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/Problem15_label33_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:18:53,358 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:18:53,360 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:18:53,373 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:18:53,373 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:18:53,374 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:18:53,376 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:18:53,377 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:18:53,379 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:18:53,381 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:18:53,384 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:18:53,385 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:18:53,386 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:18:53,387 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:18:53,390 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:18:53,391 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:18:53,392 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:18:53,394 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:18:53,396 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:18:53,397 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:18:53,398 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:18:53,400 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:18:53,402 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 14:18:53,403 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 14:18:53,403 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 14:18:53,404 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 14:18:53,405 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 14:18:53,405 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 14:18:53,406 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 14:18:53,407 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 14:18:53,408 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 14:18:53,408 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 14:18:53,408 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 14:18:53,409 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 14:18:53,410 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 14:18:53,410 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 14:18:53,411 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 14:18:53,437 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:18:53,437 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:18:53,438 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:18:53,438 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:18:53,439 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:18:53,439 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:18:53,439 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:18:53,439 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:18:53,439 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:18:53,440 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:18:53,440 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:18:53,440 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:18:53,440 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:18:53,440 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:18:53,441 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:18:53,441 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:18:53,442 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:18:53,442 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:18:53,442 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:18:53,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:18:53,442 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:18:53,443 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:18:53,443 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:18:53,443 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:18:53,443 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:18:53,443 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:18:53,444 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:18:53,444 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:18:53,495 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:18:53,508 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:18:53,512 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:18:53,514 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:18:53,514 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:18:53,515 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33_false-unreach-call.c [2018-10-24 14:18:53,581 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/80a79d43d/3ce355c1e1cc44fa98ba9d730385acf4/FLAG9553ae79b [2018-10-24 14:18:54,237 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:18:54,240 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label33_false-unreach-call.c [2018-10-24 14:18:54,261 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/80a79d43d/3ce355c1e1cc44fa98ba9d730385acf4/FLAG9553ae79b [2018-10-24 14:18:54,283 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/80a79d43d/3ce355c1e1cc44fa98ba9d730385acf4 [2018-10-24 14:18:54,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:18:54,297 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:18:54,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:18:54,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:18:54,303 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:18:54,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:18:54" (1/1) ... [2018-10-24 14:18:54,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69b4ec6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:54, skipping insertion in model container [2018-10-24 14:18:54,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:18:54" (1/1) ... [2018-10-24 14:18:54,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:18:54,425 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:18:55,297 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:18:55,302 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:18:55,636 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:18:55,656 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:18:55,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55 WrapperNode [2018-10-24 14:18:55,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:18:55,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:18:55,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:18:55,659 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:18:55,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:55,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:56,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:18:56,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:18:56,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:18:56,045 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:18:56,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:56,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:56,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:56,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:56,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:56,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:56,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... [2018-10-24 14:18:56,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:18:56,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:18:56,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:18:56,267 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:18:56,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:18:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:18:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:18:56,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:19:06,619 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:19:06,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:19:06 BoogieIcfgContainer [2018-10-24 14:19:06,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:19:06,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:19:06,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:19:06,625 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:19:06,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:18:54" (1/3) ... [2018-10-24 14:19:06,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34526e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:19:06, skipping insertion in model container [2018-10-24 14:19:06,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:18:55" (2/3) ... [2018-10-24 14:19:06,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34526e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:19:06, skipping insertion in model container [2018-10-24 14:19:06,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:19:06" (3/3) ... [2018-10-24 14:19:06,629 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label33_false-unreach-call.c [2018-10-24 14:19:06,640 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:19:06,648 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:19:06,666 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:19:06,706 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:19:06,707 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:19:06,707 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:19:06,708 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:19:06,708 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:19:06,708 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:19:06,708 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:19:06,708 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:19:06,708 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:19:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-24 14:19:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 14:19:06,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:19:06,746 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] [2018-10-24 14:19:06,749 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:19:06,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:19:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash -314381782, now seen corresponding path program 1 times [2018-10-24 14:19:06,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:19:06,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:19:06,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:06,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:19:06,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:19:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:19:07,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:19:07,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:19:07,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:19:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:19:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:19:07,181 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-24 14:19:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:19:16,596 INFO L93 Difference]: Finished difference Result 1510 states and 2778 transitions. [2018-10-24 14:19:16,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:19:16,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-10-24 14:19:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:19:16,629 INFO L225 Difference]: With dead ends: 1510 [2018-10-24 14:19:16,629 INFO L226 Difference]: Without dead ends: 1078 [2018-10-24 14:19:16,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:19:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2018-10-24 14:19:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 742. [2018-10-24 14:19:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2018-10-24 14:19:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1239 transitions. [2018-10-24 14:19:16,752 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1239 transitions. Word has length 23 [2018-10-24 14:19:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:19:16,753 INFO L481 AbstractCegarLoop]: Abstraction has 742 states and 1239 transitions. [2018-10-24 14:19:16,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:19:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1239 transitions. [2018-10-24 14:19:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-24 14:19:16,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:19:16,757 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:19:16,758 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:19:16,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:19:16,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1825296091, now seen corresponding path program 1 times [2018-10-24 14:19:16,759 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:19:16,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:19:16,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:16,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:19:16,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:19:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:19:17,188 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:19:17,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:19:17,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:19:17,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:19:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:19:17,192 INFO L87 Difference]: Start difference. First operand 742 states and 1239 transitions. Second operand 4 states. [2018-10-24 14:19:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:19:24,365 INFO L93 Difference]: Finished difference Result 2749 states and 4685 transitions. [2018-10-24 14:19:24,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:19:24,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2018-10-24 14:19:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:19:24,377 INFO L225 Difference]: With dead ends: 2749 [2018-10-24 14:19:24,377 INFO L226 Difference]: Without dead ends: 2009 [2018-10-24 14:19:24,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:19:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2018-10-24 14:19:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1342. [2018-10-24 14:19:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2018-10-24 14:19:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2021 transitions. [2018-10-24 14:19:24,441 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2021 transitions. Word has length 92 [2018-10-24 14:19:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:19:24,442 INFO L481 AbstractCegarLoop]: Abstraction has 1342 states and 2021 transitions. [2018-10-24 14:19:24,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:19:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2021 transitions. [2018-10-24 14:19:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-24 14:19:24,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:19:24,446 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:19:24,447 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:19:24,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:19:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1044270609, now seen corresponding path program 1 times [2018-10-24 14:19:24,447 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:19:24,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:19:24,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:24,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:19:24,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:19:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:19:24,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:19:24,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 14:19:24,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:19:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:19:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:19:24,890 INFO L87 Difference]: Start difference. First operand 1342 states and 2021 transitions. Second operand 6 states. [2018-10-24 14:19:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:19:35,863 INFO L93 Difference]: Finished difference Result 5410 states and 8155 transitions. [2018-10-24 14:19:35,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:19:35,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-24 14:19:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:19:35,886 INFO L225 Difference]: With dead ends: 5410 [2018-10-24 14:19:35,886 INFO L226 Difference]: Without dead ends: 4070 [2018-10-24 14:19:35,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:19:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2018-10-24 14:19:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 3753. [2018-10-24 14:19:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3753 states. [2018-10-24 14:19:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 4926 transitions. [2018-10-24 14:19:35,966 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 4926 transitions. Word has length 100 [2018-10-24 14:19:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:19:35,967 INFO L481 AbstractCegarLoop]: Abstraction has 3753 states and 4926 transitions. [2018-10-24 14:19:35,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:19:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 4926 transitions. [2018-10-24 14:19:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-24 14:19:35,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:19:35,973 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:19:35,974 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:19:35,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:19:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1500239364, now seen corresponding path program 1 times [2018-10-24 14:19:35,974 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:19:35,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:19:35,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:35,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:19:35,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:19:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:19:36,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:19:36,515 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:19:36,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:19:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:19:36,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:19:37,292 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-10-24 14:19:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 41 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:19:37,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:19:37,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2018-10-24 14:19:37,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 14:19:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 14:19:37,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:19:37,431 INFO L87 Difference]: Start difference. First operand 3753 states and 4926 transitions. Second operand 12 states. [2018-10-24 14:19:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:19:55,921 INFO L93 Difference]: Finished difference Result 12338 states and 16539 transitions. [2018-10-24 14:19:55,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 14:19:55,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2018-10-24 14:19:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:19:55,950 INFO L225 Difference]: With dead ends: 12338 [2018-10-24 14:19:55,951 INFO L226 Difference]: Without dead ends: 6160 [2018-10-24 14:19:55,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2018-10-24 14:19:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2018-10-24 14:19:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5550. [2018-10-24 14:19:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5550 states. [2018-10-24 14:19:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 6502 transitions. [2018-10-24 14:19:56,060 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 6502 transitions. Word has length 192 [2018-10-24 14:19:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:19:56,060 INFO L481 AbstractCegarLoop]: Abstraction has 5550 states and 6502 transitions. [2018-10-24 14:19:56,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 14:19:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 6502 transitions. [2018-10-24 14:19:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-24 14:19:56,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:19:56,066 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:19:56,066 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:19:56,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:19:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2051937574, now seen corresponding path program 1 times [2018-10-24 14:19:56,067 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:19:56,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:19:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:56,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:19:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:19:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:19:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:19:56,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:19:56,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:19:56,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:19:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:19:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:19:56,534 INFO L87 Difference]: Start difference. First operand 5550 states and 6502 transitions. Second operand 4 states. [2018-10-24 14:20:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:20:01,774 INFO L93 Difference]: Finished difference Result 16203 states and 19528 transitions. [2018-10-24 14:20:01,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:20:01,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2018-10-24 14:20:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:20:01,813 INFO L225 Difference]: With dead ends: 16203 [2018-10-24 14:20:01,813 INFO L226 Difference]: Without dead ends: 10655 [2018-10-24 14:20:01,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:20:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10655 states. [2018-10-24 14:20:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10655 to 10348. [2018-10-24 14:20:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10348 states. [2018-10-24 14:20:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10348 states to 10348 states and 12026 transitions. [2018-10-24 14:20:01,991 INFO L78 Accepts]: Start accepts. Automaton has 10348 states and 12026 transitions. Word has length 306 [2018-10-24 14:20:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:20:01,992 INFO L481 AbstractCegarLoop]: Abstraction has 10348 states and 12026 transitions. [2018-10-24 14:20:01,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:20:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 10348 states and 12026 transitions. [2018-10-24 14:20:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2018-10-24 14:20:02,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:20:02,007 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:20:02,007 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:20:02,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:20:02,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1504010767, now seen corresponding path program 1 times [2018-10-24 14:20:02,008 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:20:02,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:20:02,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:02,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:02,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:02,738 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2018-10-24 14:20:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 209 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-24 14:20:02,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:20:02,876 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:20:02,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:03,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:20:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 14:20:03,189 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:20:03,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-10-24 14:20:03,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:20:03,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:20:03,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:20:03,191 INFO L87 Difference]: Start difference. First operand 10348 states and 12026 transitions. Second operand 7 states. [2018-10-24 14:20:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:20:13,566 INFO L93 Difference]: Finished difference Result 28605 states and 33442 transitions. [2018-10-24 14:20:13,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 14:20:13,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 479 [2018-10-24 14:20:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:20:13,615 INFO L225 Difference]: With dead ends: 28605 [2018-10-24 14:20:13,615 INFO L226 Difference]: Without dead ends: 18259 [2018-10-24 14:20:13,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 484 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:20:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18259 states. [2018-10-24 14:20:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18259 to 15039. [2018-10-24 14:20:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15039 states. [2018-10-24 14:20:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15039 states to 15039 states and 17475 transitions. [2018-10-24 14:20:13,928 INFO L78 Accepts]: Start accepts. Automaton has 15039 states and 17475 transitions. Word has length 479 [2018-10-24 14:20:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:20:13,929 INFO L481 AbstractCegarLoop]: Abstraction has 15039 states and 17475 transitions. [2018-10-24 14:20:13,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:20:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 15039 states and 17475 transitions. [2018-10-24 14:20:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2018-10-24 14:20:13,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:20:13,954 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:20:13,955 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:20:13,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:20:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash 774888924, now seen corresponding path program 1 times [2018-10-24 14:20:13,955 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:20:13,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:20:13,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:13,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:13,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2018-10-24 14:20:14,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:20:14,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:20:14,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:20:14,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:20:14,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:20:14,462 INFO L87 Difference]: Start difference. First operand 15039 states and 17475 transitions. Second operand 3 states. [2018-10-24 14:20:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:20:17,530 INFO L93 Difference]: Finished difference Result 30374 states and 35301 transitions. [2018-10-24 14:20:17,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:20:17,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 623 [2018-10-24 14:20:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:20:17,559 INFO L225 Difference]: With dead ends: 30374 [2018-10-24 14:20:17,559 INFO L226 Difference]: Without dead ends: 15337 [2018-10-24 14:20:17,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:20:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15337 states. [2018-10-24 14:20:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15337 to 15037. [2018-10-24 14:20:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15037 states. [2018-10-24 14:20:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15037 states to 15037 states and 17471 transitions. [2018-10-24 14:20:17,801 INFO L78 Accepts]: Start accepts. Automaton has 15037 states and 17471 transitions. Word has length 623 [2018-10-24 14:20:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:20:17,802 INFO L481 AbstractCegarLoop]: Abstraction has 15037 states and 17471 transitions. [2018-10-24 14:20:17,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:20:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 15037 states and 17471 transitions. [2018-10-24 14:20:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-10-24 14:20:17,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:20:17,830 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:20:17,830 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:20:17,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:20:17,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1714846665, now seen corresponding path program 1 times [2018-10-24 14:20:17,831 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:20:17,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:20:17,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:17,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:17,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-10-24 14:20:18,497 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:20:18,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:20:18,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:20:18,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:20:18,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:20:18,499 INFO L87 Difference]: Start difference. First operand 15037 states and 17471 transitions. Second operand 3 states. [2018-10-24 14:20:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:20:21,647 INFO L93 Difference]: Finished difference Result 40034 states and 46470 transitions. [2018-10-24 14:20:21,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:20:21,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 651 [2018-10-24 14:20:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:20:21,695 INFO L225 Difference]: With dead ends: 40034 [2018-10-24 14:20:21,695 INFO L226 Difference]: Without dead ends: 24999 [2018-10-24 14:20:21,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:20:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24999 states. [2018-10-24 14:20:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24999 to 24999. [2018-10-24 14:20:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24999 states. [2018-10-24 14:20:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24999 states to 24999 states and 28442 transitions. [2018-10-24 14:20:22,406 INFO L78 Accepts]: Start accepts. Automaton has 24999 states and 28442 transitions. Word has length 651 [2018-10-24 14:20:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:20:22,407 INFO L481 AbstractCegarLoop]: Abstraction has 24999 states and 28442 transitions. [2018-10-24 14:20:22,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:20:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 24999 states and 28442 transitions. [2018-10-24 14:20:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2018-10-24 14:20:22,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:20:22,449 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:20:22,449 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:20:22,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:20:22,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1598683598, now seen corresponding path program 1 times [2018-10-24 14:20:22,451 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:20:22,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:20:22,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:22,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:22,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2018-10-24 14:20:23,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:20:23,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:20:23,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:20:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:20:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:20:23,161 INFO L87 Difference]: Start difference. First operand 24999 states and 28442 transitions. Second operand 3 states. [2018-10-24 14:20:28,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:20:28,286 INFO L93 Difference]: Finished difference Result 55182 states and 62775 transitions. [2018-10-24 14:20:28,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:20:28,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 697 [2018-10-24 14:20:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:20:28,337 INFO L225 Difference]: With dead ends: 55182 [2018-10-24 14:20:28,337 INFO L226 Difference]: Without dead ends: 30185 [2018-10-24 14:20:28,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:20:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30185 states. [2018-10-24 14:20:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30185 to 29564. [2018-10-24 14:20:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29564 states. [2018-10-24 14:20:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29564 states to 29564 states and 33248 transitions. [2018-10-24 14:20:28,732 INFO L78 Accepts]: Start accepts. Automaton has 29564 states and 33248 transitions. Word has length 697 [2018-10-24 14:20:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:20:28,734 INFO L481 AbstractCegarLoop]: Abstraction has 29564 states and 33248 transitions. [2018-10-24 14:20:28,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:20:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 29564 states and 33248 transitions. [2018-10-24 14:20:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2018-10-24 14:20:28,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:20:28,766 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:20:28,766 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:20:28,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:20:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash -597118852, now seen corresponding path program 1 times [2018-10-24 14:20:28,767 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:20:28,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:20:28,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:28,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:28,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:20:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:29,454 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 14:20:29,934 WARN L179 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2018-10-24 14:20:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 572 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-10-24 14:20:31,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:20:31,344 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:20:31,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:20:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:20:31,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:20:31,832 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2018-10-24 14:20:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 572 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-10-24 14:20:33,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:20:33,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3] total 11 [2018-10-24 14:20:33,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 14:20:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 14:20:33,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:20:33,043 INFO L87 Difference]: Start difference. First operand 29564 states and 33248 transitions. Second operand 12 states. Received shutdown request... [2018-10-24 14:23:13,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 14:23:13,787 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:23:13,793 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:23:13,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:23:13 BoogieIcfgContainer [2018-10-24 14:23:13,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:23:13,795 INFO L168 Benchmark]: Toolchain (without parser) took 259498.57 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 180.4 MB. Max. memory is 7.1 GB. [2018-10-24 14:23:13,796 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 14:23:13,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1359.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-24 14:23:13,798 INFO L168 Benchmark]: Boogie Procedure Inliner took 386.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 763.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -881.6 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-24 14:23:13,798 INFO L168 Benchmark]: Boogie Preprocessor took 221.27 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2018-10-24 14:23:13,799 INFO L168 Benchmark]: RCFGBuilder took 10353.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 311.7 MB). Peak memory consumption was 311.7 MB. Max. memory is 7.1 GB. [2018-10-24 14:23:13,800 INFO L168 Benchmark]: TraceAbstraction took 247172.79 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.4 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 14:23:13,805 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 1359.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 386.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 763.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -881.6 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 221.27 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10353.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 311.7 MB). Peak memory consumption was 311.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247172.79 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.4 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 73). Cancelled while BasicCegarLoop was constructing difference of abstraction (29564states) and FLOYD_HOARE automaton (currently 8 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (60959 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 247.0s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 234.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2567 SDtfs, 16674 SDslu, 2093 SDs, 0 SdLazy, 30973 SolverSat, 5410 SolverUnsat, 77 SolverUnknown, 0 SolverNotchecked, 223.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1468 GetRequests, 1402 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29564occurred in iteration=9, 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: 2.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 6378 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 5276 NumberOfCodeBlocks, 5276 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 5263 ConstructedInterpolants, 108 QuantifiedInterpolants, 11459818 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1709 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 4555/4851 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown