java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label46_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 19:26:42,953 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 19:26:42,955 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 19:26:42,967 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 19:26:42,967 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 19:26:42,968 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 19:26:42,970 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 19:26:42,972 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 19:26:42,973 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 19:26:42,974 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 19:26:42,975 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 19:26:42,975 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 19:26:42,976 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 19:26:42,977 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 19:26:42,981 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 19:26:42,982 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 19:26:42,983 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 19:26:42,985 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 19:26:42,988 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 19:26:42,990 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 19:26:42,993 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 19:26:42,994 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 19:26:42,997 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 19:26:42,997 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 19:26:42,998 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 19:26:42,999 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 19:26:43,000 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 19:26:43,001 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 19:26:43,002 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 19:26:43,004 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 19:26:43,004 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 19:26:43,006 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 19:26:43,010 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 19:26:43,036 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 19:26:43,036 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 19:26:43,037 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 19:26:43,037 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 19:26:43,038 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 19:26:43,038 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 19:26:43,038 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 19:26:43,039 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 19:26:43,039 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 19:26:43,039 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 19:26:43,039 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 19:26:43,039 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 19:26:43,039 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 19:26:43,040 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 19:26:43,040 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 19:26:43,040 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 19:26:43,040 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 19:26:43,040 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 19:26:43,041 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 19:26:43,041 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 19:26:43,041 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 19:26:43,041 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 19:26:43,041 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 19:26:43,042 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 19:26:43,042 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 19:26:43,042 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 19:26:43,042 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 19:26:43,042 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 19:26:43,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 19:26:43,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 19:26:43,115 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 19:26:43,116 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 19:26:43,117 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 19:26:43,118 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label46_false-unreach-call.c [2018-11-06 19:26:43,184 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b178d64d2/757a5a397afb44e38223a4265dae6b1e/FLAG7280b7d4a [2018-11-06 19:26:43,853 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 19:26:43,854 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label46_false-unreach-call.c [2018-11-06 19:26:43,873 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b178d64d2/757a5a397afb44e38223a4265dae6b1e/FLAG7280b7d4a [2018-11-06 19:26:43,893 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b178d64d2/757a5a397afb44e38223a4265dae6b1e [2018-11-06 19:26:43,905 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 19:26:43,907 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 19:26:43,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 19:26:43,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 19:26:43,914 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 19:26:43,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:26:43" (1/1) ... [2018-11-06 19:26:43,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ec1c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:43, skipping insertion in model container [2018-11-06 19:26:43,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:26:43" (1/1) ... [2018-11-06 19:26:43,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 19:26:44,006 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 19:26:44,719 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 19:26:44,723 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 19:26:44,976 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 19:26:44,999 INFO L193 MainTranslator]: Completed translation [2018-11-06 19:26:45,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45 WrapperNode [2018-11-06 19:26:45,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 19:26:45,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 19:26:45,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 19:26:45,001 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 19:26:45,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 19:26:45,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 19:26:45,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 19:26:45,319 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 19:26:45,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... [2018-11-06 19:26:45,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 19:26:45,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 19:26:45,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 19:26:45,511 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 19:26:45,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 19:26:45,585 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-06 19:26:45,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 19:26:45,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 19:26:51,320 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 19:26:51,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:26:51 BoogieIcfgContainer [2018-11-06 19:26:51,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 19:26:51,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 19:26:51,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 19:26:51,326 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 19:26:51,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:26:43" (1/3) ... [2018-11-06 19:26:51,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223ba3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:26:51, skipping insertion in model container [2018-11-06 19:26:51,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:26:45" (2/3) ... [2018-11-06 19:26:51,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223ba3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:26:51, skipping insertion in model container [2018-11-06 19:26:51,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:26:51" (3/3) ... [2018-11-06 19:26:51,330 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label46_false-unreach-call.c [2018-11-06 19:26:51,342 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 19:26:51,351 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 19:26:51,370 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 19:26:51,412 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 19:26:51,412 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 19:26:51,413 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 19:26:51,413 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 19:26:51,413 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 19:26:51,413 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 19:26:51,413 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 19:26:51,414 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 19:26:51,414 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 19:26:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-11-06 19:26:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 19:26:51,456 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:26:51,457 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:26:51,459 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:26:51,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:26:51,466 INFO L82 PathProgramCache]: Analyzing trace with hash -809652462, now seen corresponding path program 1 times [2018-11-06 19:26:51,468 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:26:51,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:26:51,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:26:51,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:26:51,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:26:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:26:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:26:51,937 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:26:51,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:26:51,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:26:51,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:26:51,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:26:51,964 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 4 states. [2018-11-06 19:26:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:26:58,391 INFO L93 Difference]: Finished difference Result 1458 states and 2766 transitions. [2018-11-06 19:26:58,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:26:58,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-06 19:26:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:26:58,425 INFO L225 Difference]: With dead ends: 1458 [2018-11-06 19:26:58,425 INFO L226 Difference]: Without dead ends: 1054 [2018-11-06 19:26:58,431 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:26:58,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2018-11-06 19:26:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2018-11-06 19:26:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1054 states. [2018-11-06 19:26:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1740 transitions. [2018-11-06 19:26:58,545 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1740 transitions. Word has length 17 [2018-11-06 19:26:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:26:58,545 INFO L480 AbstractCegarLoop]: Abstraction has 1054 states and 1740 transitions. [2018-11-06 19:26:58,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:26:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1740 transitions. [2018-11-06 19:26:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-06 19:26:58,549 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:26:58,550 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:26:58,550 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:26:58,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:26:58,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1981784088, now seen corresponding path program 1 times [2018-11-06 19:26:58,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:26:58,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:26:58,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:26:58,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:26:58,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:26:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:26:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:26:58,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:26:58,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:26:58,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 19:26:58,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 19:26:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:26:58,765 INFO L87 Difference]: Start difference. First operand 1054 states and 1740 transitions. Second operand 5 states. [2018-11-06 19:27:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:02,897 INFO L93 Difference]: Finished difference Result 3096 states and 5155 transitions. [2018-11-06 19:27:02,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 19:27:02,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2018-11-06 19:27:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:02,912 INFO L225 Difference]: With dead ends: 3096 [2018-11-06 19:27:02,912 INFO L226 Difference]: Without dead ends: 2044 [2018-11-06 19:27:02,918 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:27:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2018-11-06 19:27:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2018-11-06 19:27:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-11-06 19:27:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3111 transitions. [2018-11-06 19:27:02,966 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3111 transitions. Word has length 86 [2018-11-06 19:27:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:02,967 INFO L480 AbstractCegarLoop]: Abstraction has 2044 states and 3111 transitions. [2018-11-06 19:27:02,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 19:27:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3111 transitions. [2018-11-06 19:27:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-11-06 19:27:02,985 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:02,985 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:27:02,986 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:02,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash -466720108, now seen corresponding path program 1 times [2018-11-06 19:27:02,987 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:02,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:02,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:02,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:02,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:03,600 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 19:27:03,935 WARN L179 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-11-06 19:27:04,307 WARN L179 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-11-06 19:27:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:27:04,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:27:04,823 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:27:04,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:04,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:27:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-06 19:27:05,313 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:27:05,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2018-11-06 19:27:05,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 19:27:05,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 19:27:05,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-11-06 19:27:05,316 INFO L87 Difference]: Start difference. First operand 2044 states and 3111 transitions. Second operand 8 states. [2018-11-06 19:27:07,096 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-06 19:27:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:16,938 INFO L93 Difference]: Finished difference Result 7716 states and 11157 transitions. [2018-11-06 19:27:16,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 19:27:16,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 253 [2018-11-06 19:27:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:16,971 INFO L225 Difference]: With dead ends: 7716 [2018-11-06 19:27:16,971 INFO L226 Difference]: Without dead ends: 5674 [2018-11-06 19:27:16,976 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2018-11-06 19:27:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2018-11-06 19:27:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5344. [2018-11-06 19:27:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2018-11-06 19:27:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 7393 transitions. [2018-11-06 19:27:17,095 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 7393 transitions. Word has length 253 [2018-11-06 19:27:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:17,096 INFO L480 AbstractCegarLoop]: Abstraction has 5344 states and 7393 transitions. [2018-11-06 19:27:17,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 19:27:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 7393 transitions. [2018-11-06 19:27:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-11-06 19:27:17,107 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:17,107 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-06 19:27:17,108 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:17,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash -696319355, now seen corresponding path program 1 times [2018-11-06 19:27:17,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:17,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:17,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:17,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:17,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:17,535 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-06 19:27:17,769 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-11-06 19:27:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-06 19:27:18,153 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:27:18,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-06 19:27:18,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 19:27:18,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 19:27:18,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-06 19:27:18,154 INFO L87 Difference]: Start difference. First operand 5344 states and 7393 transitions. Second operand 7 states. [2018-11-06 19:27:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:21,659 INFO L93 Difference]: Finished difference Result 11075 states and 15185 transitions. [2018-11-06 19:27:21,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 19:27:21,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 359 [2018-11-06 19:27:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:21,686 INFO L225 Difference]: With dead ends: 11075 [2018-11-06 19:27:21,687 INFO L226 Difference]: Without dead ends: 5733 [2018-11-06 19:27:21,694 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-11-06 19:27:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2018-11-06 19:27:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 5674. [2018-11-06 19:27:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5674 states. [2018-11-06 19:27:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5674 states to 5674 states and 7729 transitions. [2018-11-06 19:27:21,793 INFO L78 Accepts]: Start accepts. Automaton has 5674 states and 7729 transitions. Word has length 359 [2018-11-06 19:27:21,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:21,793 INFO L480 AbstractCegarLoop]: Abstraction has 5674 states and 7729 transitions. [2018-11-06 19:27:21,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 19:27:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5674 states and 7729 transitions. [2018-11-06 19:27:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-06 19:27:21,803 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:21,804 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:27:21,804 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:21,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:21,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1542528643, now seen corresponding path program 1 times [2018-11-06 19:27:21,805 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:21,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:21,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:21,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:21,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-06 19:27:22,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:27:22,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:27:22,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:27:22,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:27:22,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:27:22,281 INFO L87 Difference]: Start difference. First operand 5674 states and 7729 transitions. Second operand 4 states. [2018-11-06 19:27:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:26,111 INFO L93 Difference]: Finished difference Result 13986 states and 19291 transitions. [2018-11-06 19:27:26,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:27:26,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 412 [2018-11-06 19:27:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:26,140 INFO L225 Difference]: With dead ends: 13986 [2018-11-06 19:27:26,140 INFO L226 Difference]: Without dead ends: 7634 [2018-11-06 19:27:26,151 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:27:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2018-11-06 19:27:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 7634. [2018-11-06 19:27:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7634 states. [2018-11-06 19:27:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7634 states to 7634 states and 8369 transitions. [2018-11-06 19:27:26,278 INFO L78 Accepts]: Start accepts. Automaton has 7634 states and 8369 transitions. Word has length 412 [2018-11-06 19:27:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:26,279 INFO L480 AbstractCegarLoop]: Abstraction has 7634 states and 8369 transitions. [2018-11-06 19:27:26,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:27:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7634 states and 8369 transitions. [2018-11-06 19:27:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2018-11-06 19:27:26,301 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:26,302 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-06 19:27:26,302 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:26,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1353601167, now seen corresponding path program 1 times [2018-11-06 19:27:26,303 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:26,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:26,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:26,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:26,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:26,876 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 19:27:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 611 proven. 65 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-11-06 19:27:28,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:27:28,353 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:27:28,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:28,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:27:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-11-06 19:27:28,946 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:27:28,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2018-11-06 19:27:28,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 19:27:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 19:27:28,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-06 19:27:28,951 INFO L87 Difference]: Start difference. First operand 7634 states and 8369 transitions. Second operand 9 states. [2018-11-06 19:27:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:34,403 INFO L93 Difference]: Finished difference Result 14623 states and 16014 transitions. [2018-11-06 19:27:34,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 19:27:34,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 684 [2018-11-06 19:27:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:34,447 INFO L225 Difference]: With dead ends: 14623 [2018-11-06 19:27:34,447 INFO L226 Difference]: Without dead ends: 7980 [2018-11-06 19:27:34,458 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-11-06 19:27:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7980 states. [2018-11-06 19:27:34,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7980 to 7302. [2018-11-06 19:27:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7302 states. [2018-11-06 19:27:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7302 states to 7302 states and 7806 transitions. [2018-11-06 19:27:34,583 INFO L78 Accepts]: Start accepts. Automaton has 7302 states and 7806 transitions. Word has length 684 [2018-11-06 19:27:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:34,584 INFO L480 AbstractCegarLoop]: Abstraction has 7302 states and 7806 transitions. [2018-11-06 19:27:34,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 19:27:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7302 states and 7806 transitions. [2018-11-06 19:27:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2018-11-06 19:27:34,619 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:34,620 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:27:34,620 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:34,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 432003776, now seen corresponding path program 1 times [2018-11-06 19:27:34,621 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:34,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:34,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:34,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:34,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 1036 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-11-06 19:27:35,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:27:35,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:27:35,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:27:35,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:27:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:27:35,430 INFO L87 Difference]: Start difference. First operand 7302 states and 7806 transitions. Second operand 4 states. [2018-11-06 19:27:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:37,891 INFO L93 Difference]: Finished difference Result 17898 states and 19161 transitions. [2018-11-06 19:27:37,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:27:37,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 810 [2018-11-06 19:27:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:37,911 INFO L225 Difference]: With dead ends: 17898 [2018-11-06 19:27:37,911 INFO L226 Difference]: Without dead ends: 10260 [2018-11-06 19:27:37,919 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:27:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2018-11-06 19:27:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 9930. [2018-11-06 19:27:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9930 states. [2018-11-06 19:27:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9930 states to 9930 states and 10421 transitions. [2018-11-06 19:27:38,033 INFO L78 Accepts]: Start accepts. Automaton has 9930 states and 10421 transitions. Word has length 810 [2018-11-06 19:27:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:38,034 INFO L480 AbstractCegarLoop]: Abstraction has 9930 states and 10421 transitions. [2018-11-06 19:27:38,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:27:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 9930 states and 10421 transitions. [2018-11-06 19:27:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2018-11-06 19:27:38,066 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:38,067 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:27:38,068 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:38,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash -739423767, now seen corresponding path program 1 times [2018-11-06 19:27:38,068 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:38,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:38,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:38,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:38,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 1053 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-06 19:27:38,807 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:27:38,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:27:38,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:27:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:27:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:27:38,808 INFO L87 Difference]: Start difference. First operand 9930 states and 10421 transitions. Second operand 4 states. [2018-11-06 19:27:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:40,884 INFO L93 Difference]: Finished difference Result 19858 states and 20851 transitions. [2018-11-06 19:27:40,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:27:40,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 873 [2018-11-06 19:27:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:40,904 INFO L225 Difference]: With dead ends: 19858 [2018-11-06 19:27:40,905 INFO L226 Difference]: Without dead ends: 9926 [2018-11-06 19:27:40,914 INFO L604 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 [2018-11-06 19:27:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2018-11-06 19:27:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 9926. [2018-11-06 19:27:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9926 states. [2018-11-06 19:27:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 10260 transitions. [2018-11-06 19:27:41,025 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 10260 transitions. Word has length 873 [2018-11-06 19:27:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:41,026 INFO L480 AbstractCegarLoop]: Abstraction has 9926 states and 10260 transitions. [2018-11-06 19:27:41,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:27:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 10260 transitions. [2018-11-06 19:27:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1173 [2018-11-06 19:27:41,052 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:41,054 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:27:41,054 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:41,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1285557528, now seen corresponding path program 1 times [2018-11-06 19:27:41,055 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:41,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:41,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:41,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:41,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:41,943 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-11-06 19:27:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1458 proven. 0 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2018-11-06 19:27:42,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:27:42,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:27:42,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:27:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:27:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:27:42,951 INFO L87 Difference]: Start difference. First operand 9926 states and 10260 transitions. Second operand 4 states. [2018-11-06 19:27:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:45,181 INFO L93 Difference]: Finished difference Result 25130 states and 25980 transitions. [2018-11-06 19:27:45,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:27:45,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1172 [2018-11-06 19:27:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:45,212 INFO L225 Difference]: With dead ends: 25130 [2018-11-06 19:27:45,212 INFO L226 Difference]: Without dead ends: 14543 [2018-11-06 19:27:45,229 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:27:45,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14543 states. [2018-11-06 19:27:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14543 to 14543. [2018-11-06 19:27:45,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14543 states. [2018-11-06 19:27:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14543 states to 14543 states and 14934 transitions. [2018-11-06 19:27:45,430 INFO L78 Accepts]: Start accepts. Automaton has 14543 states and 14934 transitions. Word has length 1172 [2018-11-06 19:27:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:45,431 INFO L480 AbstractCegarLoop]: Abstraction has 14543 states and 14934 transitions. [2018-11-06 19:27:45,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:27:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 14543 states and 14934 transitions. [2018-11-06 19:27:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1253 [2018-11-06 19:27:45,465 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:45,466 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:27:45,467 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:45,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash 18154934, now seen corresponding path program 1 times [2018-11-06 19:27:45,467 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:45,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:45,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:45,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:45,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:46,448 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-06 19:27:46,762 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-11-06 19:27:47,145 WARN L179 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-11-06 19:27:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 1495 proven. 440 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2018-11-06 19:27:48,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:27:48,942 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 19:27:48,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:49,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:27:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 1716 proven. 0 refuted. 0 times theorem prover too weak. 1137 trivial. 0 not checked. [2018-11-06 19:27:50,357 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:27:50,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-11-06 19:27:50,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 19:27:50,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 19:27:50,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-06 19:27:50,366 INFO L87 Difference]: Start difference. First operand 14543 states and 14934 transitions. Second operand 9 states. [2018-11-06 19:27:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:53,307 INFO L93 Difference]: Finished difference Result 26245 states and 26981 transitions. [2018-11-06 19:27:53,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 19:27:53,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1252 [2018-11-06 19:27:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:53,326 INFO L225 Difference]: With dead ends: 26245 [2018-11-06 19:27:53,326 INFO L226 Difference]: Without dead ends: 14675 [2018-11-06 19:27:53,337 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 1253 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-06 19:27:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14675 states. [2018-11-06 19:27:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14675 to 14213. [2018-11-06 19:27:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14213 states. [2018-11-06 19:27:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14213 states to 14213 states and 14559 transitions. [2018-11-06 19:27:53,484 INFO L78 Accepts]: Start accepts. Automaton has 14213 states and 14559 transitions. Word has length 1252 [2018-11-06 19:27:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:27:53,485 INFO L480 AbstractCegarLoop]: Abstraction has 14213 states and 14559 transitions. [2018-11-06 19:27:53,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 19:27:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 14213 states and 14559 transitions. [2018-11-06 19:27:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1387 [2018-11-06 19:27:53,518 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:27:53,519 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:27:53,519 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:27:53,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:27:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash -865905874, now seen corresponding path program 1 times [2018-11-06 19:27:53,520 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:27:53,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:27:53,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:53,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:27:53,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:27:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:27:54,542 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-06 19:27:54,818 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-06 19:27:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3239 backedges. 2334 proven. 0 refuted. 0 times theorem prover too weak. 905 trivial. 0 not checked. [2018-11-06 19:27:57,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:27:57,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-06 19:27:57,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 19:27:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 19:27:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-06 19:27:57,089 INFO L87 Difference]: Start difference. First operand 14213 states and 14559 transitions. Second operand 6 states. [2018-11-06 19:27:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:27:59,963 INFO L93 Difference]: Finished difference Result 26117 states and 26779 transitions. [2018-11-06 19:27:59,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 19:27:59,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1386 [2018-11-06 19:27:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:27:59,975 INFO L225 Difference]: With dead ends: 26117 [2018-11-06 19:27:59,976 INFO L226 Difference]: Without dead ends: 14877 [2018-11-06 19:27:59,983 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-11-06 19:27:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14877 states. [2018-11-06 19:28:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14877 to 14543. [2018-11-06 19:28:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14543 states. [2018-11-06 19:28:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14543 states to 14543 states and 14893 transitions. [2018-11-06 19:28:00,131 INFO L78 Accepts]: Start accepts. Automaton has 14543 states and 14893 transitions. Word has length 1386 [2018-11-06 19:28:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:28:00,132 INFO L480 AbstractCegarLoop]: Abstraction has 14543 states and 14893 transitions. [2018-11-06 19:28:00,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 19:28:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 14543 states and 14893 transitions. [2018-11-06 19:28:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1420 [2018-11-06 19:28:00,169 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:28:00,170 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:28:00,170 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:28:00,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:28:00,171 INFO L82 PathProgramCache]: Analyzing trace with hash 994630025, now seen corresponding path program 1 times [2018-11-06 19:28:00,171 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:28:00,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:28:00,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:28:00,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:28:00,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:28:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:28:01,204 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 19:28:01,393 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-11-06 19:28:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3821 backedges. 1843 proven. 243 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-11-06 19:28:04,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:28:04,445 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 19:28:04,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:28:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:28:04,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:28:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3821 backedges. 1843 proven. 0 refuted. 0 times theorem prover too weak. 1978 trivial. 0 not checked. [2018-11-06 19:28:06,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:28:06,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-11-06 19:28:06,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 19:28:06,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 19:28:06,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-06 19:28:06,960 INFO L87 Difference]: Start difference. First operand 14543 states and 14893 transitions. Second operand 10 states. [2018-11-06 19:28:07,221 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 16 [2018-11-06 19:28:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:28:13,745 INFO L93 Difference]: Finished difference Result 28098 states and 28817 transitions. [2018-11-06 19:28:13,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 19:28:13,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1419 [2018-11-06 19:28:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:28:13,758 INFO L225 Difference]: With dead ends: 28098 [2018-11-06 19:28:13,759 INFO L226 Difference]: Without dead ends: 14211 [2018-11-06 19:28:13,769 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1434 GetRequests, 1418 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-06 19:28:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14211 states. [2018-11-06 19:28:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14211 to 13546. [2018-11-06 19:28:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13546 states. [2018-11-06 19:28:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13546 states to 13546 states and 13890 transitions. [2018-11-06 19:28:13,918 INFO L78 Accepts]: Start accepts. Automaton has 13546 states and 13890 transitions. Word has length 1419 [2018-11-06 19:28:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:28:13,919 INFO L480 AbstractCegarLoop]: Abstraction has 13546 states and 13890 transitions. [2018-11-06 19:28:13,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 19:28:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13546 states and 13890 transitions. [2018-11-06 19:28:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1451 [2018-11-06 19:28:13,950 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:28:13,951 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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, 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] [2018-11-06 19:28:13,951 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:28:13,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:28:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -407160884, now seen corresponding path program 1 times [2018-11-06 19:28:13,952 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:28:13,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:28:13,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:28:13,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:28:13,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:28:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:28:14,679 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-11-06 19:28:14,962 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-11-06 19:28:15,315 WARN L179 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-11-06 19:28:15,586 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2018-11-06 19:28:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 1938 proven. 158 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2018-11-06 19:28:17,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:28:17,676 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 19:28:17,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:28:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:28:18,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:28:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 2096 proven. 0 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2018-11-06 19:28:19,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:28:19,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-11-06 19:28:19,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 19:28:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 19:28:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-06 19:28:19,550 INFO L87 Difference]: Start difference. First operand 13546 states and 13890 transitions. Second operand 10 states. [2018-11-06 19:28:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:28:28,054 INFO L93 Difference]: Finished difference Result 37048 states and 37996 transitions. [2018-11-06 19:28:28,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 19:28:28,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1450 [2018-11-06 19:28:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:28:28,079 INFO L225 Difference]: With dead ends: 37048 [2018-11-06 19:28:28,079 INFO L226 Difference]: Without dead ends: 21586 [2018-11-06 19:28:28,091 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1480 GetRequests, 1460 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-11-06 19:28:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21586 states. [2018-11-06 19:28:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21586 to 17834. [2018-11-06 19:28:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17834 states. [2018-11-06 19:28:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17834 states to 17834 states and 18210 transitions. [2018-11-06 19:28:28,322 INFO L78 Accepts]: Start accepts. Automaton has 17834 states and 18210 transitions. Word has length 1450 [2018-11-06 19:28:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:28:28,323 INFO L480 AbstractCegarLoop]: Abstraction has 17834 states and 18210 transitions. [2018-11-06 19:28:28,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 19:28:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 17834 states and 18210 transitions. [2018-11-06 19:28:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2020 [2018-11-06 19:28:28,370 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:28:28,372 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2018-11-06 19:28:28,372 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:28:28,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:28:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash 638872038, now seen corresponding path program 1 times [2018-11-06 19:28:28,373 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:28:28,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:28:28,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:28:28,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:28:28,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:28:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:28:29,590 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 19:28:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 4046 proven. 1877 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2018-11-06 19:28:32,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:28:32,997 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 19:28:33,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:28:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:28:33,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:28:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 4689 proven. 0 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2018-11-06 19:28:36,233 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:28:36,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2018-11-06 19:28:36,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 19:28:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 19:28:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-06 19:28:36,236 INFO L87 Difference]: Start difference. First operand 17834 states and 18210 transitions. Second operand 12 states. [2018-11-06 19:28:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:28:49,119 INFO L93 Difference]: Finished difference Result 37316 states and 38112 transitions. [2018-11-06 19:28:49,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 19:28:49,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 2019 [2018-11-06 19:28:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:28:49,140 INFO L225 Difference]: With dead ends: 37316 [2018-11-06 19:28:49,140 INFO L226 Difference]: Without dead ends: 18157 [2018-11-06 19:28:49,154 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2043 GetRequests, 2025 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2018-11-06 19:28:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18157 states. [2018-11-06 19:28:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18157 to 17497. [2018-11-06 19:28:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17497 states. [2018-11-06 19:28:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17497 states to 17497 states and 17825 transitions. [2018-11-06 19:28:49,316 INFO L78 Accepts]: Start accepts. Automaton has 17497 states and 17825 transitions. Word has length 2019 [2018-11-06 19:28:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:28:49,317 INFO L480 AbstractCegarLoop]: Abstraction has 17497 states and 17825 transitions. [2018-11-06 19:28:49,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 19:28:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 17497 states and 17825 transitions. [2018-11-06 19:28:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2395 [2018-11-06 19:28:49,355 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:28:49,356 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:28:49,356 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:28:49,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:28:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1188760933, now seen corresponding path program 1 times [2018-11-06 19:28:49,357 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:28:49,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:28:49,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:28:49,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:28:49,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:28:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:28:50,910 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 19:28:51,235 WARN L179 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 19:28:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10474 backedges. 4368 proven. 251 refuted. 0 times theorem prover too weak. 5855 trivial. 0 not checked. [2018-11-06 19:28:57,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:28:57,763 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:28:57,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:28:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:28:58,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:29:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10474 backedges. 5518 proven. 0 refuted. 0 times theorem prover too weak. 4956 trivial. 0 not checked. [2018-11-06 19:29:02,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:29:02,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-11-06 19:29:02,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 19:29:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 19:29:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-06 19:29:02,329 INFO L87 Difference]: Start difference. First operand 17497 states and 17825 transitions. Second operand 10 states. [2018-11-06 19:29:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:29:14,175 INFO L93 Difference]: Finished difference Result 39552 states and 40337 transitions. [2018-11-06 19:29:14,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 19:29:14,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2394 [2018-11-06 19:29:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:29:14,195 INFO L225 Difference]: With dead ends: 39552 [2018-11-06 19:29:14,195 INFO L226 Difference]: Without dead ends: 21568 [2018-11-06 19:29:14,207 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2417 GetRequests, 2399 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-11-06 19:29:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21568 states. [2018-11-06 19:29:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21568 to 19791. [2018-11-06 19:29:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19791 states. [2018-11-06 19:29:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19791 states to 19791 states and 20093 transitions. [2018-11-06 19:29:14,417 INFO L78 Accepts]: Start accepts. Automaton has 19791 states and 20093 transitions. Word has length 2394 [2018-11-06 19:29:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:29:14,418 INFO L480 AbstractCegarLoop]: Abstraction has 19791 states and 20093 transitions. [2018-11-06 19:29:14,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 19:29:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 19791 states and 20093 transitions. [2018-11-06 19:29:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2518 [2018-11-06 19:29:14,468 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:29:14,469 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-11-06 19:29:14,470 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:29:14,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:29:14,470 INFO L82 PathProgramCache]: Analyzing trace with hash -556451108, now seen corresponding path program 1 times [2018-11-06 19:29:14,470 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:29:14,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:29:14,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:29:14,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:29:14,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:29:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:29:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10889 backedges. 923 proven. 15 refuted. 0 times theorem prover too weak. 9951 trivial. 0 not checked. [2018-11-06 19:29:19,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:29:19,063 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:29:19,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:29:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:29:19,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:29:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10889 backedges. 923 proven. 15 refuted. 0 times theorem prover too weak. 9951 trivial. 0 not checked. [2018-11-06 19:29:23,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 19:29:23,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-11-06 19:29:23,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 19:29:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 19:29:23,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-06 19:29:23,359 INFO L87 Difference]: Start difference. First operand 19791 states and 20093 transitions. Second operand 6 states. [2018-11-06 19:29:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:29:26,671 INFO L93 Difference]: Finished difference Result 42220 states and 42858 transitions. [2018-11-06 19:29:26,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 19:29:26,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 2517 [2018-11-06 19:29:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:29:26,694 INFO L225 Difference]: With dead ends: 42220 [2018-11-06 19:29:26,694 INFO L226 Difference]: Without dead ends: 22431 [2018-11-06 19:29:26,706 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2521 GetRequests, 2516 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-06 19:29:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22431 states. [2018-11-06 19:29:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22431 to 20781. [2018-11-06 19:29:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20781 states. [2018-11-06 19:29:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20781 states to 20781 states and 21088 transitions. [2018-11-06 19:29:26,907 INFO L78 Accepts]: Start accepts. Automaton has 20781 states and 21088 transitions. Word has length 2517 [2018-11-06 19:29:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:29:26,908 INFO L480 AbstractCegarLoop]: Abstraction has 20781 states and 21088 transitions. [2018-11-06 19:29:26,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 19:29:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 20781 states and 21088 transitions. [2018-11-06 19:29:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2672 [2018-11-06 19:29:26,961 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:29:26,962 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 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, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2018-11-06 19:29:26,962 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:29:26,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:29:26,963 INFO L82 PathProgramCache]: Analyzing trace with hash 560175035, now seen corresponding path program 1 times [2018-11-06 19:29:26,963 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:29:26,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:29:26,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:29:26,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:29:26,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:29:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:29:29,205 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-06 19:29:29,453 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-11-06 19:29:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12289 backedges. 9713 proven. 482 refuted. 0 times theorem prover too weak. 2094 trivial. 0 not checked. [2018-11-06 19:29:38,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:29:38,815 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:29:38,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:29:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:29:39,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:29:39,977 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-11-06 19:29:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12289 backedges. 9148 proven. 816 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2018-11-06 19:29:47,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 19:29:47,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2018-11-06 19:29:47,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 19:29:47,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 19:29:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-11-06 19:29:47,528 INFO L87 Difference]: Start difference. First operand 20781 states and 21088 transitions. Second operand 13 states. [2018-11-06 19:29:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:29:56,060 INFO L93 Difference]: Finished difference Result 39414 states and 40022 transitions. [2018-11-06 19:29:56,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 19:29:56,061 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 2671 [2018-11-06 19:29:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:29:56,084 INFO L225 Difference]: With dead ends: 39414 [2018-11-06 19:29:56,084 INFO L226 Difference]: Without dead ends: 22925 [2018-11-06 19:29:56,097 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2695 GetRequests, 2674 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2018-11-06 19:29:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22925 states. [2018-11-06 19:29:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22925 to 20451. [2018-11-06 19:29:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20451 states. [2018-11-06 19:29:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20451 states to 20451 states and 20730 transitions. [2018-11-06 19:29:56,347 INFO L78 Accepts]: Start accepts. Automaton has 20451 states and 20730 transitions. Word has length 2671 [2018-11-06 19:29:56,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:29:56,349 INFO L480 AbstractCegarLoop]: Abstraction has 20451 states and 20730 transitions. [2018-11-06 19:29:56,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 19:29:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 20451 states and 20730 transitions. [2018-11-06 19:29:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2740 [2018-11-06 19:29:56,419 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:29:56,420 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 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, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2018-11-06 19:29:56,420 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:29:56,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:29:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash 931094297, now seen corresponding path program 1 times [2018-11-06 19:29:56,422 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:29:56,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:29:56,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:29:56,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:29:56,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:29:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:29:58,176 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 19:29:58,482 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-11-06 19:30:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13119 backedges. 7051 proven. 2468 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2018-11-06 19:30:08,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:30:08,106 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:30:08,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:30:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:30:08,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:30:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13119 backedges. 7977 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2018-11-06 19:30:16,343 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:30:16,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 20 [2018-11-06 19:30:16,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 19:30:16,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 19:30:16,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-11-06 19:30:16,347 INFO L87 Difference]: Start difference. First operand 20451 states and 20730 transitions. Second operand 20 states. Received shutdown request... [2018-11-06 19:30:28,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 19:30:28,339 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 19:30:28,346 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 19:30:28,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 07:30:28 BoogieIcfgContainer [2018-11-06 19:30:28,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 19:30:28,347 INFO L168 Benchmark]: Toolchain (without parser) took 224441.96 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -199.9 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-06 19:30:28,349 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 19:30:28,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1092.33 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-06 19:30:28,350 INFO L168 Benchmark]: Boogie Procedure Inliner took 317.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -864.7 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-11-06 19:30:28,351 INFO L168 Benchmark]: Boogie Preprocessor took 191.92 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-11-06 19:30:28,351 INFO L168 Benchmark]: RCFGBuilder took 5810.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 271.0 MB). Peak memory consumption was 271.0 MB. Max. memory is 7.1 GB. [2018-11-06 19:30:28,352 INFO L168 Benchmark]: TraceAbstraction took 217024.30 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.6 GB in the end (delta: 295.5 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-06 19:30:28,357 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1092.33 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 317.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -864.7 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 191.92 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5810.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 271.0 MB). Peak memory consumption was 271.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217024.30 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.6 GB in the end (delta: 295.5 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 55). Cancelled while BasicCegarLoop was constructing difference of abstraction (20451states) and FLOYD_HOARE automaton (currently 22 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (5469 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 216.9s OverallTime, 18 OverallIterations, 14 TraceHistogramMax, 112.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3205 SDtfs, 37425 SDslu, 2078 SDs, 0 SdLazy, 85132 SolverSat, 5597 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 90.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17642 GetRequests, 17447 SyntacticMatches, 28 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20781occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 13171 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 52.6s InterpolantComputationTime, 39911 NumberOfCodeBlocks, 39911 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 39883 ConstructedInterpolants, 680 QuantifiedInterpolants, 284687917 SizeOfPredicates, 7 NumberOfNonLiveVariables, 19943 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 28 InterpolantComputations, 16 PerfectInterpolantSequences, 135603/142440 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown