java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label02_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:14:19,028 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:14:19,030 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:14:19,042 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:14:19,042 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:14:19,044 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:14:19,045 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:14:19,047 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:14:19,048 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:14:19,049 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:14:19,050 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:14:19,050 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:14:19,051 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:14:19,052 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:14:19,053 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:14:19,054 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:14:19,055 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:14:19,057 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:14:19,059 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:14:19,061 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:14:19,062 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:14:19,063 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:14:19,066 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:14:19,066 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:14:19,066 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:14:19,067 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:14:19,068 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:14:19,069 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:14:19,070 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:14:19,071 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:14:19,071 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:14:19,072 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:14:19,072 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:14:19,073 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:14:19,074 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:14:19,074 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:14:19,075 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 21:14:19,089 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:14:19,090 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:14:19,093 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:14:19,093 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:14:19,094 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:14:19,094 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:14:19,094 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:14:19,094 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:14:19,094 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:14:19,095 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:14:19,095 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:14:19,095 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:14:19,096 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:14:19,096 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:14:19,096 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:14:19,096 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:14:19,096 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:14:19,096 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:14:19,097 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:14:19,097 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:14:19,097 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:14:19,097 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:14:19,097 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:14:19,098 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:14:19,099 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:14:19,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:14:19,099 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:14:19,100 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 21:14:19,154 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:14:19,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:14:19,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:14:19,176 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:14:19,176 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:14:19,177 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label02_true-unreach-call.c [2018-10-26 21:14:19,228 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bb9b4f048/fb7fdb8eea7f4257bed6992a869cea8e/FLAGf4433bd66 [2018-10-26 21:14:19,930 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:14:19,931 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label02_true-unreach-call.c [2018-10-26 21:14:19,959 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bb9b4f048/fb7fdb8eea7f4257bed6992a869cea8e/FLAGf4433bd66 [2018-10-26 21:14:19,974 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bb9b4f048/fb7fdb8eea7f4257bed6992a869cea8e [2018-10-26 21:14:19,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:14:19,988 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:14:19,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:14:19,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:14:19,994 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:14:19,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:14:19" (1/1) ... [2018-10-26 21:14:19,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46764b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:19, skipping insertion in model container [2018-10-26 21:14:19,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:14:19" (1/1) ... [2018-10-26 21:14:20,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:14:20,170 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:14:21,391 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:14:21,396 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:14:22,000 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:14:22,034 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:14:22,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22 WrapperNode [2018-10-26 21:14:22,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:14:22,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:14:22,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:14:22,038 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:14:22,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:14:22,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:14:22,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:14:22,638 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:14:22,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... [2018-10-26 21:14:22,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:14:22,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:14:22,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:14:22,955 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:14:22,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:14:23,032 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 21:14:23,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:14:23,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:14:32,026 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:14:32,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:14:32 BoogieIcfgContainer [2018-10-26 21:14:32,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:14:32,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:14:32,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:14:32,035 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:14:32,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:14:19" (1/3) ... [2018-10-26 21:14:32,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3490728e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:14:32, skipping insertion in model container [2018-10-26 21:14:32,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:22" (2/3) ... [2018-10-26 21:14:32,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3490728e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:14:32, skipping insertion in model container [2018-10-26 21:14:32,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:14:32" (3/3) ... [2018-10-26 21:14:32,040 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label02_true-unreach-call.c [2018-10-26 21:14:32,051 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:14:32,061 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:14:32,079 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:14:32,122 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:14:32,123 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:14:32,123 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:14:32,123 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:14:32,123 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:14:32,124 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:14:32,124 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:14:32,124 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:14:32,124 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:14:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-26 21:14:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-26 21:14:32,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:14:32,189 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:14:32,192 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:14:32,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:14:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash 265969354, now seen corresponding path program 1 times [2018-10-26 21:14:32,201 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:14:32,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:14:32,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:14:32,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:14:32,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:14:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:14:32,702 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-26 21:14:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:14:32,729 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:14:32,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:14:32,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:14:32,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:14:32,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:14:32,753 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-26 21:14:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:14:47,621 INFO L93 Difference]: Finished difference Result 3146 states and 6134 transitions. [2018-10-26 21:14:47,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:14:47,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-10-26 21:14:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:14:47,665 INFO L225 Difference]: With dead ends: 3146 [2018-10-26 21:14:47,666 INFO L226 Difference]: Without dead ends: 2320 [2018-10-26 21:14:47,673 INFO L605 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 [2018-10-26 21:14:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2018-10-26 21:14:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2018-10-26 21:14:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2018-10-26 21:14:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3858 transitions. [2018-10-26 21:14:47,845 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3858 transitions. Word has length 63 [2018-10-26 21:14:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:14:47,846 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 3858 transitions. [2018-10-26 21:14:47,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:14:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3858 transitions. [2018-10-26 21:14:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-26 21:14:47,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:14:47,859 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:14:47,860 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:14:47,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:14:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash -104630118, now seen corresponding path program 1 times [2018-10-26 21:14:47,860 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:14:47,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:14:47,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:14:47,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:14:47,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:14:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:14:48,464 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-10-26 21:14:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:14:48,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:14:48,678 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:14:48,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:14:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:14:48,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:14:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:14:48,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:14:48,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-26 21:14:48,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:14:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:14:48,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:14:48,915 INFO L87 Difference]: Start difference. First operand 2320 states and 3858 transitions. Second operand 7 states. [2018-10-26 21:14:50,655 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-10-26 21:15:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:15:15,865 INFO L93 Difference]: Finished difference Result 15950 states and 27417 transitions. [2018-10-26 21:15:15,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 21:15:15,867 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2018-10-26 21:15:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:15:15,921 INFO L225 Difference]: With dead ends: 15950 [2018-10-26 21:15:15,921 INFO L226 Difference]: Without dead ends: 11373 [2018-10-26 21:15:15,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:15:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2018-10-26 21:15:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 6831. [2018-10-26 21:15:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6831 states. [2018-10-26 21:15:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6831 states to 6831 states and 8672 transitions. [2018-10-26 21:15:16,094 INFO L78 Accepts]: Start accepts. Automaton has 6831 states and 8672 transitions. Word has length 135 [2018-10-26 21:15:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:15:16,095 INFO L481 AbstractCegarLoop]: Abstraction has 6831 states and 8672 transitions. [2018-10-26 21:15:16,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:15:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 6831 states and 8672 transitions. [2018-10-26 21:15:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-26 21:15:16,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:15:16,104 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-26 21:15:16,104 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:15:16,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:15:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1810210403, now seen corresponding path program 1 times [2018-10-26 21:15:16,105 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:15:16,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:15:16,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:16,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:16,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:15:16,617 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:15:16,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:15:16,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:15:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:15:16,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:15:16,619 INFO L87 Difference]: Start difference. First operand 6831 states and 8672 transitions. Second operand 4 states. [2018-10-26 21:15:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:15:29,611 INFO L93 Difference]: Finished difference Result 26444 states and 33663 transitions. [2018-10-26 21:15:29,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:15:29,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 278 [2018-10-26 21:15:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:15:29,694 INFO L225 Difference]: With dead ends: 26444 [2018-10-26 21:15:29,694 INFO L226 Difference]: Without dead ends: 19615 [2018-10-26 21:15:29,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:15:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19615 states. [2018-10-26 21:15:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19615 to 19615. [2018-10-26 21:15:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19615 states. [2018-10-26 21:15:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19615 states to 19615 states and 24199 transitions. [2018-10-26 21:15:30,051 INFO L78 Accepts]: Start accepts. Automaton has 19615 states and 24199 transitions. Word has length 278 [2018-10-26 21:15:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:15:30,052 INFO L481 AbstractCegarLoop]: Abstraction has 19615 states and 24199 transitions. [2018-10-26 21:15:30,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:15:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 19615 states and 24199 transitions. [2018-10-26 21:15:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-26 21:15:30,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:15:30,060 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-26 21:15:30,061 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:15:30,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:15:30,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2107836289, now seen corresponding path program 1 times [2018-10-26 21:15:30,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:15:30,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:15:30,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:30,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:30,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:30,467 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:15:30,745 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-10-26 21:15:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-26 21:15:31,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:15:31,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:15:31,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:15:31,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:15:31,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:15:31,089 INFO L87 Difference]: Start difference. First operand 19615 states and 24199 transitions. Second operand 6 states. [2018-10-26 21:15:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:15:41,472 INFO L93 Difference]: Finished difference Result 57277 states and 70860 transitions. [2018-10-26 21:15:41,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:15:41,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 278 [2018-10-26 21:15:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:15:41,556 INFO L225 Difference]: With dead ends: 57277 [2018-10-26 21:15:41,557 INFO L226 Difference]: Without dead ends: 37664 [2018-10-26 21:15:41,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:15:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37664 states. [2018-10-26 21:15:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37664 to 37664. [2018-10-26 21:15:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37664 states. [2018-10-26 21:15:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37664 states to 37664 states and 44629 transitions. [2018-10-26 21:15:42,086 INFO L78 Accepts]: Start accepts. Automaton has 37664 states and 44629 transitions. Word has length 278 [2018-10-26 21:15:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:15:42,086 INFO L481 AbstractCegarLoop]: Abstraction has 37664 states and 44629 transitions. [2018-10-26 21:15:42,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:15:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 37664 states and 44629 transitions. [2018-10-26 21:15:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-10-26 21:15:42,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:15:42,098 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 21:15:42,098 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:15:42,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:15:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash 267648430, now seen corresponding path program 1 times [2018-10-26 21:15:42,099 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:15:42,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:15:42,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:42,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:42,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 121 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-26 21:15:42,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:15:42,883 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:15:42,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:43,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:15:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:15:43,126 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:15:43,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 21:15:43,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:15:43,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:15:43,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:15:43,129 INFO L87 Difference]: Start difference. First operand 37664 states and 44629 transitions. Second operand 4 states. [2018-10-26 21:15:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:15:51,207 INFO L93 Difference]: Finished difference Result 113739 states and 137973 transitions. [2018-10-26 21:15:51,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:15:51,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 311 [2018-10-26 21:15:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:15:51,342 INFO L225 Difference]: With dead ends: 113739 [2018-10-26 21:15:51,342 INFO L226 Difference]: Without dead ends: 76077 [2018-10-26 21:15:51,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:15:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76077 states. [2018-10-26 21:15:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76077 to 50448. [2018-10-26 21:15:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50448 states. [2018-10-26 21:15:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50448 states to 50448 states and 59938 transitions. [2018-10-26 21:15:52,424 INFO L78 Accepts]: Start accepts. Automaton has 50448 states and 59938 transitions. Word has length 311 [2018-10-26 21:15:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:15:52,425 INFO L481 AbstractCegarLoop]: Abstraction has 50448 states and 59938 transitions. [2018-10-26 21:15:52,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:15:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 50448 states and 59938 transitions. [2018-10-26 21:15:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-10-26 21:15:52,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:15:52,437 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:15:52,438 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:15:52,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:15:52,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2091924463, now seen corresponding path program 1 times [2018-10-26 21:15:52,438 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:15:52,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:15:52,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:52,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:52,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-26 21:15:52,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:15:52,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:15:52,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:15:52,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:15:52,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:15:52,765 INFO L87 Difference]: Start difference. First operand 50448 states and 59938 transitions. Second operand 3 states. [2018-10-26 21:15:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:15:57,432 INFO L93 Difference]: Finished difference Result 111422 states and 133221 transitions. [2018-10-26 21:15:57,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:15:57,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 365 [2018-10-26 21:15:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:15:57,552 INFO L225 Difference]: With dead ends: 111422 [2018-10-26 21:15:57,553 INFO L226 Difference]: Without dead ends: 60976 [2018-10-26 21:15:57,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:15:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60976 states. [2018-10-26 21:15:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60976 to 58720. [2018-10-26 21:15:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58720 states. [2018-10-26 21:15:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58720 states to 58720 states and 68483 transitions. [2018-10-26 21:15:58,244 INFO L78 Accepts]: Start accepts. Automaton has 58720 states and 68483 transitions. Word has length 365 [2018-10-26 21:15:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:15:58,245 INFO L481 AbstractCegarLoop]: Abstraction has 58720 states and 68483 transitions. [2018-10-26 21:15:58,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:15:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 58720 states and 68483 transitions. [2018-10-26 21:15:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-10-26 21:15:58,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:15:58,262 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:15:58,265 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:15:58,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:15:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash 850602081, now seen corresponding path program 1 times [2018-10-26 21:15:58,266 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:15:58,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:15:58,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:58,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:58,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-26 21:15:59,356 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:15:59,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:15:59,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:15:59,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:15:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:15:59,357 INFO L87 Difference]: Start difference. First operand 58720 states and 68483 transitions. Second operand 4 states. [2018-10-26 21:16:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:06,354 INFO L93 Difference]: Finished difference Result 119694 states and 139344 transitions. [2018-10-26 21:16:06,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:16:06,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2018-10-26 21:16:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:06,430 INFO L225 Difference]: With dead ends: 119694 [2018-10-26 21:16:06,430 INFO L226 Difference]: Without dead ends: 60976 [2018-10-26 21:16:06,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60976 states. [2018-10-26 21:16:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60976 to 60223. [2018-10-26 21:16:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60223 states. [2018-10-26 21:16:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60223 states to 60223 states and 68815 transitions. [2018-10-26 21:16:07,087 INFO L78 Accepts]: Start accepts. Automaton has 60223 states and 68815 transitions. Word has length 397 [2018-10-26 21:16:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:07,088 INFO L481 AbstractCegarLoop]: Abstraction has 60223 states and 68815 transitions. [2018-10-26 21:16:07,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:16:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 60223 states and 68815 transitions. [2018-10-26 21:16:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-10-26 21:16:07,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:07,100 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:07,100 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:07,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash -185181280, now seen corresponding path program 1 times [2018-10-26 21:16:07,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:07,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:07,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:07,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:07,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-26 21:16:07,582 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:16:07,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:16:07,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:16:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:16:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:16:07,583 INFO L87 Difference]: Start difference. First operand 60223 states and 68815 transitions. Second operand 3 states. [2018-10-26 21:16:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:13,254 INFO L93 Difference]: Finished difference Result 136988 states and 158243 transitions. [2018-10-26 21:16:13,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:16:13,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 404 [2018-10-26 21:16:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:13,346 INFO L225 Difference]: With dead ends: 136988 [2018-10-26 21:16:13,346 INFO L226 Difference]: Without dead ends: 76767 [2018-10-26 21:16:13,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:16:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76767 states. [2018-10-26 21:16:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76767 to 76767. [2018-10-26 21:16:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76767 states. [2018-10-26 21:16:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76767 states to 76767 states and 88455 transitions. [2018-10-26 21:16:14,039 INFO L78 Accepts]: Start accepts. Automaton has 76767 states and 88455 transitions. Word has length 404 [2018-10-26 21:16:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:14,040 INFO L481 AbstractCegarLoop]: Abstraction has 76767 states and 88455 transitions. [2018-10-26 21:16:14,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:16:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 76767 states and 88455 transitions. [2018-10-26 21:16:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2018-10-26 21:16:14,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:14,052 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:14,052 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:14,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1014413213, now seen corresponding path program 1 times [2018-10-26 21:16:14,053 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:14,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:14,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:14,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:14,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-26 21:16:14,533 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:16:14,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:16:14,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:16:14,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:16:14,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:14,535 INFO L87 Difference]: Start difference. First operand 76767 states and 88455 transitions. Second operand 4 states. [2018-10-26 21:16:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:23,356 INFO L93 Difference]: Finished difference Result 210684 states and 243695 transitions. [2018-10-26 21:16:23,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:16:23,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 421 [2018-10-26 21:16:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:23,504 INFO L225 Difference]: With dead ends: 210684 [2018-10-26 21:16:23,504 INFO L226 Difference]: Without dead ends: 127893 [2018-10-26 21:16:23,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127893 states. [2018-10-26 21:16:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127893 to 125637. [2018-10-26 21:16:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125637 states. [2018-10-26 21:16:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125637 states to 125637 states and 138432 transitions. [2018-10-26 21:16:24,632 INFO L78 Accepts]: Start accepts. Automaton has 125637 states and 138432 transitions. Word has length 421 [2018-10-26 21:16:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:24,633 INFO L481 AbstractCegarLoop]: Abstraction has 125637 states and 138432 transitions. [2018-10-26 21:16:24,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:16:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 125637 states and 138432 transitions. [2018-10-26 21:16:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-10-26 21:16:24,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:24,643 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:24,643 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:24,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1682051623, now seen corresponding path program 1 times [2018-10-26 21:16:24,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:24,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:24,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:24,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:24,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 316 proven. 61 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-26 21:16:25,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:16:25,154 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:16:25,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:25,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:16:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 316 proven. 61 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-26 21:16:25,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:16:25,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-26 21:16:25,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:16:25,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:16:25,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:16:25,602 INFO L87 Difference]: Start difference. First operand 125637 states and 138432 transitions. Second operand 6 states. [2018-10-26 21:16:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:43,701 INFO L93 Difference]: Finished difference Result 288128 states and 316849 transitions. [2018-10-26 21:16:43,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 21:16:43,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 425 [2018-10-26 21:16:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:43,896 INFO L225 Difference]: With dead ends: 288128 [2018-10-26 21:16:43,896 INFO L226 Difference]: Without dead ends: 161739 [2018-10-26 21:16:43,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 426 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:16:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161739 states. [2018-10-26 21:16:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161739 to 130900. [2018-10-26 21:16:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130900 states. [2018-10-26 21:16:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130900 states to 130900 states and 143705 transitions. [2018-10-26 21:16:46,007 INFO L78 Accepts]: Start accepts. Automaton has 130900 states and 143705 transitions. Word has length 425 [2018-10-26 21:16:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:46,008 INFO L481 AbstractCegarLoop]: Abstraction has 130900 states and 143705 transitions. [2018-10-26 21:16:46,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:16:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 130900 states and 143705 transitions. [2018-10-26 21:16:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-10-26 21:16:46,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:46,018 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:46,018 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:46,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1210384162, now seen corresponding path program 1 times [2018-10-26 21:16:46,018 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:46,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:46,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:46,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:46,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:46,763 WARN L179 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-10-26 21:16:47,188 WARN L179 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-26 21:16:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 317 proven. 143 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-26 21:16:47,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:16:47,578 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:16:47,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:47,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:16:48,277 WARN L179 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-10-26 21:16:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 405 proven. 55 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-26 21:16:48,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:16:48,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-10-26 21:16:48,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 21:16:48,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 21:16:48,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-26 21:16:48,943 INFO L87 Difference]: Start difference. First operand 130900 states and 143705 transitions. Second operand 10 states. [2018-10-26 21:17:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:17:21,580 INFO L93 Difference]: Finished difference Result 275334 states and 302591 transitions. [2018-10-26 21:17:21,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 21:17:21,580 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 452 [2018-10-26 21:17:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:17:22,541 INFO L225 Difference]: With dead ends: 275334 [2018-10-26 21:17:22,541 INFO L226 Difference]: Without dead ends: 139163 [2018-10-26 21:17:22,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 449 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2018-10-26 21:17:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139163 states. [2018-10-26 21:17:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139163 to 134651. [2018-10-26 21:17:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134651 states. [2018-10-26 21:17:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134651 states to 134651 states and 146638 transitions. [2018-10-26 21:17:23,841 INFO L78 Accepts]: Start accepts. Automaton has 134651 states and 146638 transitions. Word has length 452 [2018-10-26 21:17:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:17:23,842 INFO L481 AbstractCegarLoop]: Abstraction has 134651 states and 146638 transitions. [2018-10-26 21:17:23,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 21:17:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 134651 states and 146638 transitions. [2018-10-26 21:17:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2018-10-26 21:17:23,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:17:23,853 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:17:23,854 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:17:23,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:17:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash -815225925, now seen corresponding path program 1 times [2018-10-26 21:17:23,854 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:17:23,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:17:23,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:23,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:23,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 438 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-26 21:17:24,318 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:17:24,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:17:24,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:17:24,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:17:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:17:24,319 INFO L87 Difference]: Start difference. First operand 134651 states and 146638 transitions. Second operand 4 states. [2018-10-26 21:17:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:17:37,014 INFO L93 Difference]: Finished difference Result 281332 states and 306622 transitions. [2018-10-26 21:17:37,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:17:37,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2018-10-26 21:17:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:17:37,153 INFO L225 Difference]: With dead ends: 281332 [2018-10-26 21:17:37,153 INFO L226 Difference]: Without dead ends: 147435 [2018-10-26 21:17:37,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:17:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147435 states. [2018-10-26 21:17:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147435 to 147435. [2018-10-26 21:17:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147435 states. [2018-10-26 21:17:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147435 states to 147435 states and 158353 transitions. [2018-10-26 21:17:40,066 INFO L78 Accepts]: Start accepts. Automaton has 147435 states and 158353 transitions. Word has length 466 [2018-10-26 21:17:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:17:40,067 INFO L481 AbstractCegarLoop]: Abstraction has 147435 states and 158353 transitions. [2018-10-26 21:17:40,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:17:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 147435 states and 158353 transitions. [2018-10-26 21:17:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2018-10-26 21:17:40,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:17:40,079 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:17:40,080 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:17:40,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:17:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1564236026, now seen corresponding path program 1 times [2018-10-26 21:17:40,081 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:17:40,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:17:40,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:40,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:40,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 470 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-26 21:17:40,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:17:40,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:17:40,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:17:40,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:17:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:17:40,473 INFO L87 Difference]: Start difference. First operand 147435 states and 158353 transitions. Second operand 4 states. [2018-10-26 21:17:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:17:50,812 INFO L93 Difference]: Finished difference Result 294116 states and 315947 transitions. [2018-10-26 21:17:50,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:17:50,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2018-10-26 21:17:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:17:50,985 INFO L225 Difference]: With dead ends: 294116 [2018-10-26 21:17:50,986 INFO L226 Difference]: Without dead ends: 146682 [2018-10-26 21:17:51,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:17:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146682 states. [2018-10-26 21:17:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146682 to 144426. [2018-10-26 21:17:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144426 states. [2018-10-26 21:17:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144426 states to 144426 states and 153449 transitions. [2018-10-26 21:17:56,617 INFO L78 Accepts]: Start accepts. Automaton has 144426 states and 153449 transitions. Word has length 476 [2018-10-26 21:17:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:17:56,617 INFO L481 AbstractCegarLoop]: Abstraction has 144426 states and 153449 transitions. [2018-10-26 21:17:56,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:17:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 144426 states and 153449 transitions. [2018-10-26 21:17:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-10-26 21:17:56,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:17:56,628 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:17:56,628 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:17:56,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:17:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -921309682, now seen corresponding path program 1 times [2018-10-26 21:17:56,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:17:56,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:17:56,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:56,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:56,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-10-26 21:17:57,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:17:57,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:17:57,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:17:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:17:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:17:57,318 INFO L87 Difference]: Start difference. First operand 144426 states and 153449 transitions. Second operand 5 states. Received shutdown request... [2018-10-26 21:18:11,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:18:11,118 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 21:18:11,123 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 21:18:11,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:18:11 BoogieIcfgContainer [2018-10-26 21:18:11,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:18:11,124 INFO L168 Benchmark]: Toolchain (without parser) took 231137.50 ms. Allocated memory was 1.6 GB in the beginning and 4.4 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 3.6 GB in the end (delta: -2.1 GB). Peak memory consumption was 736.8 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:11,126 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 21:18:11,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2047.55 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:11,127 INFO L168 Benchmark]: Boogie Procedure Inliner took 599.80 ms. Allocated memory was 1.6 GB in the beginning and 2.4 GB in the end (delta: 821.6 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:11,128 INFO L168 Benchmark]: Boogie Preprocessor took 316.39 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:11,129 INFO L168 Benchmark]: RCFGBuilder took 9073.48 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 223.3 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -182.8 MB). Peak memory consumption was 637.3 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:11,130 INFO L168 Benchmark]: TraceAbstraction took 219094.15 ms. Allocated memory was 2.6 GB in the beginning and 4.4 GB in the end (delta: 1.8 GB). Free memory was 2.4 GB in the beginning and 3.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 639.4 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:11,135 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2047.55 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 599.80 ms. Allocated memory was 1.6 GB in the beginning and 2.4 GB in the end (delta: 821.6 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 316.39 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9073.48 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 223.3 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -182.8 MB). Peak memory consumption was 637.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219094.15 ms. Allocated memory was 2.6 GB in the beginning and 4.4 GB in the end (delta: 1.8 GB). Free memory was 2.4 GB in the beginning and 3.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 639.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 198]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 198). Cancelled while BasicCegarLoop was constructing difference of abstraction (144426states) and FLOYD_HOARE automaton (currently 5 states, 5 states before enhancement),while ReachableStatesComputation was computing reachable states (166618 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 219.0s OverallTime, 14 OverallIterations, 5 TraceHistogramMax, 189.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8475 SDtfs, 40087 SDslu, 1522 SDs, 0 SdLazy, 88824 SolverSat, 14951 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 153.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1403 GetRequests, 1339 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147435occurred in iteration=12, 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: 16.8s AutomataMinimizationTime, 13 MinimizatonAttempts, 73043 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 6294 NumberOfCodeBlocks, 6294 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 6276 ConstructedInterpolants, 0 QuantifiedInterpolants, 7657144 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1706 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 6270/6599 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown