java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:36:06,297 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:36:06,299 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:36:06,312 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:36:06,312 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:36:06,313 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:36:06,314 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:36:06,316 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:36:06,320 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:36:06,321 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:36:06,324 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:36:06,325 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:36:06,326 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:36:06,327 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:36:06,328 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:36:06,329 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:36:06,332 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:36:06,334 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:36:06,343 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:36:06,345 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:36:06,347 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:36:06,348 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:36:06,351 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:36:06,351 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:36:06,351 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:36:06,352 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:36:06,353 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:36:06,354 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:36:06,355 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:36:06,356 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:36:06,356 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:36:06,357 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 15:36:06,357 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 15:36:06,358 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 15:36:06,359 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 15:36:06,359 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 15:36:06,360 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:36:06,375 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:36:06,376 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:36:06,377 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:36:06,377 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:36:06,378 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:36:06,378 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:36:06,378 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:36:06,378 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:36:06,378 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:36:06,379 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:36:06,379 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:36:06,379 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:36:06,379 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:36:06,379 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:36:06,379 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:36:06,380 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:36:06,380 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:36:06,380 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:36:06,380 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:36:06,381 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:06,381 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:36:06,381 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:36:06,381 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:36:06,381 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:36:06,382 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:36:06,382 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:36:06,382 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:36:06,382 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:36:06,427 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:36:06,450 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:36:06,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:36:06,456 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:36:06,456 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:36:06,457 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i [2018-10-22 15:36:06,520 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8127137fe/691ed5d2e5544f41bfe112e218559e29/FLAG67d767cf5 [2018-10-22 15:36:06,980 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:36:06,981 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i [2018-10-22 15:36:06,988 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8127137fe/691ed5d2e5544f41bfe112e218559e29/FLAG67d767cf5 [2018-10-22 15:36:07,010 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8127137fe/691ed5d2e5544f41bfe112e218559e29 [2018-10-22 15:36:07,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:36:07,025 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:36:07,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:07,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:36:07,030 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:36:07,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a72f22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07, skipping insertion in model container [2018-10-22 15:36:07,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:36:07,072 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:36:07,278 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:07,283 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:36:07,303 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:07,322 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:36:07,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07 WrapperNode [2018-10-22 15:36:07,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:07,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:07,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:36:07,325 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:36:07,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:07,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:36:07,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:36:07,371 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:36:07,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... [2018-10-22 15:36:07,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:36:07,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:36:07,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:36:07,408 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:36:07,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:36:07,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:36:07,770 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:36:07,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:07 BoogieIcfgContainer [2018-10-22 15:36:07,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:36:07,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:36:07,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:36:07,776 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:36:07,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:36:07" (1/3) ... [2018-10-22 15:36:07,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569f865e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:07, skipping insertion in model container [2018-10-22 15:36:07,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:07" (2/3) ... [2018-10-22 15:36:07,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569f865e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:07, skipping insertion in model container [2018-10-22 15:36:07,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:07" (3/3) ... [2018-10-22 15:36:07,779 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_false-unreach-call_true-termination.i [2018-10-22 15:36:07,790 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:36:07,798 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:36:07,816 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:36:07,850 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:36:07,851 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:36:07,851 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:36:07,851 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:36:07,852 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:36:07,852 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:36:07,852 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:36:07,852 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:36:07,852 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:36:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-22 15:36:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:36:07,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:07,876 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:36:07,879 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:07,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-10-22 15:36:07,888 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:07,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:07,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:07,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:07,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:08,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:08,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:36:08,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:36:08,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:36:08,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:08,039 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-22 15:36:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:08,054 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-22 15:36:08,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:36:08,056 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:36:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:08,064 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:36:08,065 INFO L226 Difference]: Without dead ends: 10 [2018-10-22 15:36:08,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:08,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-22 15:36:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-22 15:36:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-22 15:36:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-22 15:36:08,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2018-10-22 15:36:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:08,112 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-22 15:36:08,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:36:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-22 15:36:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:36:08,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:08,113 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:08,115 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:08,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1805899826, now seen corresponding path program 1 times [2018-10-22 15:36:08,115 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:08,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:08,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:08,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:08,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:08,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:08,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:36:08,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:08,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:08,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:08,319 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2018-10-22 15:36:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:08,559 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-22 15:36:08,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:08,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-22 15:36:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:08,561 INFO L225 Difference]: With dead ends: 18 [2018-10-22 15:36:08,561 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:36:08,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:36:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:36:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:36:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-22 15:36:08,569 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-10-22 15:36:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:08,572 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-22 15:36:08,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-22 15:36:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:36:08,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:08,574 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:08,574 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:08,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:08,575 INFO L82 PathProgramCache]: Analyzing trace with hash -466386423, now seen corresponding path program 1 times [2018-10-22 15:36:08,575 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:08,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:08,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:08,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:08,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:09,098 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-22 15:36:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:09,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:09,251 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:09,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:09,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:09,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:09,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-22 15:36:09,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:36:09,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:36:09,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:36:09,803 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 13 states. [2018-10-22 15:36:10,355 WARN L179 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-10-22 15:36:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:10,582 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2018-10-22 15:36:10,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:36:10,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-10-22 15:36:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:10,585 INFO L225 Difference]: With dead ends: 38 [2018-10-22 15:36:10,585 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 15:36:10,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:36:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 15:36:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-10-22 15:36:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:36:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-22 15:36:10,592 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2018-10-22 15:36:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:10,593 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-22 15:36:10,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:36:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-22 15:36:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:36:10,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:10,594 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:10,594 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:10,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1824047545, now seen corresponding path program 1 times [2018-10-22 15:36:10,595 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:10,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:10,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:10,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:10,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:10,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:10,680 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:10,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:10,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:10,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:10,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:36:10,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:36:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:36:10,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:10,740 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2018-10-22 15:36:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:10,784 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-22 15:36:10,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:36:10,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-10-22 15:36:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:10,786 INFO L225 Difference]: With dead ends: 30 [2018-10-22 15:36:10,786 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 15:36:10,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 15:36:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-22 15:36:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:36:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-22 15:36:10,792 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-10-22 15:36:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:10,793 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-22 15:36:10,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:36:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-22 15:36:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:36:10,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:10,794 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:10,794 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:10,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash 49040183, now seen corresponding path program 2 times [2018-10-22 15:36:10,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:10,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:10,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:10,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:10,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-22 15:36:11,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:11,139 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:11,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:11,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:36:11,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:11,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:11,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:11,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 18 [2018-10-22 15:36:11,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:36:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:36:11,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:36:11,581 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states. [2018-10-22 15:36:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:12,556 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-10-22 15:36:12,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:36:12,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2018-10-22 15:36:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:12,559 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:36:12,559 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:36:12,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:36:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:36:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-22 15:36:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:36:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-22 15:36:12,566 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2018-10-22 15:36:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:12,566 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-22 15:36:12,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:36:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-22 15:36:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:36:12,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:12,568 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:12,568 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:12,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1293648665, now seen corresponding path program 2 times [2018-10-22 15:36:12,569 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:12,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:12,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:12,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:12,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:12,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:12,657 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:12,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:12,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:36:12,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:12,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:12,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:12,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:36:12,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:36:12,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:36:12,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:12,714 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2018-10-22 15:36:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:12,780 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-10-22 15:36:12,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:36:12,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-10-22 15:36:12,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:12,782 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:36:12,782 INFO L226 Difference]: Without dead ends: 34 [2018-10-22 15:36:12,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-22 15:36:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-22 15:36:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 15:36:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-10-22 15:36:12,789 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2018-10-22 15:36:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:12,789 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-10-22 15:36:12,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:36:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-10-22 15:36:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:36:12,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:12,791 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:12,791 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:12,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:12,792 INFO L82 PathProgramCache]: Analyzing trace with hash -595864258, now seen corresponding path program 3 times [2018-10-22 15:36:12,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:12,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:12,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:12,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:12,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:13,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:13,005 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:13,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:36:13,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-22 15:36:13,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:13,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:13,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:13,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:36:13,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:36:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:36:13,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:36:13,062 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2018-10-22 15:36:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:13,108 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-10-22 15:36:13,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:36:13,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-10-22 15:36:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:13,109 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:36:13,110 INFO L226 Difference]: Without dead ends: 38 [2018-10-22 15:36:13,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:36:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-22 15:36:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-22 15:36:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 15:36:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-22 15:36:13,117 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2018-10-22 15:36:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:13,117 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-22 15:36:13,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:36:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-22 15:36:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 15:36:13,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:13,119 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:13,119 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:13,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1064380949, now seen corresponding path program 4 times [2018-10-22 15:36:13,120 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:13,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:13,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:13,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:13,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:13,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:13,243 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:13,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:36:13,276 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:36:13,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:13,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:13,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:13,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:36:13,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:36:13,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:36:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:13,311 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2018-10-22 15:36:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:13,680 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-10-22 15:36:13,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:36:13,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-10-22 15:36:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:13,682 INFO L225 Difference]: With dead ends: 50 [2018-10-22 15:36:13,683 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:36:13,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:36:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-22 15:36:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:36:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-22 15:36:13,690 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2018-10-22 15:36:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:13,690 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-22 15:36:13,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:36:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-22 15:36:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 15:36:13,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:13,692 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:13,692 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:13,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -881706132, now seen corresponding path program 5 times [2018-10-22 15:36:13,693 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:13,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:13,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:13,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:13,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:13,833 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:36:13,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:36:13,863 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-22 15:36:13,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:13,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:13,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:13,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-22 15:36:13,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:36:13,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:36:13,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:36:13,903 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-10-22 15:36:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:13,991 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2018-10-22 15:36:13,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:36:13,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-10-22 15:36:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:13,992 INFO L225 Difference]: With dead ends: 54 [2018-10-22 15:36:13,992 INFO L226 Difference]: Without dead ends: 46 [2018-10-22 15:36:13,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:36:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-22 15:36:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-10-22 15:36:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-22 15:36:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-22 15:36:13,999 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2018-10-22 15:36:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:14,000 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-22 15:36:14,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:36:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-22 15:36:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:36:14,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:14,002 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:14,002 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:14,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:14,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1665976643, now seen corresponding path program 6 times [2018-10-22 15:36:14,003 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:14,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:14,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:14,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:14,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:14,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:14,141 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:36:14,151 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:36:14,176 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-22 15:36:14,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:14,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:14,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:14,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:36:14,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:36:14,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:36:14,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:36:14,214 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 11 states. [2018-10-22 15:36:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:14,290 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-10-22 15:36:14,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:36:14,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-10-22 15:36:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:14,292 INFO L225 Difference]: With dead ends: 58 [2018-10-22 15:36:14,292 INFO L226 Difference]: Without dead ends: 50 [2018-10-22 15:36:14,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:36:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-22 15:36:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-10-22 15:36:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-22 15:36:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-22 15:36:14,299 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2018-10-22 15:36:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:14,299 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-22 15:36:14,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:36:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-22 15:36:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:36:14,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:14,301 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:14,301 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:14,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1290703770, now seen corresponding path program 7 times [2018-10-22 15:36:14,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:14,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:14,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:14,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:14,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:36:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:36:14,348 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 15:36:14,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:36:14 BoogieIcfgContainer [2018-10-22 15:36:14,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:36:14,374 INFO L168 Benchmark]: Toolchain (without parser) took 7350.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -391.6 MB). Peak memory consumption was 355.0 MB. Max. memory is 7.1 GB. [2018-10-22 15:36:14,375 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:36:14,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:36:14,377 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:36:14,377 INFO L168 Benchmark]: Boogie Preprocessor took 29.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:36:14,378 INFO L168 Benchmark]: RCFGBuilder took 364.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -799.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:36:14,379 INFO L168 Benchmark]: TraceAbstraction took 6601.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 397.7 MB). Peak memory consumption was 397.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:36:14,384 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 296.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 364.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -799.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6601.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 397.7 MB). Peak memory consumption was 397.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. UNSAFE Result, 6.5s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 86 SDtfs, 73 SDslu, 284 SDs, 0 SdLazy, 470 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 313 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=10, 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: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 508 NumberOfCodeBlocks, 508 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 443 ConstructedInterpolants, 0 QuantifiedInterpolants, 40857 SizeOfPredicates, 16 NumberOfNonLiveVariables, 426 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 224/1096 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...