java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label44_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 19:16:43,221 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:16:43,224 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:16:43,242 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:16:43,243 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:16:43,245 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:16:43,246 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:16:43,249 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:16:43,251 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:16:43,256 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:16:43,260 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:16:43,260 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:16:43,261 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:16:43,262 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:16:43,263 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:16:43,264 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:16:43,265 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:16:43,267 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:16:43,268 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:16:43,270 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:16:43,271 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:16:43,272 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:16:43,274 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:16:43,274 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:16:43,274 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:16:43,275 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:16:43,276 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:16:43,277 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:16:43,278 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:16:43,279 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:16:43,279 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:16:43,279 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 19:16:43,282 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 19:16:43,309 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:16:43,310 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:16:43,314 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:16:43,314 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 19:16:43,315 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 19:16:43,315 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 19:16:43,316 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 19:16:43,316 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:16:43,316 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 19:16:43,316 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:16:43,317 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:16:43,318 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:16:43,318 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:16:43,318 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:16:43,318 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:16:43,318 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:16:43,319 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:16:43,319 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:16:43,319 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:16:43,319 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:16:43,319 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:16:43,320 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:16:43,321 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:16:43,321 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 19:16:43,321 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:16:43,322 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 19:16:43,322 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 19:16:43,322 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 19:16:43,388 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:16:43,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:16:43,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:16:43,406 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:16:43,407 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:16:43,407 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label44_false-unreach-call.c [2018-10-26 19:16:43,477 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f0818b172/10842240562d4c2a9c18a6ab10d2aaf8/FLAGee1e59ad1 [2018-10-26 19:16:44,327 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:16:44,328 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label44_false-unreach-call.c [2018-10-26 19:16:44,368 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f0818b172/10842240562d4c2a9c18a6ab10d2aaf8/FLAGee1e59ad1 [2018-10-26 19:16:44,394 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f0818b172/10842240562d4c2a9c18a6ab10d2aaf8 [2018-10-26 19:16:44,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:16:44,411 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 19:16:44,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:16:44,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:16:44,417 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:16:44,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:16:44" (1/1) ... [2018-10-26 19:16:44,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d4e6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:44, skipping insertion in model container [2018-10-26 19:16:44,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:16:44" (1/1) ... [2018-10-26 19:16:44,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:16:44,636 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:16:46,020 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:16:46,026 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:16:46,779 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:16:46,817 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:16:46,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46 WrapperNode [2018-10-26 19:16:46,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:16:46,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:16:46,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:16:46,819 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:16:46,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:46,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:47,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:16:47,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:16:47,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:16:47,708 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:16:47,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:47,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:47,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:47,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:48,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:48,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:48,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... [2018-10-26 19:16:48,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:16:48,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:16:48,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:16:48,306 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:16:48,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:16:48,373 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 19:16:48,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:16:48,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:17:02,602 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:17:02,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:02 BoogieIcfgContainer [2018-10-26 19:17:02,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:17:02,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:17:02,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:17:02,607 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:17:02,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:16:44" (1/3) ... [2018-10-26 19:17:02,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f82a31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:02, skipping insertion in model container [2018-10-26 19:17:02,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:46" (2/3) ... [2018-10-26 19:17:02,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f82a31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:02, skipping insertion in model container [2018-10-26 19:17:02,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:02" (3/3) ... [2018-10-26 19:17:02,613 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label44_false-unreach-call.c [2018-10-26 19:17:02,624 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:17:02,641 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:17:02,661 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:17:02,717 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 19:17:02,717 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:17:02,717 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:17:02,717 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:17:02,718 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:17:02,718 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:17:02,718 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:17:02,718 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:17:02,718 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:17:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-26 19:17:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-26 19:17:02,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:17:02,771 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:17:02,773 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:17:02,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:17:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash -692138422, now seen corresponding path program 1 times [2018-10-26 19:17:02,781 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:17:02,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:17:02,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:02,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:17:02,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:17:03,165 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 19:17:03,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:17:03,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:17:03,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:17:03,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:17:03,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:17:03,195 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-26 19:17:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:17:18,003 INFO L93 Difference]: Finished difference Result 3863 states and 7261 transitions. [2018-10-26 19:17:18,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:17:18,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2018-10-26 19:17:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:17:18,051 INFO L225 Difference]: With dead ends: 3863 [2018-10-26 19:17:18,051 INFO L226 Difference]: Without dead ends: 2757 [2018-10-26 19:17:18,062 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 19:17:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-10-26 19:17:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2736. [2018-10-26 19:17:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2736 states. [2018-10-26 19:17:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4486 transitions. [2018-10-26 19:17:18,227 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4486 transitions. Word has length 31 [2018-10-26 19:17:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:17:18,227 INFO L481 AbstractCegarLoop]: Abstraction has 2736 states and 4486 transitions. [2018-10-26 19:17:18,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:17:18,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4486 transitions. [2018-10-26 19:17:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-26 19:17:18,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:17:18,234 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:18,234 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:17:18,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:17:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1047653544, now seen corresponding path program 1 times [2018-10-26 19:17:18,235 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:17:18,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:17:18,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:18,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:17:18,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:17:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:17:18,526 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:17:18,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:17:18,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:17:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:17:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:17:18,529 INFO L87 Difference]: Start difference. First operand 2736 states and 4486 transitions. Second operand 4 states. [2018-10-26 19:17:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:17:35,254 INFO L93 Difference]: Finished difference Result 10269 states and 17048 transitions. [2018-10-26 19:17:35,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:17:35,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2018-10-26 19:17:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:17:35,297 INFO L225 Difference]: With dead ends: 10269 [2018-10-26 19:17:35,298 INFO L226 Difference]: Without dead ends: 7535 [2018-10-26 19:17:35,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:17:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2018-10-26 19:17:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 7527. [2018-10-26 19:17:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7527 states. [2018-10-26 19:17:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 11327 transitions. [2018-10-26 19:17:35,463 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 11327 transitions. Word has length 118 [2018-10-26 19:17:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:17:35,464 INFO L481 AbstractCegarLoop]: Abstraction has 7527 states and 11327 transitions. [2018-10-26 19:17:35,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:17:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 11327 transitions. [2018-10-26 19:17:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-26 19:17:35,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:17:35,468 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:35,468 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:17:35,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:17:35,468 INFO L82 PathProgramCache]: Analyzing trace with hash -253631191, now seen corresponding path program 1 times [2018-10-26 19:17:35,469 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:17:35,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:17:35,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:35,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:17:35,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:17:35,925 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 19:17:36,081 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-26 19:17:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 19:17:36,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:17:36,212 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 19:17:36,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:17:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:17:36,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:17:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-26 19:17:36,607 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:17:36,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-26 19:17:36,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 19:17:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 19:17:36,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:17:36,612 INFO L87 Difference]: Start difference. First operand 7527 states and 11327 transitions. Second operand 6 states. [2018-10-26 19:17:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:17:52,547 INFO L93 Difference]: Finished difference Result 31771 states and 47113 transitions. [2018-10-26 19:17:52,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 19:17:52,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-10-26 19:17:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:17:52,634 INFO L225 Difference]: With dead ends: 31771 [2018-10-26 19:17:52,634 INFO L226 Difference]: Without dead ends: 24246 [2018-10-26 19:17:52,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 19:17:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2018-10-26 19:17:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16988. [2018-10-26 19:17:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16988 states. [2018-10-26 19:17:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16988 states to 16988 states and 22868 transitions. [2018-10-26 19:17:53,032 INFO L78 Accepts]: Start accepts. Automaton has 16988 states and 22868 transitions. Word has length 128 [2018-10-26 19:17:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:17:53,033 INFO L481 AbstractCegarLoop]: Abstraction has 16988 states and 22868 transitions. [2018-10-26 19:17:53,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 19:17:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 16988 states and 22868 transitions. [2018-10-26 19:17:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-26 19:17:53,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:17:53,043 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 19:17:53,044 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:17:53,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:17:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1517224282, now seen corresponding path program 1 times [2018-10-26 19:17:53,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:17:53,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:17:53,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:53,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:17:53,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:17:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-10-26 19:17:53,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:17:53,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:17:53,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:17:53,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:17:53,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:17:53,556 INFO L87 Difference]: Start difference. First operand 16988 states and 22868 transitions. Second operand 5 states. [2018-10-26 19:18:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:18:14,000 INFO L93 Difference]: Finished difference Result 76838 states and 105623 transitions. [2018-10-26 19:18:14,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:18:14,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 274 [2018-10-26 19:18:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:18:14,127 INFO L225 Difference]: With dead ends: 76838 [2018-10-26 19:18:14,127 INFO L226 Difference]: Without dead ends: 60640 [2018-10-26 19:18:14,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:18:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60640 states. [2018-10-26 19:18:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60640 to 60479. [2018-10-26 19:18:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60479 states. [2018-10-26 19:18:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60479 states to 60479 states and 78589 transitions. [2018-10-26 19:18:15,034 INFO L78 Accepts]: Start accepts. Automaton has 60479 states and 78589 transitions. Word has length 274 [2018-10-26 19:18:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:18:15,035 INFO L481 AbstractCegarLoop]: Abstraction has 60479 states and 78589 transitions. [2018-10-26 19:18:15,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:18:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 60479 states and 78589 transitions. [2018-10-26 19:18:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-26 19:18:15,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:18:15,046 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-26 19:18:15,047 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:18:15,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:18:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1256362251, now seen corresponding path program 1 times [2018-10-26 19:18:15,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:18:15,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:18:15,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:15,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:15,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:15,770 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-26 19:18:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 200 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-10-26 19:18:15,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:18:15,827 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 19:18:15,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:15,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:18:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-10-26 19:18:16,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:18:16,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 19:18:16,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:18:16,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:18:16,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:18:16,049 INFO L87 Difference]: Start difference. First operand 60479 states and 78589 transitions. Second operand 4 states. [2018-10-26 19:18:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:18:27,166 INFO L93 Difference]: Finished difference Result 188831 states and 245649 transitions. [2018-10-26 19:18:27,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:18:27,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 275 [2018-10-26 19:18:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:18:27,878 INFO L225 Difference]: With dead ends: 188831 [2018-10-26 19:18:27,878 INFO L226 Difference]: Without dead ends: 129142 [2018-10-26 19:18:27,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:18:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129142 states. [2018-10-26 19:18:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129142 to 91995. [2018-10-26 19:18:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91995 states. [2018-10-26 19:18:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91995 states to 91995 states and 114964 transitions. [2018-10-26 19:18:29,173 INFO L78 Accepts]: Start accepts. Automaton has 91995 states and 114964 transitions. Word has length 275 [2018-10-26 19:18:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:18:29,174 INFO L481 AbstractCegarLoop]: Abstraction has 91995 states and 114964 transitions. [2018-10-26 19:18:29,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:18:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 91995 states and 114964 transitions. [2018-10-26 19:18:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-26 19:18:29,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:18:29,188 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:18:29,188 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:18:29,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:18:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1897309736, now seen corresponding path program 1 times [2018-10-26 19:18:29,189 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:18:29,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:18:29,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:29,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:29,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-10-26 19:18:29,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:18:29,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:18:29,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:18:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:18:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:18:29,697 INFO L87 Difference]: Start difference. First operand 91995 states and 114964 transitions. Second operand 4 states. [2018-10-26 19:18:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:18:43,235 INFO L93 Difference]: Finished difference Result 207672 states and 260835 transitions. [2018-10-26 19:18:43,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:18:43,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2018-10-26 19:18:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:18:43,412 INFO L225 Difference]: With dead ends: 207672 [2018-10-26 19:18:43,413 INFO L226 Difference]: Without dead ends: 116467 [2018-10-26 19:18:43,492 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 19:18:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116467 states. [2018-10-26 19:18:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116467 to 114843. [2018-10-26 19:18:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114843 states. [2018-10-26 19:18:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114843 states to 114843 states and 136063 transitions. [2018-10-26 19:18:44,877 INFO L78 Accepts]: Start accepts. Automaton has 114843 states and 136063 transitions. Word has length 332 [2018-10-26 19:18:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:18:44,878 INFO L481 AbstractCegarLoop]: Abstraction has 114843 states and 136063 transitions. [2018-10-26 19:18:44,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:18:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 114843 states and 136063 transitions. [2018-10-26 19:18:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-10-26 19:18:44,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:18:44,899 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:18:44,899 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:18:44,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:18:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash -387055667, now seen corresponding path program 1 times [2018-10-26 19:18:44,904 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:18:44,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:18:44,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:44,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:44,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 436 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-10-26 19:18:45,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:18:45,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 19:18:45,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 19:18:45,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 19:18:45,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:18:45,475 INFO L87 Difference]: Start difference. First operand 114843 states and 136063 transitions. Second operand 6 states. [2018-10-26 19:19:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:19:05,383 INFO L93 Difference]: Finished difference Result 289002 states and 341059 transitions. [2018-10-26 19:19:05,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 19:19:05,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 364 [2018-10-26 19:19:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:19:05,652 INFO L225 Difference]: With dead ends: 289002 [2018-10-26 19:19:05,652 INFO L226 Difference]: Without dead ends: 174949 [2018-10-26 19:19:05,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:19:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174949 states. [2018-10-26 19:19:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174949 to 172477. [2018-10-26 19:19:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172477 states. [2018-10-26 19:19:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172477 states to 172477 states and 201294 transitions. [2018-10-26 19:19:08,304 INFO L78 Accepts]: Start accepts. Automaton has 172477 states and 201294 transitions. Word has length 364 [2018-10-26 19:19:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:19:08,305 INFO L481 AbstractCegarLoop]: Abstraction has 172477 states and 201294 transitions. [2018-10-26 19:19:08,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 19:19:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 172477 states and 201294 transitions. [2018-10-26 19:19:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-10-26 19:19:08,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:19:08,325 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 19:19:08,326 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:19:08,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:19:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash 264369732, now seen corresponding path program 1 times [2018-10-26 19:19:08,326 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:19:08,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:19:08,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:08,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:19:08,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:19:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-26 19:19:08,791 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:19:08,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:19:08,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:19:08,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:19:08,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:19:08,793 INFO L87 Difference]: Start difference. First operand 172477 states and 201294 transitions. Second operand 4 states. [2018-10-26 19:19:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:19:23,597 INFO L93 Difference]: Finished difference Result 425285 states and 498316 transitions. [2018-10-26 19:19:23,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:19:23,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 367 [2018-10-26 19:19:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:19:23,956 INFO L225 Difference]: With dead ends: 425285 [2018-10-26 19:19:23,956 INFO L226 Difference]: Without dead ends: 253598 [2018-10-26 19:19:24,057 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 19:19:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253598 states. [2018-10-26 19:19:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253598 to 248862. [2018-10-26 19:19:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248862 states. [2018-10-26 19:19:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248862 states to 248862 states and 279429 transitions. [2018-10-26 19:19:27,394 INFO L78 Accepts]: Start accepts. Automaton has 248862 states and 279429 transitions. Word has length 367 [2018-10-26 19:19:27,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:19:27,395 INFO L481 AbstractCegarLoop]: Abstraction has 248862 states and 279429 transitions. [2018-10-26 19:19:27,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:19:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 248862 states and 279429 transitions. [2018-10-26 19:19:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-10-26 19:19:27,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:19:27,407 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:27,408 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:19:27,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:19:27,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1036730110, now seen corresponding path program 1 times [2018-10-26 19:19:27,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:19:27,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:19:27,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:27,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:19:27,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:19:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 436 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-10-26 19:19:27,639 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:19:27,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:19:27,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:19:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:19:27,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:19:27,641 INFO L87 Difference]: Start difference. First operand 248862 states and 279429 transitions. Second operand 3 states. [2018-10-26 19:19:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:19:36,105 INFO L93 Difference]: Finished difference Result 496121 states and 556598 transitions. [2018-10-26 19:19:36,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:19:36,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 393 [2018-10-26 19:19:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:19:36,440 INFO L225 Difference]: With dead ends: 496121 [2018-10-26 19:19:36,441 INFO L226 Difference]: Without dead ends: 244889 [2018-10-26 19:19:36,571 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 19:19:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244889 states. [2018-10-26 19:19:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244889 to 244881. [2018-10-26 19:19:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244881 states. [2018-10-26 19:19:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244881 states to 244881 states and 265462 transitions. [2018-10-26 19:19:45,750 INFO L78 Accepts]: Start accepts. Automaton has 244881 states and 265462 transitions. Word has length 393 [2018-10-26 19:19:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:19:45,750 INFO L481 AbstractCegarLoop]: Abstraction has 244881 states and 265462 transitions. [2018-10-26 19:19:45,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:19:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 244881 states and 265462 transitions. [2018-10-26 19:19:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-10-26 19:19:45,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:19:45,758 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:45,758 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:19:45,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:19:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash -811495877, now seen corresponding path program 1 times [2018-10-26 19:19:45,759 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:19:45,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:19:45,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:45,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:19:45,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:19:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-26 19:19:46,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:19:46,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:19:46,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:19:46,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:19:46,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:19:46,146 INFO L87 Difference]: Start difference. First operand 244881 states and 265462 transitions. Second operand 4 states. [2018-10-26 19:19:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:19:58,979 INFO L93 Difference]: Finished difference Result 533134 states and 578208 transitions. [2018-10-26 19:19:58,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:19:58,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2018-10-26 19:19:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:19:59,382 INFO L225 Difference]: With dead ends: 533134 [2018-10-26 19:19:59,383 INFO L226 Difference]: Without dead ends: 289043 [2018-10-26 19:19:59,518 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 19:19:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289043 states. [2018-10-26 19:20:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289043 to 272440. [2018-10-26 19:20:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272440 states. [2018-10-26 19:20:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272440 states to 272440 states and 292780 transitions. [2018-10-26 19:20:03,436 INFO L78 Accepts]: Start accepts. Automaton has 272440 states and 292780 transitions. Word has length 396 [2018-10-26 19:20:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:20:03,437 INFO L481 AbstractCegarLoop]: Abstraction has 272440 states and 292780 transitions. [2018-10-26 19:20:03,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:20:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 272440 states and 292780 transitions. [2018-10-26 19:20:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-10-26 19:20:03,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:20:03,447 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 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] [2018-10-26 19:20:03,447 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:20:03,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:20:03,448 INFO L82 PathProgramCache]: Analyzing trace with hash 713610285, now seen corresponding path program 1 times [2018-10-26 19:20:03,448 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:20:03,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:20:03,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:20:03,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:20:03,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:20:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:20:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 383 proven. 110 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-10-26 19:20:04,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:20:04,945 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:20:04,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:20:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:20:05,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:20:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-10-26 19:20:05,204 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:20:05,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-26 19:20:05,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 19:20:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 19:20:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-26 19:20:05,206 INFO L87 Difference]: Start difference. First operand 272440 states and 292780 transitions. Second operand 8 states. Received shutdown request... [2018-10-26 19:20:31,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 19:20:31,411 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 19:20:31,416 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 19:20:31,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:20:31 BoogieIcfgContainer [2018-10-26 19:20:31,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 19:20:31,417 INFO L168 Benchmark]: Toolchain (without parser) took 227007.10 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -667.7 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-26 19:20:31,418 INFO L168 Benchmark]: CDTParser took 0.22 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 19:20:31,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2405.58 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: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:31,419 INFO L168 Benchmark]: Boogie Procedure Inliner took 889.18 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 817.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:31,420 INFO L168 Benchmark]: Boogie Preprocessor took 597.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 82.4 MB). Peak memory consumption was 82.4 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:31,421 INFO L168 Benchmark]: RCFGBuilder took 14296.74 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 235.4 MB). Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 40.2 MB). Peak memory consumption was 584.9 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:31,422 INFO L168 Benchmark]: TraceAbstraction took 208812.74 ms. Allocated memory was 2.6 GB in the beginning and 4.7 GB in the end (delta: 2.1 GB). Free memory was 2.0 GB in the beginning and 2.1 GB in the end (delta: -28.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-26 19:20:31,428 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 2405.58 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: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 889.18 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 817.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 597.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 82.4 MB). Peak memory consumption was 82.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14296.74 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 235.4 MB). Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 40.2 MB). Peak memory consumption was 584.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208812.74 ms. Allocated memory was 2.6 GB in the beginning and 4.7 GB in the end (delta: 2.1 GB). Free memory was 2.0 GB in the beginning and 2.1 GB in the end (delta: -28.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 102). Cancelled while BasicCegarLoop was constructing difference of abstraction (272440states) and FLOYD_HOARE automaton (currently 13 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (270818 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 208.7s OverallTime, 11 OverallIterations, 5 TraceHistogramMax, 178.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8020 SDtfs, 38602 SDslu, 3480 SDs, 0 SdLazy, 68484 SolverSat, 18358 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 141.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 900 GetRequests, 857 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=272440occurred in iteration=10, 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: 23.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 70038 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 3953 NumberOfCodeBlocks, 3953 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 3939 ConstructedInterpolants, 0 QuantifiedInterpolants, 4341444 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1185 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 14 InterpolantComputations, 11 PerfectInterpolantSequences, 4113/4231 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown