:06,954 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:09:06,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:09:06,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:06,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:09:06,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:09:07,345 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-26 19:09:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-26 19:09:07,445 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:09:07,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:09:07,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:09:07,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:09:07,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:09:07,447 INFO L87 Difference]: Start difference. First operand 20367 states and 25010 transitions. Second operand 4 states. [2018-10-26 19:09:14,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:09:14,417 INFO L93 Difference]: Finished difference Result 73068 states and 91010 transitions. [2018-10-26 19:09:14,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:09:14,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 253 [2018-10-26 19:09:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:09:14,508 INFO L225 Difference]: With dead ends: 73068 [2018-10-26 19:09:14,509 INFO L226 Difference]: Without dead ends: 53455 [2018-10-26 19:09:14,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:09:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53455 states. [2018-10-26 19:09:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53455 to 53455. [2018-10-26 19:09:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53455 states. [2018-10-26 19:09:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53455 states to 53455 states and 62566 transitions. [2018-10-26 19:09:15,336 INFO L78 Accepts]: Start accepts. Automaton has 53455 states and 62566 transitions. Word has length 253 [2018-10-26 19:09:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:09:15,337 INFO L481 AbstractCegarLoop]: Abstraction has 53455 states and 62566 transitions. [2018-10-26 19:09:15,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:09:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 53455 states and 62566 transitions. [2018-10-26 19:09:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-26 19:09:15,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:09:15,345 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:09:15,346 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:09:15,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:09:15,346 INFO L82 PathProgramCache]: Analyzing trace with hash -822131366, now seen corresponding path program 1 times [2018-10-26 19:09:15,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:09:15,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:09:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:15,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:09:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:09:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-10-26 19:09:15,628 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:09:15,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:09:15,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:09:15,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:09:15,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:09:15,629 INFO L87 Difference]: Start difference. First operand 53455 states and 62566 transitions. Second operand 4 states. [2018-10-26 19:09:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:09:27,014 INFO L93 Difference]: Finished difference Result 118188 states and 138227 transitions. [2018-10-26 19:09:27,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:09:27,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 277 [2018-10-26 19:09:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:09:27,137 INFO L225 Difference]: With dead ends: 118188 [2018-10-26 19:09:27,138 INFO L226 Difference]: Without dead ends: 65487 [2018-10-26 19:09:27,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:09:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65487 states. [2018-10-26 19:09:27,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65487 to 63231. [2018-10-26 19:09:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63231 states. [2018-10-26 19:09:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63231 states to 63231 states and 70574 transitions. [2018-10-26 19:09:27,889 INFO L78 Accepts]: Start accepts. Automaton has 63231 states and 70574 transitions. Word has length 277 [2018-10-26 19:09:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:09:27,890 INFO L481 AbstractCegarLoop]: Abstraction has 63231 states and 70574 transitions. [2018-10-26 19:09:27,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:09:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 63231 states and 70574 transitions. [2018-10-26 19:09:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-10-26 19:09:27,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:09:27,913 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:09:27,913 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:09:27,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:09:27,914 INFO L82 PathProgramCache]: Analyzing trace with hash 205014611, now seen corresponding path program 1 times [2018-10-26 19:09:27,914 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:09:27,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:09:27,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:27,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:09:27,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:09:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2018-10-26 19:09:28,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:09:28,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:09:28,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:09:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:09:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:09:28,464 INFO L87 Difference]: Start difference. First operand 63231 states and 70574 transitions. Second operand 4 states. [2018-10-26 19:09:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:09:37,183 INFO L93 Difference]: Finished difference Result 153532 states and 171295 transitions. [2018-10-26 19:09:37,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:09:37,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 455 [2018-10-26 19:09:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:09:37,308 INFO L225 Difference]: With dead ends: 153532 [2018-10-26 19:09:37,309 INFO L226 Difference]: Without dead ends: 91055 [2018-10-26 19:09:37,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:09:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91055 states. [2018-10-26 19:09:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91055 to 89551. [2018-10-26 19:09:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89551 states. [2018-10-26 19:09:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89551 states to 89551 states and 98837 transitions. [2018-10-26 19:09:38,360 INFO L78 Accepts]: Start accepts. Automaton has 89551 states and 98837 transitions. Word has length 455 [2018-10-26 19:09:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:09:38,361 INFO L481 AbstractCegarLoop]: Abstraction has 89551 states and 98837 transitions. [2018-10-26 19:09:38,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:09:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 89551 states and 98837 transitions. [2018-10-26 19:09:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-10-26 19:09:38,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:09:38,386 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:09:38,386 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:09:38,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:09:38,387 INFO L82 PathProgramCache]: Analyzing trace with hash 301486380, now seen corresponding path program 1 times [2018-10-26 19:09:38,387 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:09:38,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:09:38,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:38,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:09:38,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:09:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 494 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-26 19:09:38,829 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:09:38,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:09:38,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:09:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:09:38,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:09:38,830 INFO L87 Difference]: Start difference. First operand 89551 states and 98837 transitions. Second operand 3 states. [2018-10-26 19:09:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:09:47,273 INFO L93 Difference]: Finished difference Result 219708 states and 244034 transitions. [2018-10-26 19:09:47,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:09:47,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 458 [2018-10-26 19:09:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:09:47,444 INFO L225 Difference]: With dead ends: 219708 [2018-10-26 19:09:47,444 INFO L226 Difference]: Without dead ends: 130911 [2018-10-26 19:09:47,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:09:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130911 states. [2018-10-26 19:09:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130911 to 127903. [2018-10-26 19:09:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127903 states. [2018-10-26 19:09:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127903 states to 127903 states and 139698 transitions. [2018-10-26 19:09:48,739 INFO L78 Accepts]: Start accepts. Automaton has 127903 states and 139698 transitions. Word has length 458 [2018-10-26 19:09:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:09:48,740 INFO L481 AbstractCegarLoop]: Abstraction has 127903 states and 139698 transitions. [2018-10-26 19:09:48,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:09:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 127903 states and 139698 transitions. [2018-10-26 19:09:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-10-26 19:09:48,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:09:48,757 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:09:48,758 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:09:48,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:09:48,758 INFO L82 PathProgramCache]: Analyzing trace with hash 527802991, now seen corresponding path program 1 times [2018-10-26 19:09:48,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:09:48,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:09:48,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:48,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:09:48,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:09:49,280 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-26 19:09:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 563 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-26 19:09:50,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:09:50,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 19:09:50,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 19:09:50,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 19:09:50,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:09:50,026 INFO L87 Difference]: Start difference. First operand 127903 states and 139698 transitions. Second operand 6 states. [2018-10-26 19:09:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:09:58,175 INFO L93 Difference]: Finished difference Result 254876 states and 278389 transitions. [2018-10-26 19:09:58,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:09:58,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 495 [2018-10-26 19:09:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:09:58,299 INFO L225 Difference]: With dead ends: 254876 [2018-10-26 19:09:58,299 INFO L226 Difference]: Without dead ends: 108142 [2018-10-26 19:09:58,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:09:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108142 states. [2018-10-26 19:09:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108142 to 103806. [2018-10-26 19:09:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103806 states. [2018-10-26 19:09:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103806 states to 103806 states and 109243 transitions. [2018-10-26 19:09:59,421 INFO L78 Accepts]: Start accepts. Automaton has 103806 states and 109243 transitions. Word has length 495 [2018-10-26 19:09:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:09:59,421 INFO L481 AbstractCegarLoop]: Abstraction has 103806 states and 109243 transitions. [2018-10-26 19:09:59,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 19:09:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 103806 states and 109243 transitions. [2018-10-26 19:09:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2018-10-26 19:09:59,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:09:59,440 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:09:59,440 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:09:59,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:09:59,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1188711367, now seen corresponding path program 1 times [2018-10-26 19:09:59,440 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:09:59,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:09:59,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:59,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:09:59,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:09:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:10:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2018-10-26 19:10:00,276 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:10:00,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:10:00,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:10:00,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:10:00,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:10:00,277 INFO L87 Difference]: Start difference. First operand 103806 states and 109243 transitions. Second operand 3 states. [2018-10-26 19:10:04,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:10:04,641 INFO L93 Difference]: Finished difference Result 208362 states and 219438 transitions. [2018-10-26 19:10:04,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:10:04,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 516 [2018-10-26 19:10:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:10:04,759 INFO L225 Difference]: With dead ends: 208362 [2018-10-26 19:10:04,760 INFO L226 Difference]: Without dead ends: 105310 [2018-10-26 19:10:04,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:10:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105310 states. [2018-10-26 19:10:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105310 to 103054. [2018-10-26 19:10:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103054 states. [2018-10-26 19:10:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103054 states to 103054 states and 107783 transitions. [2018-10-26 19:10:05,617 INFO L78 Accepts]: Start accepts. Automaton has 103054 states and 107783 transitions. Word has length 516 [2018-10-26 19:10:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:10:05,618 INFO L481 AbstractCegarLoop]: Abstraction has 103054 states and 107783 transitions. [2018-10-26 19:10:05,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:10:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 103054 states and 107783 transitions. [2018-10-26 19:10:05,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2018-10-26 19:10:05,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:10:05,649 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:10:05,650 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:10:05,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:10:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash 906766203, now seen corresponding path program 1 times [2018-10-26 19:10:05,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:10:05,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:10:05,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:10:05,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:10:05,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:10:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:10:06,254 WARN L179 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-26 19:10:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 413 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-26 19:10:07,122 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:10:07,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:10:07,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:10:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:10:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:10:07,124 INFO L87 Difference]: Start difference. First operand 103054 states and 107783 transitions. Second operand 4 states. [2018-10-26 19:10:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:10:12,983 INFO L93 Difference]: Finished difference Result 211370 states and 220948 transitions. [2018-10-26 19:10:12,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:10:12,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 697 [2018-10-26 19:10:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:10:13,112 INFO L225 Difference]: With dead ends: 211370 [2018-10-26 19:10:13,112 INFO L226 Difference]: Without dead ends: 109070 [2018-10-26 19:10:13,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:10:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109070 states. [2018-10-26 19:10:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109070 to 105310. [2018-10-26 19:10:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105310 states. [2018-10-26 19:10:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105310 states to 105310 states and 109789 transitions. [2018-10-26 19:10:13,994 INFO L78 Accepts]: Start accepts. Automaton has 105310 states and 109789 transitions. Word has length 697 [2018-10-26 19:10:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:10:13,994 INFO L481 AbstractCegarLoop]: Abstraction has 105310 states and 109789 transitions. [2018-10-26 19:10:13,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:10:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 105310 states and 109789 transitions. [2018-10-26 19:10:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2018-10-26 19:10:14,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:10:14,015 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:10:14,016 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:10:14,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:10:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1854111483, now seen corresponding path program 1 times [2018-10-26 19:10:14,016 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:10:14,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:10:14,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:10:14,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:10:14,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:10:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:10:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-26 19:10:15,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:10:15,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:10:15,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:10:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:10:15,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:10:15,308 INFO L87 Difference]: Start difference. First operand 105310 states and 109789 transitions. Second operand 4 states. [2018-10-26 19:10:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:10:22,335 INFO L93 Difference]: Finished difference Result 221898 states and 232090 transitions. [2018-10-26 19:10:22,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:10:22,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 701 [2018-10-26 19:10:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:10:22,463 INFO L225 Difference]: With dead ends: 221898 [2018-10-26 19:10:22,463 INFO L226 Difference]: Without dead ends: 117342 [2018-10-26 19:10:22,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:10:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117342 states. [2018-10-26 19:10:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117342 to 115086. [2018-10-26 19:10:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115086 states. [2018-10-26 19:10:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115086 states to 115086 states and 119887 transitions. [2018-10-26 19:10:24,085 INFO L78 Accepts]: Start accepts. Automaton has 115086 states and 119887 transitions. Word has length 701 [2018-10-26 19:10:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:10:24,085 INFO L481 AbstractCegarLoop]: Abstraction has 115086 states and 119887 transitions. [2018-10-26 19:10:24,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:10:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 115086 states and 119887 transitions. [2018-10-26 19:10:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2018-10-26 19:10:24,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:10:24,141 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:10:24,141 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:10:24,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:10:24,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1795719671, now seen corresponding path program 1 times [2018-10-26 19:10:24,142 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:10:24,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:10:24,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:10:24,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:10:24,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:10:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:10:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 881 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-26 19:10:24,882 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:10:24,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:10:24,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:10:24,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:10:24,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:10:24,884 INFO L87 Difference]: Start difference. First operand 115086 states and 119887 transitions. Second operand 4 states. [2018-10-26 19:10:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:10:32,771 INFO L93 Difference]: Finished difference Result 230922 states and 240534 transitions. [2018-10-26 19:10:32,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:10:32,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 914 [2018-10-26 19:10:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:10:32,881 INFO L225 Difference]: With dead ends: 230922 [2018-10-26 19:10:32,881 INFO L226 Difference]: Without dead ends: 109810 [2018-10-26 19:10:32,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:10:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109810 states. [2018-10-26 19:10:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109810 to 102290. [2018-10-26 19:10:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102290 states. [2018-10-26 19:10:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102290 states to 102290 states and 105470 transitions. [2018-10-26 19:10:33,760 INFO L78 Accepts]: Start accepts. Automaton has 102290 states and 105470 transitions. Word has length 914 [2018-10-26 19:10:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:10:33,760 INFO L481 AbstractCegarLoop]: Abstraction has 102290 states and 105470 transitions. [2018-10-26 19:10:33,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:10:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 102290 states and 105470 transitions. [2018-10-26 19:10:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1080 [2018-10-26 19:10:33,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:10:33,803 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:10:33,803 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:10:33,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:10:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1681668241, now seen corresponding path program 1 times [2018-10-26 19:10:33,804 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:10:33,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:10:33,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:10:33,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:10:33,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:10:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:10:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 1026 proven. 461 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-26 19:10:35,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:10:35,994 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:10:36,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:10:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:10:36,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:10:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 1262 proven. 0 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2018-10-26 19:10:37,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:10:37,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2018-10-26 19:10:37,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 19:10:37,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 19:10:37,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-26 19:10:37,333 INFO L87 Difference]: Start difference. First operand 102290 states and 105470 transitions. Second operand 11 states. [2018-10-26 19:11:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:11:15,629 INFO L93 Difference]: Finished difference Result 231651 states and 239095 transitions. [2018-10-26 19:11:15,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 19:11:15,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1079 [2018-10-26 19:11:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:11:15,770 INFO L225 Difference]: With dead ends: 231651 [2018-10-26 19:11:15,770 INFO L226 Difference]: Without dead ends: 122585 [2018-10-26 19:11:15,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1085 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-10-26 19:11:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122585 states. [2018-10-26 19:11:16,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122585 to 97017. [2018-10-26 19:11:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97017 states. [2018-10-26 19:11:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97017 states to 97017 states and 99475 transitions. [2018-10-26 19:11:16,802 INFO L78 Accepts]: Start accepts. Automaton has 97017 states and 99475 transitions. Word has length 1079 [2018-10-26 19:11:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:11:16,802 INFO L481 AbstractCegarLoop]: Abstraction has 97017 states and 99475 transitions. [2018-10-26 19:11:16,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 19:11:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 97017 states and 99475 transitions. [2018-10-26 19:11:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2018-10-26 19:11:16,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:11:16,851 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:11:16,852 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:11:16,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:11:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1847261044, now seen corresponding path program 1 times [2018-10-26 19:11:16,852 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:11:16,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:11:16,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:11:16,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:11:16,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:11:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:11:17,906 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-26 19:11:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1630 backedges. 760 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-10-26 19:11:19,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:11:19,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:11:19,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:11:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:11:19,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:11:19,642 INFO L87 Difference]: Start difference. First operand 97017 states and 99475 transitions. Second operand 4 states. [2018-10-26 19:11:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:11:26,515 INFO L93 Difference]: Finished difference Result 222608 states and 228383 transitions. [2018-10-26 19:11:26,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:11:26,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1104 [2018-10-26 19:11:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:11:26,663 INFO L225 Difference]: With dead ends: 222608 [2018-10-26 19:11:26,663 INFO L226 Difference]: Without dead ends: 125592 [2018-10-26 19:11:26,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:11:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125592 states. [2018-10-26 19:11:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125592 to 110552. [2018-10-26 19:11:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110552 states. [2018-10-26 19:11:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110552 states to 110552 states and 113244 transitions. [2018-10-26 19:11:28,229 INFO L78 Accepts]: Start accepts. Automaton has 110552 states and 113244 transitions. Word has length 1104 [2018-10-26 19:11:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:11:28,230 INFO L481 AbstractCegarLoop]: Abstraction has 110552 states and 113244 transitions. [2018-10-26 19:11:28,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:11:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 110552 states and 113244 transitions. [2018-10-26 19:11:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1130 [2018-10-26 19:11:28,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:11:28,288 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:11:28,289 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:11:28,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:11:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash 590833190, now seen corresponding path program 1 times [2018-10-26 19:11:28,289 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:11:28,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:11:28,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:11:28,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:11:28,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:11:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:11:29,282 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-10-26 19:11:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 1353 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2018-10-26 19:11:29,946 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:11:29,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:11:29,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:11:29,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:11:29,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:11:29,947 INFO L87 Difference]: Start difference. First operand 110552 states and 113244 transitions. Second operand 4 states. Received shutdown request... [2018-10-26 19:11:36,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:11:36,221 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 19:11:36,226 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 19:11:36,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:11:36 BoogieIcfgContainer [2018-10-26 19:11:36,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 19:11:36,228 INFO L168 Benchmark]: Toolchain (without parser) took 227665.78 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -538.2 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-26 19:11:36,229 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 19:11:36,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2245.31 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-26 19:11:36,230 INFO L168 Benchmark]: Boogie Procedure Inliner took 638.89 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.0 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -995.4 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2018-10-26 19:11:36,231 INFO L168 Benchmark]: Boogie Preprocessor took 427.80 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: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2018-10-26 19:11:36,232 INFO L168 Benchmark]: RCFGBuilder took 8344.23 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 212.9 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -176.7 MB). Peak memory consumption was 620.6 MB. Max. memory is 7.1 GB. [2018-10-26 19:11:36,233 INFO L168 Benchmark]: TraceAbstraction took 216003.61 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 2.3 GB in the beginning and 1.9 GB in the end (delta: 369.8 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-26 19:11:36,238 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 2245.31 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 638.89 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.0 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -995.4 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 427.80 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: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8344.23 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 212.9 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -176.7 MB). Peak memory consumption was 620.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216003.61 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 2.3 GB in the beginning and 1.9 GB in the end (delta: 369.8 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 72). Cancelled while BasicCegarLoop was constructing difference of abstraction (110552states) and FLOYD_HOARE automaton (currently 4 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (126648 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 215.9s OverallTime, 16 OverallIterations, 7 TraceHistogramMax, 185.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10139 SDtfs, 36288 SDslu, 1520 SDs, 0 SdLazy, 104621 SolverSat, 14774 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 148.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1349 GetRequests, 1282 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127903occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 12.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 77326 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 9716 NumberOfCodeBlocks, 9716 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 9698 ConstructedInterpolants, 0 QuantifiedInterpolants, 17008353 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1551 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 18 InterpolantComputations, 16 PerfectInterpolantSequences, 11616/12082 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown