java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-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_label23_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 19:10:52,611 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 19:10:52,613 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 19:10:52,625 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 19:10:52,626 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 19:10:52,627 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 19:10:52,628 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 19:10:52,630 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 19:10:52,632 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 19:10:52,633 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 19:10:52,634 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 19:10:52,634 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 19:10:52,637 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 19:10:52,638 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 19:10:52,639 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 19:10:52,640 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 19:10:52,645 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 19:10:52,648 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 19:10:52,650 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 19:10:52,652 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 19:10:52,653 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 19:10:52,654 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 19:10:52,657 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 19:10:52,657 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 19:10:52,657 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 19:10:52,658 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 19:10:52,659 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 19:10:52,660 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 19:10:52,664 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 19:10:52,665 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 19:10:52,666 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 19:10:52,666 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-06 19:10:52,667 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-06 19:10:52,667 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-06 19:10:52,668 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-06 19:10:52,669 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-06 19:10:52,670 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 19:10:52,704 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 19:10:52,704 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 19:10:52,705 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 19:10:52,706 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 19:10:52,707 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 19:10:52,707 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 19:10:52,707 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 19:10:52,708 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 19:10:52,708 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 19:10:52,708 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 19:10:52,708 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 19:10:52,708 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 19:10:52,709 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 19:10:52,709 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 19:10:52,709 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 19:10:52,709 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 19:10:52,709 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 19:10:52,710 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 19:10:52,710 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 19:10:52,710 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 19:10:52,710 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 19:10:52,710 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 19:10:52,711 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 19:10:52,711 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 19:10:52,711 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 19:10:52,711 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 19:10:52,711 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 19:10:52,712 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 19:10:52,781 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 19:10:52,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 19:10:52,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 19:10:52,806 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 19:10:52,806 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 19:10:52,807 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label23_false-unreach-call.c [2018-11-06 19:10:52,871 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e1e1be7/45b74aa9b1e04369a6895c08b715ceb5/FLAGdb786f4a0 [2018-11-06 19:10:53,653 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 19:10:53,654 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label23_false-unreach-call.c [2018-11-06 19:10:53,699 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e1e1be7/45b74aa9b1e04369a6895c08b715ceb5/FLAGdb786f4a0 [2018-11-06 19:10:53,722 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e1e1be7/45b74aa9b1e04369a6895c08b715ceb5 [2018-11-06 19:10:53,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 19:10:53,737 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 19:10:53,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 19:10:53,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 19:10:53,744 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 19:10:53,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:53" (1/1) ... [2018-11-06 19:10:53,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301511e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:53, skipping insertion in model container [2018-11-06 19:10:53,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:53" (1/1) ... [2018-11-06 19:10:53,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 19:10:53,964 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 19:10:55,579 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 19:10:55,586 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 19:10:56,323 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 19:10:56,359 INFO L193 MainTranslator]: Completed translation [2018-11-06 19:10:56,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56 WrapperNode [2018-11-06 19:10:56,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 19:10:56,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 19:10:56,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 19:10:56,361 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 19:10:56,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:56,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:57,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 19:10:57,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 19:10:57,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 19:10:57,180 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 19:10:57,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:57,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:57,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:57,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:57,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:57,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:57,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... [2018-11-06 19:10:57,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 19:10:57,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 19:10:57,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 19:10:57,860 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 19:10:57,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 19:10:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-06 19:10:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 19:10:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 19:11:08,930 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 19:11:08,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:11:08 BoogieIcfgContainer [2018-11-06 19:11:08,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 19:11:08,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 19:11:08,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 19:11:08,936 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 19:11:08,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:10:53" (1/3) ... [2018-11-06 19:11:08,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1312ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:11:08, skipping insertion in model container [2018-11-06 19:11:08,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:56" (2/3) ... [2018-11-06 19:11:08,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1312ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:11:08, skipping insertion in model container [2018-11-06 19:11:08,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:11:08" (3/3) ... [2018-11-06 19:11:08,940 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label23_false-unreach-call.c [2018-11-06 19:11:08,950 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 19:11:08,960 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 19:11:08,978 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 19:11:09,021 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 19:11:09,022 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 19:11:09,022 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 19:11:09,023 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 19:11:09,023 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 19:11:09,023 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 19:11:09,023 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 19:11:09,023 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 19:11:09,023 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 19:11:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-11-06 19:11:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 19:11:09,075 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:11:09,076 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:11:09,079 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:11:09,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:11:09,086 INFO L82 PathProgramCache]: Analyzing trace with hash 340357962, now seen corresponding path program 1 times [2018-11-06 19:11:09,088 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:11:09,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:11:09,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:09,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:09,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:11:09,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:11:09,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:11:09,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:11:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:11:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:11:09,511 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-11-06 19:11:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:11:23,665 INFO L93 Difference]: Finished difference Result 3863 states and 7261 transitions. [2018-11-06 19:11:23,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:11:23,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-11-06 19:11:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:11:23,713 INFO L225 Difference]: With dead ends: 3863 [2018-11-06 19:11:23,713 INFO L226 Difference]: Without dead ends: 2757 [2018-11-06 19:11:23,723 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:11:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-11-06 19:11:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2736. [2018-11-06 19:11:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2736 states. [2018-11-06 19:11:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4486 transitions. [2018-11-06 19:11:23,893 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4486 transitions. Word has length 14 [2018-11-06 19:11:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:11:23,893 INFO L480 AbstractCegarLoop]: Abstraction has 2736 states and 4486 transitions. [2018-11-06 19:11:23,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:11:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4486 transitions. [2018-11-06 19:11:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-06 19:11:23,900 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:11:23,900 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:11:23,900 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:11:23,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:11:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1382153005, now seen corresponding path program 1 times [2018-11-06 19:11:23,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:11:23,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:11:23,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:23,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:23,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:11:24,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:11:24,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:11:24,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:11:24,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:11:24,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:11:24,218 INFO L87 Difference]: Start difference. First operand 2736 states and 4486 transitions. Second operand 4 states. [2018-11-06 19:11:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:11:36,706 INFO L93 Difference]: Finished difference Result 10268 states and 17048 transitions. [2018-11-06 19:11:36,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:11:36,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2018-11-06 19:11:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:11:36,748 INFO L225 Difference]: With dead ends: 10268 [2018-11-06 19:11:36,749 INFO L226 Difference]: Without dead ends: 7534 [2018-11-06 19:11:36,755 INFO L604 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 [2018-11-06 19:11:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7534 states. [2018-11-06 19:11:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7534 to 7528. [2018-11-06 19:11:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7528 states. [2018-11-06 19:11:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 11328 transitions. [2018-11-06 19:11:36,906 INFO L78 Accepts]: Start accepts. Automaton has 7528 states and 11328 transitions. Word has length 101 [2018-11-06 19:11:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:11:36,907 INFO L480 AbstractCegarLoop]: Abstraction has 7528 states and 11328 transitions. [2018-11-06 19:11:36,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:11:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7528 states and 11328 transitions. [2018-11-06 19:11:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-06 19:11:36,910 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:11:36,911 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:11:36,911 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:11:36,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:11:36,912 INFO L82 PathProgramCache]: Analyzing trace with hash 246824780, now seen corresponding path program 1 times [2018-11-06 19:11:36,912 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:11:36,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:11:36,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:36,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:36,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:37,301 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-06 19:11:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:11:37,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:11:37,317 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 19:11:37,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:37,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:11:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:11:37,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:11:37,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-11-06 19:11:37,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 19:11:37,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 19:11:37,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-06 19:11:37,561 INFO L87 Difference]: Start difference. First operand 7528 states and 11328 transitions. Second operand 6 states. [2018-11-06 19:12:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:12:03,597 INFO L93 Difference]: Finished difference Result 57105 states and 87088 transitions. [2018-11-06 19:12:03,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 19:12:03,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2018-11-06 19:12:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:12:03,763 INFO L225 Difference]: With dead ends: 57105 [2018-11-06 19:12:03,763 INFO L226 Difference]: Without dead ends: 49579 [2018-11-06 19:12:03,782 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-11-06 19:12:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49579 states. [2018-11-06 19:12:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49579 to 49409. [2018-11-06 19:12:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49409 states. [2018-11-06 19:12:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49409 states to 49409 states and 67025 transitions. [2018-11-06 19:12:04,692 INFO L78 Accepts]: Start accepts. Automaton has 49409 states and 67025 transitions. Word has length 111 [2018-11-06 19:12:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:12:04,692 INFO L480 AbstractCegarLoop]: Abstraction has 49409 states and 67025 transitions. [2018-11-06 19:12:04,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 19:12:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 49409 states and 67025 transitions. [2018-11-06 19:12:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-11-06 19:12:04,713 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:12:04,713 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:12:04,714 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:12:04,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:12:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash -674539072, now seen corresponding path program 1 times [2018-11-06 19:12:04,714 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:12:04,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:12:04,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:04,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:12:04,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:12:05,340 WARN L179 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 6 [2018-11-06 19:12:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-06 19:12:05,410 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:12:05,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:12:05,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:12:05,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:12:05,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:12:05,412 INFO L87 Difference]: Start difference. First operand 49409 states and 67025 transitions. Second operand 4 states. [2018-11-06 19:12:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:12:14,481 INFO L93 Difference]: Finished difference Result 122514 states and 162273 transitions. [2018-11-06 19:12:14,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:12:14,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 248 [2018-11-06 19:12:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:12:14,638 INFO L225 Difference]: With dead ends: 122514 [2018-11-06 19:12:14,638 INFO L226 Difference]: Without dead ends: 73107 [2018-11-06 19:12:14,692 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:12:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73107 states. [2018-11-06 19:12:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73107 to 63593. [2018-11-06 19:12:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63593 states. [2018-11-06 19:12:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63593 states to 63593 states and 82894 transitions. [2018-11-06 19:12:15,684 INFO L78 Accepts]: Start accepts. Automaton has 63593 states and 82894 transitions. Word has length 248 [2018-11-06 19:12:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:12:15,685 INFO L480 AbstractCegarLoop]: Abstraction has 63593 states and 82894 transitions. [2018-11-06 19:12:15,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:12:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 63593 states and 82894 transitions. [2018-11-06 19:12:15,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-11-06 19:12:15,696 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:12:15,697 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:12:15,697 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:12:15,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:12:15,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1912931644, now seen corresponding path program 1 times [2018-11-06 19:12:15,699 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:12:15,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:12:15,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:15,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:12:15,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:12:16,202 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-11-06 19:12:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:12:16,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:12:16,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:12:16,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:12:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:12:16,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:12:16,268 INFO L87 Difference]: Start difference. First operand 63593 states and 82894 transitions. Second operand 4 states. [2018-11-06 19:12:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:12:27,484 INFO L93 Difference]: Finished difference Result 217008 states and 282948 transitions. [2018-11-06 19:12:27,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:12:27,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 257 [2018-11-06 19:12:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:12:27,643 INFO L225 Difference]: With dead ends: 217008 [2018-11-06 19:12:27,644 INFO L226 Difference]: Without dead ends: 124158 [2018-11-06 19:12:27,743 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:12:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124158 states. [2018-11-06 19:12:28,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124158 to 118635. [2018-11-06 19:12:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118635 states. [2018-11-06 19:12:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118635 states to 118635 states and 137509 transitions. [2018-11-06 19:12:29,016 INFO L78 Accepts]: Start accepts. Automaton has 118635 states and 137509 transitions. Word has length 257 [2018-11-06 19:12:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:12:29,016 INFO L480 AbstractCegarLoop]: Abstraction has 118635 states and 137509 transitions. [2018-11-06 19:12:29,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:12:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 118635 states and 137509 transitions. [2018-11-06 19:12:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-11-06 19:12:29,024 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:12:29,024 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-06 19:12:29,025 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:12:29,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:12:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash 967060679, now seen corresponding path program 1 times [2018-11-06 19:12:29,025 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:12:29,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:12:29,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:29,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:12:29,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:12:29,283 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-06 19:12:29,582 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-11-06 19:12:30,029 WARN L179 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2018-11-06 19:12:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-06 19:12:30,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:12:30,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:12:30,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 19:12:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 19:12:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:12:30,148 INFO L87 Difference]: Start difference. First operand 118635 states and 137509 transitions. Second operand 5 states. [2018-11-06 19:12:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:12:44,624 INFO L93 Difference]: Finished difference Result 246743 states and 285163 transitions. [2018-11-06 19:12:44,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 19:12:44,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 316 [2018-11-06 19:12:44,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:12:44,778 INFO L225 Difference]: With dead ends: 246743 [2018-11-06 19:12:44,779 INFO L226 Difference]: Without dead ends: 128898 [2018-11-06 19:12:44,852 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:12:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128898 states. [2018-11-06 19:12:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128898 to 128882. [2018-11-06 19:12:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128882 states. [2018-11-06 19:12:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128882 states to 128882 states and 148041 transitions. [2018-11-06 19:12:47,018 INFO L78 Accepts]: Start accepts. Automaton has 128882 states and 148041 transitions. Word has length 316 [2018-11-06 19:12:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:12:47,018 INFO L480 AbstractCegarLoop]: Abstraction has 128882 states and 148041 transitions. [2018-11-06 19:12:47,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 19:12:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 128882 states and 148041 transitions. [2018-11-06 19:12:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-11-06 19:12:47,029 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:12:47,030 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-06 19:12:47,030 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:12:47,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:12:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1010892797, now seen corresponding path program 1 times [2018-11-06 19:12:47,030 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:12:47,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:12:47,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:47,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:12:47,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:12:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-06 19:12:47,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:12:47,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:12:47,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:12:47,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:12:47,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:12:47,544 INFO L87 Difference]: Start difference. First operand 128882 states and 148041 transitions. Second operand 4 states. [2018-11-06 19:12:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:12:57,345 INFO L93 Difference]: Finished difference Result 286961 states and 331371 transitions. [2018-11-06 19:12:57,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:12:57,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 383 [2018-11-06 19:12:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:12:57,516 INFO L225 Difference]: With dead ends: 286961 [2018-11-06 19:12:57,517 INFO L226 Difference]: Without dead ends: 158869 [2018-11-06 19:12:57,558 INFO L604 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 [2018-11-06 19:12:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158869 states. [2018-11-06 19:12:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158869 to 148573. [2018-11-06 19:12:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148573 states. [2018-11-06 19:12:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148573 states to 148573 states and 165941 transitions. [2018-11-06 19:12:58,984 INFO L78 Accepts]: Start accepts. Automaton has 148573 states and 165941 transitions. Word has length 383 [2018-11-06 19:12:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:12:58,985 INFO L480 AbstractCegarLoop]: Abstraction has 148573 states and 165941 transitions. [2018-11-06 19:12:58,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:12:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 148573 states and 165941 transitions. [2018-11-06 19:12:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-11-06 19:12:58,991 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:12:58,991 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-06 19:12:58,992 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:12:58,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:12:58,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1970013513, now seen corresponding path program 1 times [2018-11-06 19:12:58,992 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:12:58,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:12:58,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:58,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:12:58,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:12:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:12:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-11-06 19:12:59,531 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:12:59,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:12:59,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:12:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:12:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:12:59,533 INFO L87 Difference]: Start difference. First operand 148573 states and 165941 transitions. Second operand 4 states. [2018-11-06 19:13:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:13:09,247 INFO L93 Difference]: Finished difference Result 321595 states and 360574 transitions. [2018-11-06 19:13:09,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:13:09,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 413 [2018-11-06 19:13:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:13:09,431 INFO L225 Difference]: With dead ends: 321595 [2018-11-06 19:13:09,431 INFO L226 Difference]: Without dead ends: 173812 [2018-11-06 19:13:09,514 INFO L604 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 [2018-11-06 19:13:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173812 states. [2018-11-06 19:13:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173812 to 171419. [2018-11-06 19:13:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171419 states. [2018-11-06 19:13:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171419 states to 171419 states and 186567 transitions. [2018-11-06 19:13:12,224 INFO L78 Accepts]: Start accepts. Automaton has 171419 states and 186567 transitions. Word has length 413 [2018-11-06 19:13:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:13:12,224 INFO L480 AbstractCegarLoop]: Abstraction has 171419 states and 186567 transitions. [2018-11-06 19:13:12,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:13:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 171419 states and 186567 transitions. [2018-11-06 19:13:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2018-11-06 19:13:12,234 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:13:12,234 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:13:12,235 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:13:12,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:13:12,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1924570743, now seen corresponding path program 1 times [2018-11-06 19:13:12,235 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:13:12,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:13:12,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:13:12,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:13:12,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:13:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:13:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2018-11-06 19:13:12,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:13:12,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:13:12,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 19:13:12,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 19:13:12,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 19:13:12,681 INFO L87 Difference]: Start difference. First operand 171419 states and 186567 transitions. Second operand 3 states. [2018-11-06 19:13:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:13:19,425 INFO L93 Difference]: Finished difference Result 341258 states and 371547 transitions. [2018-11-06 19:13:19,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 19:13:19,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2018-11-06 19:13:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:13:19,666 INFO L225 Difference]: With dead ends: 341258 [2018-11-06 19:13:19,666 INFO L226 Difference]: Without dead ends: 170629 [2018-11-06 19:13:19,765 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 19:13:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170629 states. [2018-11-06 19:13:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170629 to 158802. [2018-11-06 19:13:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158802 states. [2018-11-06 19:13:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158802 states to 158802 states and 169532 transitions. [2018-11-06 19:13:26,339 INFO L78 Accepts]: Start accepts. Automaton has 158802 states and 169532 transitions. Word has length 473 [2018-11-06 19:13:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:13:26,340 INFO L480 AbstractCegarLoop]: Abstraction has 158802 states and 169532 transitions. [2018-11-06 19:13:26,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 19:13:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 158802 states and 169532 transitions. [2018-11-06 19:13:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2018-11-06 19:13:26,380 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:13:26,380 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:13:26,381 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:13:26,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:13:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1267048652, now seen corresponding path program 1 times [2018-11-06 19:13:26,381 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:13:26,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:13:26,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:13:26,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:13:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:13:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:13:27,018 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-06 19:13:27,718 WARN L179 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-11-06 19:13:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 502 proven. 12 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2018-11-06 19:13:28,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:13:28,532 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 19:13:28,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:13:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:13:28,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:13:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 436 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2018-11-06 19:13:29,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:13:29,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-11-06 19:13:29,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 19:13:29,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 19:13:29,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-06 19:13:29,538 INFO L87 Difference]: Start difference. First operand 158802 states and 169532 transitions. Second operand 6 states. [2018-11-06 19:13:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:13:41,481 INFO L93 Difference]: Finished difference Result 458823 states and 492052 transitions. [2018-11-06 19:13:41,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 19:13:41,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 788 [2018-11-06 19:13:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:13:41,919 INFO L225 Difference]: With dead ends: 458823 [2018-11-06 19:13:41,919 INFO L226 Difference]: Without dead ends: 300811 [2018-11-06 19:13:42,044 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 788 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-11-06 19:13:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300811 states. [2018-11-06 19:13:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300811 to 188731. [2018-11-06 19:13:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188731 states. [2018-11-06 19:13:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188731 states to 188731 states and 199881 transitions. [2018-11-06 19:13:45,895 INFO L78 Accepts]: Start accepts. Automaton has 188731 states and 199881 transitions. Word has length 788 [2018-11-06 19:13:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:13:45,896 INFO L480 AbstractCegarLoop]: Abstraction has 188731 states and 199881 transitions. [2018-11-06 19:13:45,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 19:13:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 188731 states and 199881 transitions. [2018-11-06 19:13:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2018-11-06 19:13:45,924 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:13:45,925 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:13:45,925 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:13:45,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:13:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash -360233870, now seen corresponding path program 1 times [2018-11-06 19:13:45,926 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:13:45,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:13:45,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:13:45,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:13:45,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:13:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:13:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 654 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2018-11-06 19:13:46,431 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:13:46,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:13:46,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:13:46,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:13:46,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:13:46,432 INFO L87 Difference]: Start difference. First operand 188731 states and 199881 transitions. Second operand 4 states. [2018-11-06 19:13:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:13:57,111 INFO L93 Difference]: Finished difference Result 439052 states and 465837 transitions. [2018-11-06 19:13:57,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:13:57,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 788 [2018-11-06 19:13:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:13:57,439 INFO L225 Difference]: With dead ends: 439052 [2018-11-06 19:13:57,440 INFO L226 Difference]: Without dead ends: 251111 [2018-11-06 19:13:57,531 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:13:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251111 states. [2018-11-06 19:14:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251111 to 243901. [2018-11-06 19:14:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243901 states. [2018-11-06 19:14:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243901 states to 243901 states and 258789 transitions. [2018-11-06 19:14:00,287 INFO L78 Accepts]: Start accepts. Automaton has 243901 states and 258789 transitions. Word has length 788 [2018-11-06 19:14:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:14:00,288 INFO L480 AbstractCegarLoop]: Abstraction has 243901 states and 258789 transitions. [2018-11-06 19:14:00,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:14:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 243901 states and 258789 transitions. [2018-11-06 19:14:00,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2018-11-06 19:14:00,317 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:14:00,317 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:14:00,318 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:14:00,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:14:00,318 INFO L82 PathProgramCache]: Analyzing trace with hash 883708017, now seen corresponding path program 1 times [2018-11-06 19:14:00,318 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:14:00,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:14:00,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:14:00,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:14:00,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:14:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:14:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 480 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2018-11-06 19:14:01,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:14:01,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:14:01,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:14:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:14:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:14:01,835 INFO L87 Difference]: Start difference. First operand 243901 states and 258789 transitions. Second operand 4 states. [2018-11-06 19:14:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:14:10,147 INFO L93 Difference]: Finished difference Result 488573 states and 518825 transitions. [2018-11-06 19:14:10,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:14:10,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 818 [2018-11-06 19:14:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:14:10,490 INFO L225 Difference]: With dead ends: 488573 [2018-11-06 19:14:10,491 INFO L226 Difference]: Without dead ends: 245462 [2018-11-06 19:14:10,627 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:14:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245462 states. [2018-11-06 19:14:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245462 to 238366. [2018-11-06 19:14:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238366 states. [2018-11-06 19:14:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238366 states to 238366 states and 251588 transitions. [2018-11-06 19:14:13,795 INFO L78 Accepts]: Start accepts. Automaton has 238366 states and 251588 transitions. Word has length 818 [2018-11-06 19:14:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:14:13,796 INFO L480 AbstractCegarLoop]: Abstraction has 238366 states and 251588 transitions. [2018-11-06 19:14:13,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:14:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 238366 states and 251588 transitions. [2018-11-06 19:14:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1054 [2018-11-06 19:14:13,868 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:14:13,869 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:14:13,869 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:14:13,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:14:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash -144560775, now seen corresponding path program 1 times [2018-11-06 19:14:13,870 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:14:13,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:14:13,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:14:13,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:14:13,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:14:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:14:14,545 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-11-06 19:14:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 1113 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2018-11-06 19:14:19,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:14:19,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:14:19,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:14:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:14:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:14:19,112 INFO L87 Difference]: Start difference. First operand 238366 states and 251588 transitions. Second operand 4 states. [2018-11-06 19:14:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:14:28,682 INFO L93 Difference]: Finished difference Result 474341 states and 500663 transitions. [2018-11-06 19:14:28,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:14:28,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1053 [2018-11-06 19:14:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:14:28,973 INFO L225 Difference]: With dead ends: 474341 [2018-11-06 19:14:28,973 INFO L226 Difference]: Without dead ends: 233605 [2018-11-06 19:14:29,095 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:14:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233605 states. [2018-11-06 19:14:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233605 to 224927. [2018-11-06 19:14:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224927 states. [2018-11-06 19:14:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224927 states to 224927 states and 235370 transitions. [2018-11-06 19:14:32,049 INFO L78 Accepts]: Start accepts. Automaton has 224927 states and 235370 transitions. Word has length 1053 [2018-11-06 19:14:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:14:32,050 INFO L480 AbstractCegarLoop]: Abstraction has 224927 states and 235370 transitions. [2018-11-06 19:14:32,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:14:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 224927 states and 235370 transitions. Received shutdown request... [2018-11-06 19:14:32,118 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 19:14:32,122 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 19:14:32,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 07:14:32 BoogieIcfgContainer [2018-11-06 19:14:32,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 19:14:32,123 INFO L168 Benchmark]: Toolchain (without parser) took 218387.25 ms. Allocated memory was 1.5 GB in the beginning and 5.1 GB in the end (delta: 3.6 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-11-06 19:14:32,124 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. [2018-11-06 19:14:32,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2621.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-11-06 19:14:32,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 819.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 804.8 MB). Free memory was 1.1 GB in the beginning and 2.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 67.6 MB. Max. memory is 7.1 GB. [2018-11-06 19:14:32,126 INFO L168 Benchmark]: Boogie Preprocessor took 679.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 69.3 MB). Peak memory consumption was 69.3 MB. Max. memory is 7.1 GB. [2018-11-06 19:14:32,131 INFO L168 Benchmark]: RCFGBuilder took 11071.59 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 266.3 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -5.2 MB). Peak memory consumption was 580.9 MB. Max. memory is 7.1 GB. [2018-11-06 19:14:32,133 INFO L168 Benchmark]: TraceAbstraction took 203190.15 ms. Allocated memory was 2.6 GB in the beginning and 5.1 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 2.8 GB in the end (delta: -759.6 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-06 19:14:32,139 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 2621.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 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 819.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 804.8 MB). Free memory was 1.1 GB in the beginning and 2.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 67.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 679.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 69.3 MB). Peak memory consumption was 69.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11071.59 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 266.3 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -5.2 MB). Peak memory consumption was 580.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203190.15 ms. Allocated memory was 2.6 GB in the beginning and 5.1 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 2.8 GB in the end (delta: -759.6 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 51). Cancelled while IsEmpty was searching accepting run (input had 224927 states). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 203.1s OverallTime, 13 OverallIterations, 7 TraceHistogramMax, 157.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10302 SDtfs, 31666 SDslu, 3762 SDs, 0 SdLazy, 70574 SolverSat, 16910 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 119.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 969 GetRequests, 921 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243901occurred in iteration=11, 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: 29.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 174830 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 6662 NumberOfCodeBlocks, 6662 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 6647 ConstructedInterpolants, 0 QuantifiedInterpolants, 8822545 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1155 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 15 InterpolantComputations, 13 PerfectInterpolantSequences, 7609/7628 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown