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/Problem18_label04_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:53:50,067 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:53:50,069 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:53:50,085 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:53:50,085 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:53:50,086 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:53:50,088 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:53:50,090 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:53:50,093 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:53:50,099 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:53:50,100 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:53:50,101 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:53:50,101 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:53:50,106 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:53:50,107 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:53:50,107 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:53:50,112 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:53:50,115 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:53:50,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:53:50,120 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:53:50,123 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:53:50,125 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:53:50,128 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:53:50,141 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:53:50,141 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:53:50,143 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:53:50,143 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:53:50,143 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 16:53:50,170 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:53:50,170 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:53:50,171 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:53:50,171 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:53:50,175 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:53:50,175 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:53:50,176 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:53:50,176 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:53:50,176 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:53:50,176 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:53:50,176 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:53:50,177 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:53:50,178 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:53:50,178 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:53:50,178 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:53:50,178 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:53:50,179 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:53:50,179 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:53:50,179 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:53:50,179 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:53:50,179 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:53:50,180 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:53:50,181 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:53:50,181 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:53:50,181 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:53:50,181 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:53:50,182 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:53:50,182 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:53:50,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:53:50,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:53:50,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:53:50,275 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:53:50,275 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:53:50,276 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label04_true-unreach-call.c [2018-10-24 16:53:50,341 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a68636c48/f8967d27e983468ab41929eb89f05111/FLAG355aec061 [2018-10-24 16:53:51,091 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:53:51,092 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label04_true-unreach-call.c [2018-10-24 16:53:51,119 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a68636c48/f8967d27e983468ab41929eb89f05111/FLAG355aec061 [2018-10-24 16:53:51,141 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a68636c48/f8967d27e983468ab41929eb89f05111 [2018-10-24 16:53:51,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:53:51,157 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:53:51,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:53:51,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:53:51,163 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:53:51,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:53:51" (1/1) ... [2018-10-24 16:53:51,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af83bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:51, skipping insertion in model container [2018-10-24 16:53:51,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:53:51" (1/1) ... [2018-10-24 16:53:51,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:53:51,324 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:53:52,316 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:53:52,321 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:53:52,817 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:53:52,846 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:53:52,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52 WrapperNode [2018-10-24 16:53:52,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:53:52,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:53:52,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:53:52,848 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:53:52,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:52,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:53,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:53:53,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:53:53,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:53:53,383 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:53:53,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:53,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:53,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:53,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:53,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:53,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:53,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (1/1) ... [2018-10-24 16:53:53,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:53:53,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:53:53,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:53:53,647 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:53:53,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (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 16:53:53,716 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:53:53,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:53:53,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:54:02,378 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:54:02,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:54:02 BoogieIcfgContainer [2018-10-24 16:54:02,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:54:02,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:54:02,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:54:02,385 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:54:02,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:53:51" (1/3) ... [2018-10-24 16:54:02,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c49c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:54:02, skipping insertion in model container [2018-10-24 16:54:02,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:53:52" (2/3) ... [2018-10-24 16:54:02,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c49c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:54:02, skipping insertion in model container [2018-10-24 16:54:02,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:54:02" (3/3) ... [2018-10-24 16:54:02,389 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label04_true-unreach-call.c [2018-10-24 16:54:02,400 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:54:02,410 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:54:02,428 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:54:02,473 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:54:02,474 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:54:02,474 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:54:02,474 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:54:02,474 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:54:02,475 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:54:02,475 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:54:02,475 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:54:02,475 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:54:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-24 16:54:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-24 16:54:02,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:02,521 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] [2018-10-24 16:54:02,523 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:02,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:02,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1884671582, now seen corresponding path program 1 times [2018-10-24 16:54:02,533 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:02,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:02,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:02,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:02,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:02,963 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 16:54:03,220 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-10-24 16:54:03,383 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 16:54:03,386 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:54:03,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:54:03,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:54:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:54:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:54:03,413 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 6 states. [2018-10-24 16:54:03,602 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-24 16:54:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:20,836 INFO L93 Difference]: Finished difference Result 4292 states and 8414 transitions. [2018-10-24 16:54:20,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:54:20,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2018-10-24 16:54:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:20,891 INFO L225 Difference]: With dead ends: 4292 [2018-10-24 16:54:20,892 INFO L226 Difference]: Without dead ends: 3521 [2018-10-24 16:54:20,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:54:20,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2018-10-24 16:54:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2828. [2018-10-24 16:54:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2828 states. [2018-10-24 16:54:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 4092 transitions. [2018-10-24 16:54:21,113 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 4092 transitions. Word has length 53 [2018-10-24 16:54:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:21,114 INFO L481 AbstractCegarLoop]: Abstraction has 2828 states and 4092 transitions. [2018-10-24 16:54:21,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:54:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 4092 transitions. [2018-10-24 16:54:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-24 16:54:21,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:21,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:54:21,122 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:21,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash -159985225, now seen corresponding path program 1 times [2018-10-24 16:54:21,123 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:21,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:21,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:21,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:21,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:21,899 WARN L179 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-10-24 16:54:22,067 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2018-10-24 16:54:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:54:22,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:54:22,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:54:22,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:54:22,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:54:22,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:54:22,163 INFO L87 Difference]: Start difference. First operand 2828 states and 4092 transitions. Second operand 5 states. [2018-10-24 16:54:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:33,911 INFO L93 Difference]: Finished difference Result 8418 states and 12613 transitions. [2018-10-24 16:54:33,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:54:33,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2018-10-24 16:54:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:33,938 INFO L225 Difference]: With dead ends: 8418 [2018-10-24 16:54:33,939 INFO L226 Difference]: Without dead ends: 5592 [2018-10-24 16:54:33,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:54:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2018-10-24 16:54:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 5592. [2018-10-24 16:54:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5592 states. [2018-10-24 16:54:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 7127 transitions. [2018-10-24 16:54:34,049 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 7127 transitions. Word has length 147 [2018-10-24 16:54:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:34,050 INFO L481 AbstractCegarLoop]: Abstraction has 5592 states and 7127 transitions. [2018-10-24 16:54:34,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:54:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 7127 transitions. [2018-10-24 16:54:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-24 16:54:34,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:34,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:54:34,055 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:34,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1116212699, now seen corresponding path program 1 times [2018-10-24 16:54:34,056 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:34,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:34,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:34,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:34,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-10-24 16:54:34,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:54:34,316 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 16:54:34,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:34,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:54:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:54:34,510 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:54:34,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:54:34,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:54:34,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:54:34,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:54:34,512 INFO L87 Difference]: Start difference. First operand 5592 states and 7127 transitions. Second operand 4 states. [2018-10-24 16:54:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:42,509 INFO L93 Difference]: Finished difference Result 17417 states and 23373 transitions. [2018-10-24 16:54:42,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:54:42,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2018-10-24 16:54:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:42,562 INFO L225 Difference]: With dead ends: 17417 [2018-10-24 16:54:42,562 INFO L226 Difference]: Without dead ends: 12518 [2018-10-24 16:54:42,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 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 16:54:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12518 states. [2018-10-24 16:54:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12518 to 7665. [2018-10-24 16:54:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7665 states. [2018-10-24 16:54:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7665 states to 7665 states and 9557 transitions. [2018-10-24 16:54:42,723 INFO L78 Accepts]: Start accepts. Automaton has 7665 states and 9557 transitions. Word has length 236 [2018-10-24 16:54:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:42,724 INFO L481 AbstractCegarLoop]: Abstraction has 7665 states and 9557 transitions. [2018-10-24 16:54:42,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:54:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7665 states and 9557 transitions. [2018-10-24 16:54:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-24 16:54:42,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:42,729 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:54:42,729 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:42,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:42,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1085335796, now seen corresponding path program 1 times [2018-10-24 16:54:42,730 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:42,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:42,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:42,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:42,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:54:43,131 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:54:43,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:54:43,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:54:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:54:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:54:43,132 INFO L87 Difference]: Start difference. First operand 7665 states and 9557 transitions. Second operand 4 states. [2018-10-24 16:54:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:54:49,572 INFO L93 Difference]: Finished difference Result 17401 states and 21937 transitions. [2018-10-24 16:54:49,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:54:49,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2018-10-24 16:54:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:54:49,605 INFO L225 Difference]: With dead ends: 17401 [2018-10-24 16:54:49,605 INFO L226 Difference]: Without dead ends: 9046 [2018-10-24 16:54:49,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:54:49,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9046 states. [2018-10-24 16:54:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9046 to 9046. [2018-10-24 16:54:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9046 states. [2018-10-24 16:54:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9046 states to 9046 states and 10795 transitions. [2018-10-24 16:54:49,739 INFO L78 Accepts]: Start accepts. Automaton has 9046 states and 10795 transitions. Word has length 306 [2018-10-24 16:54:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:54:49,739 INFO L481 AbstractCegarLoop]: Abstraction has 9046 states and 10795 transitions. [2018-10-24 16:54:49,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:54:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 9046 states and 10795 transitions. [2018-10-24 16:54:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-24 16:54:49,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:54:49,745 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:54:49,745 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:54:49,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:54:49,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1773253513, now seen corresponding path program 1 times [2018-10-24 16:54:49,746 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:54:49,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:54:49,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:49,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:49,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:54:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 200 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:54:50,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:54:50,133 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 16:54:50,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:54:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:54:50,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:54:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-24 16:54:50,404 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:54:50,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-24 16:54:50,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:54:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:54:50,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:54:50,407 INFO L87 Difference]: Start difference. First operand 9046 states and 10795 transitions. Second operand 6 states. [2018-10-24 16:54:51,115 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-10-24 16:55:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:00,909 INFO L93 Difference]: Finished difference Result 29848 states and 35478 transitions. [2018-10-24 16:55:00,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:55:00,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 340 [2018-10-24 16:55:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:00,949 INFO L225 Difference]: With dead ends: 29848 [2018-10-24 16:55:00,949 INFO L226 Difference]: Without dead ends: 18032 [2018-10-24 16:55:00,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:55:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18032 states. [2018-10-24 16:55:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18032 to 13188. [2018-10-24 16:55:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13188 states. [2018-10-24 16:55:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13188 states to 13188 states and 14343 transitions. [2018-10-24 16:55:01,172 INFO L78 Accepts]: Start accepts. Automaton has 13188 states and 14343 transitions. Word has length 340 [2018-10-24 16:55:01,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:01,173 INFO L481 AbstractCegarLoop]: Abstraction has 13188 states and 14343 transitions. [2018-10-24 16:55:01,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:55:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 13188 states and 14343 transitions. [2018-10-24 16:55:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2018-10-24 16:55:01,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:01,219 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:01,219 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:01,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:01,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1023982483, now seen corresponding path program 1 times [2018-10-24 16:55:01,220 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:01,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:01,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:01,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:01,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:02,146 WARN L179 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:55:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 558 proven. 0 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2018-10-24 16:55:02,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:55:02,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:55:02,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:55:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:55:02,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:55:02,790 INFO L87 Difference]: Start difference. First operand 13188 states and 14343 transitions. Second operand 4 states. [2018-10-24 16:55:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:10,551 INFO L93 Difference]: Finished difference Result 45031 states and 49532 transitions. [2018-10-24 16:55:10,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:55:10,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1036 [2018-10-24 16:55:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:10,605 INFO L225 Difference]: With dead ends: 45031 [2018-10-24 16:55:10,606 INFO L226 Difference]: Without dead ends: 31842 [2018-10-24 16:55:10,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:55:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31842 states. [2018-10-24 16:55:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31842 to 30460. [2018-10-24 16:55:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30460 states. [2018-10-24 16:55:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30460 states to 30460 states and 32826 transitions. [2018-10-24 16:55:11,285 INFO L78 Accepts]: Start accepts. Automaton has 30460 states and 32826 transitions. Word has length 1036 [2018-10-24 16:55:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:11,286 INFO L481 AbstractCegarLoop]: Abstraction has 30460 states and 32826 transitions. [2018-10-24 16:55:11,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:55:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 30460 states and 32826 transitions. [2018-10-24 16:55:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1051 [2018-10-24 16:55:11,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:11,338 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:11,338 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:11,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:11,339 INFO L82 PathProgramCache]: Analyzing trace with hash -919672874, now seen corresponding path program 1 times [2018-10-24 16:55:11,339 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:11,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:11,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:11,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:11,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 477 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-24 16:55:12,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:55:12,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:55:12,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:55:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:55:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:55:12,707 INFO L87 Difference]: Start difference. First operand 30460 states and 32826 transitions. Second operand 3 states. [2018-10-24 16:55:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:15,951 INFO L93 Difference]: Finished difference Result 62300 states and 67186 transitions. [2018-10-24 16:55:15,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:55:15,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1050 [2018-10-24 16:55:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:15,992 INFO L225 Difference]: With dead ends: 62300 [2018-10-24 16:55:15,992 INFO L226 Difference]: Without dead ends: 32533 [2018-10-24 16:55:16,019 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 16:55:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32533 states. [2018-10-24 16:55:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32533 to 32533. [2018-10-24 16:55:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32533 states. [2018-10-24 16:55:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32533 states to 32533 states and 34929 transitions. [2018-10-24 16:55:16,371 INFO L78 Accepts]: Start accepts. Automaton has 32533 states and 34929 transitions. Word has length 1050 [2018-10-24 16:55:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:16,373 INFO L481 AbstractCegarLoop]: Abstraction has 32533 states and 34929 transitions. [2018-10-24 16:55:16,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:55:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 32533 states and 34929 transitions. [2018-10-24 16:55:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2018-10-24 16:55:16,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:16,392 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:16,392 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:16,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 801899915, now seen corresponding path program 1 times [2018-10-24 16:55:16,393 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:16,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:16,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:16,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:16,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:17,278 WARN L179 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-24 16:55:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 649 proven. 0 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-10-24 16:55:18,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:55:18,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:55:18,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:55:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:55:18,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:55:18,031 INFO L87 Difference]: Start difference. First operand 32533 states and 34929 transitions. Second operand 4 states. [2018-10-24 16:55:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:22,910 INFO L93 Difference]: Finished difference Result 69901 states and 75440 transitions. [2018-10-24 16:55:22,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:55:22,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1078 [2018-10-24 16:55:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:22,943 INFO L225 Difference]: With dead ends: 69901 [2018-10-24 16:55:22,943 INFO L226 Difference]: Without dead ends: 37367 [2018-10-24 16:55:22,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:55:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37367 states. [2018-10-24 16:55:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37367 to 37367. [2018-10-24 16:55:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37367 states. [2018-10-24 16:55:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37367 states to 37367 states and 40066 transitions. [2018-10-24 16:55:23,377 INFO L78 Accepts]: Start accepts. Automaton has 37367 states and 40066 transitions. Word has length 1078 [2018-10-24 16:55:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:23,379 INFO L481 AbstractCegarLoop]: Abstraction has 37367 states and 40066 transitions. [2018-10-24 16:55:23,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:55:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 37367 states and 40066 transitions. [2018-10-24 16:55:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2018-10-24 16:55:23,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:23,397 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:23,398 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:23,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:23,398 INFO L82 PathProgramCache]: Analyzing trace with hash 949946755, now seen corresponding path program 1 times [2018-10-24 16:55:23,399 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:23,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:23,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:23,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:23,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 471 proven. 752 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-10-24 16:55:27,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:55:27,111 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 16:55:27,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:27,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:55:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 616 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2018-10-24 16:55:28,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:55:28,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-24 16:55:28,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 16:55:28,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 16:55:28,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:55:28,015 INFO L87 Difference]: Start difference. First operand 37367 states and 40066 transitions. Second operand 12 states. [2018-10-24 16:55:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:47,365 INFO L93 Difference]: Finished difference Result 109053 states and 118617 transitions. [2018-10-24 16:55:47,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 16:55:47,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1128 [2018-10-24 16:55:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:47,468 INFO L225 Difference]: With dead ends: 109053 [2018-10-24 16:55:47,469 INFO L226 Difference]: Without dead ends: 72379 [2018-10-24 16:55:47,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1171 GetRequests, 1141 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=629, Unknown=0, NotChecked=0, Total=870 [2018-10-24 16:55:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72379 states. [2018-10-24 16:55:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72379 to 50496. [2018-10-24 16:55:48,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50496 states. [2018-10-24 16:55:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50496 states to 50496 states and 54053 transitions. [2018-10-24 16:55:48,532 INFO L78 Accepts]: Start accepts. Automaton has 50496 states and 54053 transitions. Word has length 1128 [2018-10-24 16:55:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:48,535 INFO L481 AbstractCegarLoop]: Abstraction has 50496 states and 54053 transitions. [2018-10-24 16:55:48,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 16:55:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 50496 states and 54053 transitions. [2018-10-24 16:55:48,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2018-10-24 16:55:48,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:48,551 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:55:48,551 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:48,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:48,552 INFO L82 PathProgramCache]: Analyzing trace with hash -463347198, now seen corresponding path program 1 times [2018-10-24 16:55:48,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:48,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:48,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:48,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:48,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2018-10-24 16:55:49,931 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:55:49,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:55:49,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:55:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:55:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:55:49,933 INFO L87 Difference]: Start difference. First operand 50496 states and 54053 transitions. Second operand 4 states. [2018-10-24 16:55:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:55:55,832 INFO L93 Difference]: Finished difference Result 107209 states and 115301 transitions. [2018-10-24 16:55:55,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:55:55,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1128 [2018-10-24 16:55:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:55:55,896 INFO L225 Difference]: With dead ends: 107209 [2018-10-24 16:55:55,896 INFO L226 Difference]: Without dead ends: 51858 [2018-10-24 16:55:55,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:55:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51858 states. [2018-10-24 16:55:56,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51858 to 51167. [2018-10-24 16:55:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51167 states. [2018-10-24 16:55:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51167 states to 51167 states and 53884 transitions. [2018-10-24 16:55:56,345 INFO L78 Accepts]: Start accepts. Automaton has 51167 states and 53884 transitions. Word has length 1128 [2018-10-24 16:55:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:55:56,346 INFO L481 AbstractCegarLoop]: Abstraction has 51167 states and 53884 transitions. [2018-10-24 16:55:56,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:55:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 51167 states and 53884 transitions. [2018-10-24 16:55:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2018-10-24 16:55:56,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:55:56,365 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:55:56,365 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:55:56,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:55:56,366 INFO L82 PathProgramCache]: Analyzing trace with hash -57160703, now seen corresponding path program 1 times [2018-10-24 16:55:56,366 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:55:56,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:55:56,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:56,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:55:56,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:55:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:55:57,080 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 16:55:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 665 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-24 16:55:58,084 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:55:58,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:55:58,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:55:58,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:55:58,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:55:58,085 INFO L87 Difference]: Start difference. First operand 51167 states and 53884 transitions. Second operand 4 states. [2018-10-24 16:56:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:56:03,454 INFO L93 Difference]: Finished difference Result 135509 states and 143194 transitions. [2018-10-24 16:56:03,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:56:03,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1144 [2018-10-24 16:56:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:56:03,535 INFO L225 Difference]: With dead ends: 135509 [2018-10-24 16:56:03,536 INFO L226 Difference]: Without dead ends: 85035 [2018-10-24 16:56:03,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:56:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85035 states. [2018-10-24 16:56:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85035 to 85033. [2018-10-24 16:56:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85033 states. [2018-10-24 16:56:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85033 states to 85033 states and 89073 transitions. [2018-10-24 16:56:04,227 INFO L78 Accepts]: Start accepts. Automaton has 85033 states and 89073 transitions. Word has length 1144 [2018-10-24 16:56:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:56:04,227 INFO L481 AbstractCegarLoop]: Abstraction has 85033 states and 89073 transitions. [2018-10-24 16:56:04,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:56:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 85033 states and 89073 transitions. [2018-10-24 16:56:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1182 [2018-10-24 16:56:04,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:04,247 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:56:04,248 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:04,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:04,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1206864501, now seen corresponding path program 1 times [2018-10-24 16:56:04,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:04,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:04,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:04,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:04,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:05,512 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-10-24 16:56:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 675 proven. 499 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-10-24 16:56:09,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:56:09,167 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:56:09,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:09,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:56:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2018-10-24 16:56:11,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:56:11,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 12 [2018-10-24 16:56:11,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 16:56:11,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 16:56:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-24 16:56:11,475 INFO L87 Difference]: Start difference. First operand 85033 states and 89073 transitions. Second operand 13 states. [2018-10-24 16:56:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:56:29,831 INFO L93 Difference]: Finished difference Result 188056 states and 196736 transitions. [2018-10-24 16:56:29,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 16:56:29,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1181 [2018-10-24 16:56:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:56:29,927 INFO L225 Difference]: With dead ends: 188056 [2018-10-24 16:56:29,927 INFO L226 Difference]: Without dead ends: 96101 [2018-10-24 16:56:29,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1181 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2018-10-24 16:56:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96101 states. [2018-10-24 16:56:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96101 to 91243. [2018-10-24 16:56:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91243 states. [2018-10-24 16:56:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91243 states to 91243 states and 94645 transitions. [2018-10-24 16:56:30,736 INFO L78 Accepts]: Start accepts. Automaton has 91243 states and 94645 transitions. Word has length 1181 [2018-10-24 16:56:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:56:30,737 INFO L481 AbstractCegarLoop]: Abstraction has 91243 states and 94645 transitions. [2018-10-24 16:56:30,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 16:56:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 91243 states and 94645 transitions. [2018-10-24 16:56:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1198 [2018-10-24 16:56:30,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:30,751 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:56:30,752 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:30,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1072137315, now seen corresponding path program 1 times [2018-10-24 16:56:30,753 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:30,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:30,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:30,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:30,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 838 proven. 0 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2018-10-24 16:56:32,188 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:56:32,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:56:32,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:56:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:56:32,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:56:32,190 INFO L87 Difference]: Start difference. First operand 91243 states and 94645 transitions. Second operand 4 states. [2018-10-24 16:56:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:56:37,681 INFO L93 Difference]: Finished difference Result 217041 states and 225289 transitions. [2018-10-24 16:56:37,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:56:37,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1197 [2018-10-24 16:56:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:56:37,811 INFO L225 Difference]: With dead ends: 217041 [2018-10-24 16:56:37,811 INFO L226 Difference]: Without dead ends: 122336 [2018-10-24 16:56:37,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:56:37,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122336 states. [2018-10-24 16:56:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122336 to 107128. [2018-10-24 16:56:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107128 states. [2018-10-24 16:56:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107128 states to 107128 states and 110471 transitions. [2018-10-24 16:56:39,491 INFO L78 Accepts]: Start accepts. Automaton has 107128 states and 110471 transitions. Word has length 1197 [2018-10-24 16:56:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:56:39,492 INFO L481 AbstractCegarLoop]: Abstraction has 107128 states and 110471 transitions. [2018-10-24 16:56:39,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:56:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 107128 states and 110471 transitions. [2018-10-24 16:56:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1212 [2018-10-24 16:56:39,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:39,507 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:56:39,507 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:39,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash 969939361, now seen corresponding path program 1 times [2018-10-24 16:56:39,508 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:39,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:39,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:39,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:39,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-10-24 16:56:40,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:56:40,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:56:40,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:56:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:56:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:56:40,696 INFO L87 Difference]: Start difference. First operand 107128 states and 110471 transitions. Second operand 4 states. [2018-10-24 16:56:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:56:45,637 INFO L93 Difference]: Finished difference Result 233602 states and 240931 transitions. [2018-10-24 16:56:45,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:56:45,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1211 [2018-10-24 16:56:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:56:45,769 INFO L225 Difference]: With dead ends: 233602 [2018-10-24 16:56:45,770 INFO L226 Difference]: Without dead ends: 123707 [2018-10-24 16:56:45,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:56:45,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123707 states. [2018-10-24 16:56:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123707 to 119561. [2018-10-24 16:56:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119561 states. [2018-10-24 16:56:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119561 states to 119561 states and 122869 transitions. [2018-10-24 16:56:46,879 INFO L78 Accepts]: Start accepts. Automaton has 119561 states and 122869 transitions. Word has length 1211 [2018-10-24 16:56:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:56:46,880 INFO L481 AbstractCegarLoop]: Abstraction has 119561 states and 122869 transitions. [2018-10-24 16:56:46,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:56:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 119561 states and 122869 transitions. [2018-10-24 16:56:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1248 [2018-10-24 16:56:46,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:56:46,892 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:56:46,893 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:56:46,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:56:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash -200433740, now seen corresponding path program 1 times [2018-10-24 16:56:46,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:56:46,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:56:46,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:46,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:46,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:56:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:47,595 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 16:56:47,875 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-24 16:56:48,058 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2018-10-24 16:56:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 847 proven. 1055 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2018-10-24 16:56:50,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:56:50,980 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:56:50,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:56:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:56:51,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:56:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1089 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-24 16:56:51,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:56:51,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-24 16:56:51,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 16:56:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 16:56:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:56:51,999 INFO L87 Difference]: Start difference. First operand 119561 states and 122869 transitions. Second operand 12 states. [2018-10-24 16:57:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:57:08,578 INFO L93 Difference]: Finished difference Result 276718 states and 284415 transitions. [2018-10-24 16:57:08,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 16:57:08,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1247 [2018-10-24 16:57:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:57:08,732 INFO L225 Difference]: With dead ends: 276718 [2018-10-24 16:57:08,733 INFO L226 Difference]: Without dead ends: 157850 [2018-10-24 16:57:08,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1258 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2018-10-24 16:57:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157850 states. [2018-10-24 16:57:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157850 to 114029. [2018-10-24 16:57:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114029 states. [2018-10-24 16:57:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114029 states to 114029 states and 116190 transitions. [2018-10-24 16:57:09,953 INFO L78 Accepts]: Start accepts. Automaton has 114029 states and 116190 transitions. Word has length 1247 [2018-10-24 16:57:09,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:57:09,954 INFO L481 AbstractCegarLoop]: Abstraction has 114029 states and 116190 transitions. [2018-10-24 16:57:09,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 16:57:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 114029 states and 116190 transitions. [2018-10-24 16:57:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1283 [2018-10-24 16:57:09,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:57:09,969 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:57:09,969 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:57:09,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:57:09,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1866356196, now seen corresponding path program 1 times [2018-10-24 16:57:09,970 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:57:09,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:57:09,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:09,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:09,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2018-10-24 16:57:11,718 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:57:11,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:57:11,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:57:11,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:57:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:57:11,719 INFO L87 Difference]: Start difference. First operand 114029 states and 116190 transitions. Second operand 4 states. [2018-10-24 16:57:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:57:16,513 INFO L93 Difference]: Finished difference Result 228746 states and 233184 transitions. [2018-10-24 16:57:16,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:57:16,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1282 [2018-10-24 16:57:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:57:16,619 INFO L225 Difference]: With dead ends: 228746 [2018-10-24 16:57:16,620 INFO L226 Difference]: Without dead ends: 111950 [2018-10-24 16:57:16,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:57:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111950 states. [2018-10-24 16:57:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111950 to 109186. [2018-10-24 16:57:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109186 states. [2018-10-24 16:57:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109186 states to 109186 states and 111046 transitions. [2018-10-24 16:57:18,191 INFO L78 Accepts]: Start accepts. Automaton has 109186 states and 111046 transitions. Word has length 1282 [2018-10-24 16:57:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:57:18,192 INFO L481 AbstractCegarLoop]: Abstraction has 109186 states and 111046 transitions. [2018-10-24 16:57:18,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:57:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 109186 states and 111046 transitions. [2018-10-24 16:57:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1306 [2018-10-24 16:57:18,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:57:18,208 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:57:18,208 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:57:18,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:57:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash 930754700, now seen corresponding path program 1 times [2018-10-24 16:57:18,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:57:18,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:57:18,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:18,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:18,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:57:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:18,852 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 16:57:19,233 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-10-24 16:57:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 1041 proven. 159 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-24 16:57:20,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:57:20,217 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:57:20,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:57:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:57:20,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:57:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 1041 proven. 159 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-24 16:57:24,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:57:24,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-24 16:57:24,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:57:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:57:24,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:57:24,313 INFO L87 Difference]: Start difference. First operand 109186 states and 111046 transitions. Second operand 7 states. Received shutdown request... [2018-10-24 16:57:38,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:57:38,713 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:57:38,720 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:57:38,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:57:38 BoogieIcfgContainer [2018-10-24 16:57:38,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:57:38,722 INFO L168 Benchmark]: Toolchain (without parser) took 227565.91 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-24 16:57:38,723 INFO L168 Benchmark]: CDTParser took 0.23 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 16:57:38,724 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1688.89 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:57:38,725 INFO L168 Benchmark]: Boogie Procedure Inliner took 534.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 800.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -971.6 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:57:38,726 INFO L168 Benchmark]: Boogie Preprocessor took 263.69 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: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:57:38,727 INFO L168 Benchmark]: RCFGBuilder took 8732.32 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 535.2 MB). Peak memory consumption was 535.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:57:38,727 INFO L168 Benchmark]: TraceAbstraction took 216340.23 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 1.7 GB in the beginning and 3.3 GB in the end (delta: -1.6 GB). Peak memory consumption was 763.9 MB. Max. memory is 7.1 GB. [2018-10-24 16:57:38,732 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1688.89 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 534.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 800.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -971.6 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 263.69 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: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8732.32 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 535.2 MB). Peak memory consumption was 535.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216340.23 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 1.7 GB in the beginning and 3.3 GB in the end (delta: -1.6 GB). Peak memory consumption was 763.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 165]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 165). Cancelled while BasicCegarLoop was constructing difference of abstraction (109186states) and FLOYD_HOARE automaton (currently 9 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (164102 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 216.2s OverallTime, 17 OverallIterations, 8 TraceHistogramMax, 166.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9310 SDtfs, 61935 SDslu, 2171 SDs, 0 SdLazy, 115029 SolverSat, 15610 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 129.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5615 GetRequests, 5483 SyntacticMatches, 13 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119561occurred in iteration=14, 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: 10.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 105145 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 20506 NumberOfCodeBlocks, 20506 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 20483 ConstructedInterpolants, 0 QuantifiedInterpolants, 65326768 SizeOfPredicates, 4 NumberOfNonLiveVariables, 6341 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 23 InterpolantComputations, 16 PerfectInterpolantSequences, 20989/23621 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown