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/Problem03_label13_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 13:17:05,897 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 13:17:05,899 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 13:17:05,911 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 13:17:05,911 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 13:17:05,912 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 13:17:05,914 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 13:17:05,916 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 13:17:05,918 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 13:17:05,919 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 13:17:05,920 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 13:17:05,920 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 13:17:05,921 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 13:17:05,922 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 13:17:05,923 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 13:17:05,924 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 13:17:05,925 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 13:17:05,927 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 13:17:05,929 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 13:17:05,931 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 13:17:05,932 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 13:17:05,933 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 13:17:05,936 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 13:17:05,951 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 13:17:05,977 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 13:17:05,977 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 13:17:05,979 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 13:17:05,979 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 13:17:05,980 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 13:17:05,980 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 13:17:05,980 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 13:17:05,980 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 13:17:05,981 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 13:17:05,982 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 13:17:05,982 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 13:17:05,982 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 13:17:05,982 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 13:17:05,983 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 13:17:05,983 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 13:17:05,983 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 13:17:05,983 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 13:17:05,983 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 13:17:05,984 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 13:17:05,985 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 13:17:05,985 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 13:17:05,985 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 13:17:05,985 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 13:17:05,986 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 13:17:05,986 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 13:17:05,986 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 13:17:05,986 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 13:17:05,987 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 13:17:06,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 13:17:06,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 13:17:06,073 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 13:17:06,074 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 13:17:06,075 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 13:17:06,076 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13_false-unreach-call.c [2018-10-24 13:17:06,136 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/57049eb55/ea84c0541cb241d6969b9166b73e0595/FLAG7eb819faa [2018-10-24 13:17:06,806 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 13:17:06,807 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13_false-unreach-call.c [2018-10-24 13:17:06,825 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/57049eb55/ea84c0541cb241d6969b9166b73e0595/FLAG7eb819faa [2018-10-24 13:17:06,841 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/57049eb55/ea84c0541cb241d6969b9166b73e0595 [2018-10-24 13:17:06,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 13:17:06,855 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 13:17:06,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 13:17:06,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 13:17:06,863 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 13:17:06,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:17:06" (1/1) ... [2018-10-24 13:17:06,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7203e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:06, skipping insertion in model container [2018-10-24 13:17:06,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:17:06" (1/1) ... [2018-10-24 13:17:06,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 13:17:06,965 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 13:17:07,873 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 13:17:07,879 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 13:17:08,142 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 13:17:08,169 INFO L193 MainTranslator]: Completed translation [2018-10-24 13:17:08,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08 WrapperNode [2018-10-24 13:17:08,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 13:17:08,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 13:17:08,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 13:17:08,171 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 13:17:08,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 13:17:08,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 13:17:08,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 13:17:08,503 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 13:17:08,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... [2018-10-24 13:17:08,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 13:17:08,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 13:17:08,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 13:17:08,645 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 13:17:08,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 13:17:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 13:17:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 13:17:08,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 13:17:14,735 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 13:17:14,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:17:14 BoogieIcfgContainer [2018-10-24 13:17:14,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 13:17:14,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 13:17:14,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 13:17:14,743 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 13:17:14,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:17:06" (1/3) ... [2018-10-24 13:17:14,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d04df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:17:14, skipping insertion in model container [2018-10-24 13:17:14,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:08" (2/3) ... [2018-10-24 13:17:14,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d04df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:17:14, skipping insertion in model container [2018-10-24 13:17:14,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:17:14" (3/3) ... [2018-10-24 13:17:14,747 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label13_false-unreach-call.c [2018-10-24 13:17:14,756 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 13:17:14,768 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 13:17:14,788 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 13:17:14,836 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 13:17:14,837 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 13:17:14,837 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 13:17:14,837 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 13:17:14,838 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 13:17:14,838 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 13:17:14,838 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 13:17:14,838 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 13:17:14,838 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 13:17:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-24 13:17:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-24 13:17:14,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:14,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:14,891 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:14,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -689951132, now seen corresponding path program 1 times [2018-10-24 13:17:14,898 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:14,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:14,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:14,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:14,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:15,750 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 13:17:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:15,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:15,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:15,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:17:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:17:15,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:15,858 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-24 13:17:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:20,326 INFO L93 Difference]: Finished difference Result 1027 states and 1865 transitions. [2018-10-24 13:17:20,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:17:20,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2018-10-24 13:17:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:20,362 INFO L225 Difference]: With dead ends: 1027 [2018-10-24 13:17:20,362 INFO L226 Difference]: Without dead ends: 717 [2018-10-24 13:17:20,369 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 [2018-10-24 13:17:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2018-10-24 13:17:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2018-10-24 13:17:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2018-10-24 13:17:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1145 transitions. [2018-10-24 13:17:20,456 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1145 transitions. Word has length 156 [2018-10-24 13:17:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:20,457 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 1145 transitions. [2018-10-24 13:17:20,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:17:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1145 transitions. [2018-10-24 13:17:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 13:17:20,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:20,468 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:20,468 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:20,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:20,468 INFO L82 PathProgramCache]: Analyzing trace with hash -475146013, now seen corresponding path program 1 times [2018-10-24 13:17:20,469 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:20,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:20,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:20,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:20,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:20,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:20,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:17:20,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:20,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:20,620 INFO L87 Difference]: Start difference. First operand 715 states and 1145 transitions. Second operand 3 states. [2018-10-24 13:17:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:22,694 INFO L93 Difference]: Finished difference Result 2058 states and 3347 transitions. [2018-10-24 13:17:22,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:22,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2018-10-24 13:17:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:22,704 INFO L225 Difference]: With dead ends: 2058 [2018-10-24 13:17:22,704 INFO L226 Difference]: Without dead ends: 1345 [2018-10-24 13:17:22,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2018-10-24 13:17:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1331. [2018-10-24 13:17:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-10-24 13:17:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2076 transitions. [2018-10-24 13:17:22,764 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2076 transitions. Word has length 165 [2018-10-24 13:17:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:22,764 INFO L481 AbstractCegarLoop]: Abstraction has 1331 states and 2076 transitions. [2018-10-24 13:17:22,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2076 transitions. [2018-10-24 13:17:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-24 13:17:22,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:22,769 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:22,769 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:22,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:22,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2016048360, now seen corresponding path program 1 times [2018-10-24 13:17:22,770 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:22,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:22,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:22,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:22,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-24 13:17:22,874 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:22,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:17:22,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:22,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:22,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:22,875 INFO L87 Difference]: Start difference. First operand 1331 states and 2076 transitions. Second operand 3 states. [2018-10-24 13:17:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:25,556 INFO L93 Difference]: Finished difference Result 3977 states and 6209 transitions. [2018-10-24 13:17:25,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:25,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2018-10-24 13:17:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:25,571 INFO L225 Difference]: With dead ends: 3977 [2018-10-24 13:17:25,572 INFO L226 Difference]: Without dead ends: 2648 [2018-10-24 13:17:25,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2018-10-24 13:17:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2645. [2018-10-24 13:17:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2645 states. [2018-10-24 13:17:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4120 transitions. [2018-10-24 13:17:25,644 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4120 transitions. Word has length 179 [2018-10-24 13:17:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:25,645 INFO L481 AbstractCegarLoop]: Abstraction has 2645 states and 4120 transitions. [2018-10-24 13:17:25,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4120 transitions. [2018-10-24 13:17:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-24 13:17:25,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:25,652 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:25,652 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:25,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:25,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1738970836, now seen corresponding path program 1 times [2018-10-24 13:17:25,653 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:25,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:25,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:25,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:25,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 13:17:25,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:25,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:17:25,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:25,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:25,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:25,824 INFO L87 Difference]: Start difference. First operand 2645 states and 4120 transitions. Second operand 3 states. [2018-10-24 13:17:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:26,560 INFO L93 Difference]: Finished difference Result 5250 states and 8186 transitions. [2018-10-24 13:17:26,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:26,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2018-10-24 13:17:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:26,573 INFO L225 Difference]: With dead ends: 5250 [2018-10-24 13:17:26,574 INFO L226 Difference]: Without dead ends: 2607 [2018-10-24 13:17:26,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2018-10-24 13:17:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2607. [2018-10-24 13:17:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2607 states. [2018-10-24 13:17:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3992 transitions. [2018-10-24 13:17:26,632 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3992 transitions. Word has length 187 [2018-10-24 13:17:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:26,633 INFO L481 AbstractCegarLoop]: Abstraction has 2607 states and 3992 transitions. [2018-10-24 13:17:26,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3992 transitions. [2018-10-24 13:17:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-24 13:17:26,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:26,638 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:26,638 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:26,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash -624682400, now seen corresponding path program 1 times [2018-10-24 13:17:26,639 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:26,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:26,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:26,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:26,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:27,174 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 13:17:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:27,221 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:27,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 13:17:27,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 13:17:27,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 13:17:27,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 13:17:27,222 INFO L87 Difference]: Start difference. First operand 2607 states and 3992 transitions. Second operand 5 states. [2018-10-24 13:17:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:31,339 INFO L93 Difference]: Finished difference Result 6279 states and 9778 transitions. [2018-10-24 13:17:31,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 13:17:31,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2018-10-24 13:17:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:31,358 INFO L225 Difference]: With dead ends: 6279 [2018-10-24 13:17:31,358 INFO L226 Difference]: Without dead ends: 3674 [2018-10-24 13:17:31,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 13:17:31,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2018-10-24 13:17:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3015. [2018-10-24 13:17:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2018-10-24 13:17:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4612 transitions. [2018-10-24 13:17:31,424 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4612 transitions. Word has length 196 [2018-10-24 13:17:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:31,425 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4612 transitions. [2018-10-24 13:17:31,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 13:17:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4612 transitions. [2018-10-24 13:17:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-24 13:17:31,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:31,431 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:31,431 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:31,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:31,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2080281876, now seen corresponding path program 1 times [2018-10-24 13:17:31,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:31,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:31,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:31,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:31,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 13:17:31,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:17:31,758 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 13:17:31,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:31,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:17:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-24 13:17:32,036 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 13:17:32,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2018-10-24 13:17:32,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:17:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:17:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:32,038 INFO L87 Difference]: Start difference. First operand 3015 states and 4612 transitions. Second operand 4 states. [2018-10-24 13:17:35,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:35,786 INFO L93 Difference]: Finished difference Result 12048 states and 18435 transitions. [2018-10-24 13:17:35,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:17:35,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 232 [2018-10-24 13:17:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:35,831 INFO L225 Difference]: With dead ends: 12048 [2018-10-24 13:17:35,831 INFO L226 Difference]: Without dead ends: 9035 [2018-10-24 13:17:35,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2018-10-24 13:17:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 6022. [2018-10-24 13:17:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6022 states. [2018-10-24 13:17:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 9192 transitions. [2018-10-24 13:17:35,988 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 9192 transitions. Word has length 232 [2018-10-24 13:17:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:35,989 INFO L481 AbstractCegarLoop]: Abstraction has 6022 states and 9192 transitions. [2018-10-24 13:17:35,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:17:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 9192 transitions. [2018-10-24 13:17:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-24 13:17:35,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:35,998 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:35,999 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:35,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1949453061, now seen corresponding path program 1 times [2018-10-24 13:17:35,999 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:35,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:36,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:36,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:36,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 13:17:36,225 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:36,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:36,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:36,230 INFO L87 Difference]: Start difference. First operand 6022 states and 9192 transitions. Second operand 3 states. [2018-10-24 13:17:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:40,542 INFO L93 Difference]: Finished difference Result 17361 states and 26560 transitions. [2018-10-24 13:17:40,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:40,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2018-10-24 13:17:40,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:40,590 INFO L225 Difference]: With dead ends: 17361 [2018-10-24 13:17:40,590 INFO L226 Difference]: Without dead ends: 11341 [2018-10-24 13:17:40,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2018-10-24 13:17:40,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 11337. [2018-10-24 13:17:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11337 states. [2018-10-24 13:17:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11337 states to 11337 states and 15999 transitions. [2018-10-24 13:17:40,823 INFO L78 Accepts]: Start accepts. Automaton has 11337 states and 15999 transitions. Word has length 232 [2018-10-24 13:17:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:40,824 INFO L481 AbstractCegarLoop]: Abstraction has 11337 states and 15999 transitions. [2018-10-24 13:17:40,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 11337 states and 15999 transitions. [2018-10-24 13:17:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-24 13:17:40,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:40,838 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:40,838 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:40,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1292184038, now seen corresponding path program 1 times [2018-10-24 13:17:40,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:40,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:40,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:40,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:40,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:41,298 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:41,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:41,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:17:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:17:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:41,299 INFO L87 Difference]: Start difference. First operand 11337 states and 15999 transitions. Second operand 4 states. [2018-10-24 13:17:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:44,638 INFO L93 Difference]: Finished difference Result 41584 states and 58255 transitions. [2018-10-24 13:17:44,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:17:44,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2018-10-24 13:17:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:44,701 INFO L225 Difference]: With dead ends: 41584 [2018-10-24 13:17:44,701 INFO L226 Difference]: Without dead ends: 30249 [2018-10-24 13:17:44,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30249 states. [2018-10-24 13:17:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30249 to 21129. [2018-10-24 13:17:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21129 states. [2018-10-24 13:17:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21129 states to 21129 states and 28285 transitions. [2018-10-24 13:17:45,089 INFO L78 Accepts]: Start accepts. Automaton has 21129 states and 28285 transitions. Word has length 235 [2018-10-24 13:17:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:45,090 INFO L481 AbstractCegarLoop]: Abstraction has 21129 states and 28285 transitions. [2018-10-24 13:17:45,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:17:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 21129 states and 28285 transitions. [2018-10-24 13:17:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-24 13:17:45,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:45,111 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:45,111 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:45,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1803481727, now seen corresponding path program 1 times [2018-10-24 13:17:45,112 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:45,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:45,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:45,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:45,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-24 13:17:45,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:45,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:45,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:45,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:45,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:45,257 INFO L87 Difference]: Start difference. First operand 21129 states and 28285 transitions. Second operand 3 states. [2018-10-24 13:17:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:46,820 INFO L93 Difference]: Finished difference Result 42264 states and 56582 transitions. [2018-10-24 13:17:46,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:46,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2018-10-24 13:17:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:46,859 INFO L225 Difference]: With dead ends: 42264 [2018-10-24 13:17:46,859 INFO L226 Difference]: Without dead ends: 21137 [2018-10-24 13:17:46,883 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 [2018-10-24 13:17:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2018-10-24 13:17:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 21129. [2018-10-24 13:17:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21129 states. [2018-10-24 13:17:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21129 states to 21129 states and 25984 transitions. [2018-10-24 13:17:47,161 INFO L78 Accepts]: Start accepts. Automaton has 21129 states and 25984 transitions. Word has length 239 [2018-10-24 13:17:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:47,161 INFO L481 AbstractCegarLoop]: Abstraction has 21129 states and 25984 transitions. [2018-10-24 13:17:47,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 21129 states and 25984 transitions. [2018-10-24 13:17:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-24 13:17:47,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:47,349 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:47,349 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:47,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:47,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1908645910, now seen corresponding path program 1 times [2018-10-24 13:17:47,350 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:47,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:47,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:47,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:47,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 13:17:47,622 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:47,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:47,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:17:47,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:17:47,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:47,624 INFO L87 Difference]: Start difference. First operand 21129 states and 25984 transitions. Second operand 4 states. [2018-10-24 13:17:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:49,074 INFO L93 Difference]: Finished difference Result 41848 states and 51444 transitions. [2018-10-24 13:17:49,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:17:49,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2018-10-24 13:17:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:49,098 INFO L225 Difference]: With dead ends: 41848 [2018-10-24 13:17:49,098 INFO L226 Difference]: Without dead ends: 20721 [2018-10-24 13:17:49,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20721 states. [2018-10-24 13:17:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20721 to 20721. [2018-10-24 13:17:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20721 states. [2018-10-24 13:17:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20721 states to 20721 states and 24096 transitions. [2018-10-24 13:17:49,384 INFO L78 Accepts]: Start accepts. Automaton has 20721 states and 24096 transitions. Word has length 247 [2018-10-24 13:17:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:49,384 INFO L481 AbstractCegarLoop]: Abstraction has 20721 states and 24096 transitions. [2018-10-24 13:17:49,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:17:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 20721 states and 24096 transitions. [2018-10-24 13:17:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-24 13:17:49,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:49,403 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:49,403 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:49,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:49,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1252697395, now seen corresponding path program 1 times [2018-10-24 13:17:49,404 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:49,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:49,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:49,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:49,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 108 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:49,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:17:49,822 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 13:17:49,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:49,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:17:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 13:17:50,044 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 13:17:50,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 13:17:50,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 13:17:50,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 13:17:50,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 13:17:50,045 INFO L87 Difference]: Start difference. First operand 20721 states and 24096 transitions. Second operand 8 states. [2018-10-24 13:17:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:58,200 INFO L93 Difference]: Finished difference Result 115966 states and 132889 transitions. [2018-10-24 13:17:58,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 13:17:58,201 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 252 [2018-10-24 13:17:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:58,337 INFO L225 Difference]: With dead ends: 115966 [2018-10-24 13:17:58,338 INFO L226 Difference]: Without dead ends: 95247 [2018-10-24 13:17:58,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-10-24 13:17:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95247 states. [2018-10-24 13:17:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95247 to 57171. [2018-10-24 13:17:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57171 states. [2018-10-24 13:17:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57171 states to 57171 states and 64038 transitions. [2018-10-24 13:17:59,924 INFO L78 Accepts]: Start accepts. Automaton has 57171 states and 64038 transitions. Word has length 252 [2018-10-24 13:17:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:59,924 INFO L481 AbstractCegarLoop]: Abstraction has 57171 states and 64038 transitions. [2018-10-24 13:17:59,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 13:17:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 57171 states and 64038 transitions. [2018-10-24 13:17:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-24 13:17:59,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:59,958 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:59,958 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:59,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:59,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1332573799, now seen corresponding path program 1 times [2018-10-24 13:17:59,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:59,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:59,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:59,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:59,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-24 13:18:00,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:18:00,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:18:00,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:18:00,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:18:00,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:18:00,293 INFO L87 Difference]: Start difference. First operand 57171 states and 64038 transitions. Second operand 4 states. [2018-10-24 13:18:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:03,066 INFO L93 Difference]: Finished difference Result 214499 states and 240016 transitions. [2018-10-24 13:18:03,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:18:03,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2018-10-24 13:18:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:03,225 INFO L225 Difference]: With dead ends: 214499 [2018-10-24 13:18:03,225 INFO L226 Difference]: Without dead ends: 157330 [2018-10-24 13:18:03,283 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 [2018-10-24 13:18:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157330 states. [2018-10-24 13:18:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157330 to 157326. [2018-10-24 13:18:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157326 states. [2018-10-24 13:18:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157326 states to 157326 states and 175632 transitions. [2018-10-24 13:18:06,095 INFO L78 Accepts]: Start accepts. Automaton has 157326 states and 175632 transitions. Word has length 260 [2018-10-24 13:18:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:06,095 INFO L481 AbstractCegarLoop]: Abstraction has 157326 states and 175632 transitions. [2018-10-24 13:18:06,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:18:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 157326 states and 175632 transitions. [2018-10-24 13:18:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-24 13:18:06,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:06,119 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:18:06,120 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:06,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:06,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1041833096, now seen corresponding path program 1 times [2018-10-24 13:18:06,120 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:06,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:06,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:06,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:06,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-10-24 13:18:06,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:18:06,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:18:06,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:18:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:18:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:18:06,342 INFO L87 Difference]: Start difference. First operand 157326 states and 175632 transitions. Second operand 3 states. [2018-10-24 13:18:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:10,193 INFO L93 Difference]: Finished difference Result 398997 states and 445210 transitions. [2018-10-24 13:18:10,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:18:10,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 294 [2018-10-24 13:18:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:10,472 INFO L225 Difference]: With dead ends: 398997 [2018-10-24 13:18:10,472 INFO L226 Difference]: Without dead ends: 241673 [2018-10-24 13:18:10,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:18:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241673 states. [2018-10-24 13:18:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241673 to 241652. [2018-10-24 13:18:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241652 states. [2018-10-24 13:18:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241652 states to 241652 states and 269313 transitions. [2018-10-24 13:18:14,870 INFO L78 Accepts]: Start accepts. Automaton has 241652 states and 269313 transitions. Word has length 294 [2018-10-24 13:18:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:14,870 INFO L481 AbstractCegarLoop]: Abstraction has 241652 states and 269313 transitions. [2018-10-24 13:18:14,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:18:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 241652 states and 269313 transitions. [2018-10-24 13:18:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-24 13:18:14,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:14,893 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:18:14,893 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:14,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -676252364, now seen corresponding path program 1 times [2018-10-24 13:18:14,894 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:14,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:14,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:14,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:14,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:15,229 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 13:18:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 111 proven. 4 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-10-24 13:18:15,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:18:15,395 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 13:18:15,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:15,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:18:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-10-24 13:18:15,660 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 13:18:15,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-24 13:18:15,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 13:18:15,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 13:18:15,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 13:18:15,662 INFO L87 Difference]: Start difference. First operand 241652 states and 269313 transitions. Second operand 6 states. [2018-10-24 13:18:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:24,129 INFO L93 Difference]: Finished difference Result 683568 states and 763505 transitions. [2018-10-24 13:18:24,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 13:18:24,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 302 [2018-10-24 13:18:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:24,664 INFO L225 Difference]: With dead ends: 683568 [2018-10-24 13:18:24,664 INFO L226 Difference]: Without dead ends: 441918 [2018-10-24 13:18:24,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-24 13:18:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441918 states. [2018-10-24 13:18:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441918 to 440171. [2018-10-24 13:18:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440171 states. [2018-10-24 13:18:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440171 states to 440171 states and 477419 transitions. [2018-10-24 13:18:39,934 INFO L78 Accepts]: Start accepts. Automaton has 440171 states and 477419 transitions. Word has length 302 [2018-10-24 13:18:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:39,935 INFO L481 AbstractCegarLoop]: Abstraction has 440171 states and 477419 transitions. [2018-10-24 13:18:39,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 13:18:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 440171 states and 477419 transitions. [2018-10-24 13:18:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-24 13:18:39,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:39,957 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:18:39,957 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:39,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:39,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1377458434, now seen corresponding path program 1 times [2018-10-24 13:18:39,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:39,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:39,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:39,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:39,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-24 13:18:40,259 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:18:40,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 13:18:40,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 13:18:40,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 13:18:40,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 13:18:40,260 INFO L87 Difference]: Start difference. First operand 440171 states and 477419 transitions. Second operand 5 states. [2018-10-24 13:18:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:48,348 INFO L93 Difference]: Finished difference Result 1166185 states and 1259615 transitions. [2018-10-24 13:18:48,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 13:18:48,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2018-10-24 13:18:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:49,424 INFO L225 Difference]: With dead ends: 1166185 [2018-10-24 13:18:49,424 INFO L226 Difference]: Without dead ends: 726016 [2018-10-24 13:18:49,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 13:18:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726016 states. [2018-10-24 13:19:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726016 to 675185. [2018-10-24 13:19:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675185 states. [2018-10-24 13:19:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675185 states to 675185 states and 728370 transitions. [2018-10-24 13:19:01,700 INFO L78 Accepts]: Start accepts. Automaton has 675185 states and 728370 transitions. Word has length 302 [2018-10-24 13:19:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:19:01,700 INFO L481 AbstractCegarLoop]: Abstraction has 675185 states and 728370 transitions. [2018-10-24 13:19:01,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 13:19:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 675185 states and 728370 transitions. [2018-10-24 13:19:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-24 13:19:01,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:19:01,725 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:19:01,725 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:19:01,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:19:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash 817887903, now seen corresponding path program 1 times [2018-10-24 13:19:01,726 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:19:01,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:19:01,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:19:01,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:19:01,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:19:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:19:02,026 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 13:19:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-24 13:19:02,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:19:02,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:19:02,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:19:02,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:19:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:19:02,113 INFO L87 Difference]: Start difference. First operand 675185 states and 728370 transitions. Second operand 4 states. [2018-10-24 13:19:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:19:19,185 INFO L93 Difference]: Finished difference Result 1919610 states and 2063817 transitions. [2018-10-24 13:19:19,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:19:19,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2018-10-24 13:19:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:19:20,889 INFO L225 Difference]: With dead ends: 1919610 [2018-10-24 13:19:20,890 INFO L226 Difference]: Without dead ends: 1244427 [2018-10-24 13:19:21,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:19:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244427 states. [2018-10-24 13:19:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244427 to 1062592. [2018-10-24 13:19:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062592 states. [2018-10-24 13:19:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062592 states to 1062592 states and 1136101 transitions. [2018-10-24 13:19:56,002 INFO L78 Accepts]: Start accepts. Automaton has 1062592 states and 1136101 transitions. Word has length 313 [2018-10-24 13:19:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:19:56,002 INFO L481 AbstractCegarLoop]: Abstraction has 1062592 states and 1136101 transitions. [2018-10-24 13:19:56,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:19:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1062592 states and 1136101 transitions. [2018-10-24 13:19:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-24 13:19:56,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:19:56,025 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:19:56,025 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:19:56,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:19:56,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1817223472, now seen corresponding path program 1 times [2018-10-24 13:19:56,025 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:19:56,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:19:56,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:19:56,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:19:56,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:19:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:19:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 13:19:56,269 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:19:56,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:19:56,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:19:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:19:56,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:19:56,271 INFO L87 Difference]: Start difference. First operand 1062592 states and 1136101 transitions. Second operand 3 states. [2018-10-24 13:20:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:20:10,983 INFO L93 Difference]: Finished difference Result 2124939 states and 2271910 transitions. [2018-10-24 13:20:10,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:20:10,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2018-10-24 13:20:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:20:12,326 INFO L225 Difference]: With dead ends: 2124939 [2018-10-24 13:20:12,326 INFO L226 Difference]: Without dead ends: 1062349 [2018-10-24 13:20:12,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:20:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062349 states. Received shutdown request... [2018-10-24 13:20:28,723 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 13:20:28,727 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 13:20:28,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 01:20:28 BoogieIcfgContainer [2018-10-24 13:20:28,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 13:20:28,729 INFO L168 Benchmark]: Toolchain (without parser) took 201874.98 ms. Allocated memory was 1.5 GB in the beginning and 6.7 GB in the end (delta: 5.2 GB). Free memory was 1.4 GB in the beginning and 3.9 GB in the end (delta: -2.4 GB). Peak memory consumption was 6.3 GB. Max. memory is 7.1 GB. [2018-10-24 13:20:28,730 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 13:20:28,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1313.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-24 13:20:28,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 332.01 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -862.9 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-24 13:20:28,733 INFO L168 Benchmark]: Boogie Preprocessor took 141.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-10-24 13:20:28,734 INFO L168 Benchmark]: RCFGBuilder took 6093.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 270.6 MB). Peak memory consumption was 270.6 MB. Max. memory is 7.1 GB. [2018-10-24 13:20:28,735 INFO L168 Benchmark]: TraceAbstraction took 193988.74 ms. Allocated memory was 2.3 GB in the beginning and 6.7 GB in the end (delta: 4.4 GB). Free memory was 1.9 GB in the beginning and 3.9 GB in the end (delta: -1.9 GB). Peak memory consumption was 6.1 GB. Max. memory is 7.1 GB. [2018-10-24 13:20:28,740 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1313.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 332.01 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -862.9 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6093.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 270.6 MB). Peak memory consumption was 270.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 193988.74 ms. Allocated memory was 2.3 GB in the beginning and 6.7 GB in the end (delta: 4.4 GB). Free memory was 1.9 GB in the beginning and 3.9 GB in the end (delta: -1.9 GB). Peak memory consumption was 6.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1500]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1500). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 303 locations, 1 error locations. TIMEOUT Result, 193.9s OverallTime, 17 OverallIterations, 5 TraceHistogramMax, 98.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3938 SDtfs, 15364 SDslu, 4680 SDs, 0 SdLazy, 19356 SolverSat, 4056 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 868 GetRequests, 811 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1062592occurred in iteration=16, 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: 88.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 285337 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 4911 NumberOfCodeBlocks, 4911 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 4891 ConstructedInterpolants, 0 QuantifiedInterpolants, 2452438 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1559 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 2636/2660 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown