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/sum03_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:18:26,973 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:18:26,976 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:18:26,992 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:18:26,992 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:18:26,993 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:18:26,994 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:18:26,996 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:18:26,998 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:18:26,998 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:18:26,999 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:18:27,000 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:18:27,000 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:18:27,002 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:18:27,003 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:18:27,004 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:18:27,005 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:18:27,009 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:18:27,014 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:18:27,016 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:18:27,018 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:18:27,020 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:18:27,024 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 22:18:27,024 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 22:18:27,024 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 22:18:27,025 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 22:18:27,026 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 22:18:27,029 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 22:18:27,030 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 22:18:27,032 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 22:18:27,033 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 22:18:27,033 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 22:18:27,035 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 22:18:27,058 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:18:27,058 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:18:27,059 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:18:27,059 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:18:27,060 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:18:27,060 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:18:27,060 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:18:27,061 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:18:27,061 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:18:27,061 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:18:27,061 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:18:27,061 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:18:27,062 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:18:27,062 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:18:27,062 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:18:27,062 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:18:27,062 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:18:27,063 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:18:27,064 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:18:27,064 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:18:27,064 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:18:27,064 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:18:27,065 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:18:27,065 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:18:27,065 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:18:27,065 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:18:27,065 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:18:27,066 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:18:27,123 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:18:27,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:18:27,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:18:27,141 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:18:27,142 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:18:27,143 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i [2018-10-26 22:18:27,209 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b1f63f5ea/55d6689c900b46a0961873281033f08f/FLAG160d9c8c4 [2018-10-26 22:18:27,601 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:18:27,602 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i [2018-10-26 22:18:27,607 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b1f63f5ea/55d6689c900b46a0961873281033f08f/FLAG160d9c8c4 [2018-10-26 22:18:27,626 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b1f63f5ea/55d6689c900b46a0961873281033f08f [2018-10-26 22:18:27,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:18:27,637 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:18:27,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:18:27,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:18:27,642 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:18:27,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be2feca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27, skipping insertion in model container [2018-10-26 22:18:27,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:18:27,676 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:18:27,878 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:18:27,882 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:18:27,899 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:18:27,915 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:18:27,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27 WrapperNode [2018-10-26 22:18:27,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:18:27,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:18:27,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:18:27,917 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:18:27,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:18:27,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:18:27,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:18:27,953 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:18:27,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... [2018-10-26 22:18:27,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:18:27,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:18:27,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:18:27,977 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:18:27,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:18:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:18:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:18:28,424 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:18:28,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:18:28 BoogieIcfgContainer [2018-10-26 22:18:28,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:18:28,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:18:28,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:18:28,429 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:18:28,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:18:27" (1/3) ... [2018-10-26 22:18:28,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a716dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:18:28, skipping insertion in model container [2018-10-26 22:18:28,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:18:27" (2/3) ... [2018-10-26 22:18:28,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a716dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:18:28, skipping insertion in model container [2018-10-26 22:18:28,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:18:28" (3/3) ... [2018-10-26 22:18:28,433 INFO L112 eAbstractionObserver]: Analyzing ICFG sum03_false-unreach-call_true-termination.i [2018-10-26 22:18:28,442 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:18:28,448 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:18:28,463 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:18:28,495 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:18:28,496 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:18:28,496 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:18:28,496 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:18:28,497 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:18:28,497 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:18:28,497 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:18:28,497 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:18:28,497 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:18:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-26 22:18:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-26 22:18:28,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:18:28,520 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:18:28,522 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:18:28,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:18:28,530 INFO L82 PathProgramCache]: Analyzing trace with hash 150935469, now seen corresponding path program 1 times [2018-10-26 22:18:28,532 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:18:28,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:18:28,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:28,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:18:28,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:18:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:28,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:18:28,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 22:18:28,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 22:18:28,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 22:18:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:18:28,810 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2018-10-26 22:18:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:18:28,943 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2018-10-26 22:18:28,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:18:28,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-26 22:18:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:18:28,959 INFO L225 Difference]: With dead ends: 32 [2018-10-26 22:18:28,959 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 22:18:28,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:18:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 22:18:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-10-26 22:18:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 22:18:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-26 22:18:29,001 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2018-10-26 22:18:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:18:29,001 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-26 22:18:29,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 22:18:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-26 22:18:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-26 22:18:29,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:18:29,002 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:18:29,003 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:18:29,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:18:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash 150875887, now seen corresponding path program 1 times [2018-10-26 22:18:29,003 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:18:29,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:18:29,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:29,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:18:29,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:18:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:29,169 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:18:29,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:18:29,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:18:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:18:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:18:29,172 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-10-26 22:18:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:18:31,546 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-10-26 22:18:31,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:18:31,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-26 22:18:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:18:31,547 INFO L225 Difference]: With dead ends: 30 [2018-10-26 22:18:31,547 INFO L226 Difference]: Without dead ends: 28 [2018-10-26 22:18:31,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:18:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-26 22:18:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-10-26 22:18:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-26 22:18:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-10-26 22:18:31,556 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2018-10-26 22:18:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:18:31,557 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-10-26 22:18:31,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:18:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-10-26 22:18:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 22:18:31,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:18:31,559 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:18:31,559 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:18:31,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:18:31,560 INFO L82 PathProgramCache]: Analyzing trace with hash -866095302, now seen corresponding path program 1 times [2018-10-26 22:18:31,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:18:31,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:18:31,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:31,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:18:31,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:18:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:18:31,642 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:18:31,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 22:18:31,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 22:18:31,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 22:18:31,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:18:31,644 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2018-10-26 22:18:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:18:31,698 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-10-26 22:18:31,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:18:31,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-10-26 22:18:31,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:18:31,699 INFO L225 Difference]: With dead ends: 34 [2018-10-26 22:18:31,699 INFO L226 Difference]: Without dead ends: 20 [2018-10-26 22:18:31,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:18:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-26 22:18:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-10-26 22:18:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-26 22:18:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-26 22:18:31,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-26 22:18:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:18:31,705 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-26 22:18:31,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 22:18:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-26 22:18:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 22:18:31,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:18:31,706 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:18:31,707 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:18:31,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:18:31,707 INFO L82 PathProgramCache]: Analyzing trace with hash -473008710, now seen corresponding path program 2 times [2018-10-26 22:18:31,707 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:18:31,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:18:31,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:31,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:18:31,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:18:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:31,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:18:31,933 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:18:31,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:18:31,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:18:31,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:18:31,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:18:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:32,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:18:32,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-26 22:18:32,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 22:18:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 22:18:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:18:32,062 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2018-10-26 22:18:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:18:32,095 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-26 22:18:32,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 22:18:32,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-26 22:18:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:18:32,097 INFO L225 Difference]: With dead ends: 34 [2018-10-26 22:18:32,097 INFO L226 Difference]: Without dead ends: 26 [2018-10-26 22:18:32,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:18:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-26 22:18:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-26 22:18:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-26 22:18:32,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-26 22:18:32,104 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2018-10-26 22:18:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:18:32,105 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-26 22:18:32,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 22:18:32,105 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-26 22:18:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:18:32,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:18:32,106 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-26 22:18:32,106 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:18:32,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:18:32,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1624266247, now seen corresponding path program 3 times [2018-10-26 22:18:32,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:18:32,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:18:32,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:32,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:18:32,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:18:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:32,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:18:32,223 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:18:32,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:18:44,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-26 22:18:44,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:18:44,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:18:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:44,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:18:44,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-26 22:18:44,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:18:44,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:18:44,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:18:44,259 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2018-10-26 22:18:44,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:18:44,333 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-10-26 22:18:44,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:18:44,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-26 22:18:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:18:44,335 INFO L225 Difference]: With dead ends: 40 [2018-10-26 22:18:44,335 INFO L226 Difference]: Without dead ends: 32 [2018-10-26 22:18:44,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:18:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-26 22:18:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-26 22:18:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-26 22:18:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-26 22:18:44,343 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2018-10-26 22:18:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:18:44,344 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-26 22:18:44,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:18:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-26 22:18:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 22:18:44,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:18:44,345 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-26 22:18:44,345 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:18:44,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:18:44,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1238759276, now seen corresponding path program 4 times [2018-10-26 22:18:44,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:18:44,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:18:44,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:44,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:18:44,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:18:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:44,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:18:44,593 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) [2018-10-26 22:18:44,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:18:44,653 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:18:44,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:18:44,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:18:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:44,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:18:44,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 22:18:44,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:18:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:18:44,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:18:44,732 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2018-10-26 22:18:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:18:44,888 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-10-26 22:18:44,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:18:44,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-10-26 22:18:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:18:44,890 INFO L225 Difference]: With dead ends: 46 [2018-10-26 22:18:44,891 INFO L226 Difference]: Without dead ends: 38 [2018-10-26 22:18:44,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:18:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-26 22:18:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-26 22:18:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-26 22:18:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-26 22:18:44,898 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 26 [2018-10-26 22:18:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:18:44,898 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-26 22:18:44,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:18:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-26 22:18:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 22:18:44,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:18:44,900 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-26 22:18:44,900 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:18:44,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:18:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash 482663777, now seen corresponding path program 5 times [2018-10-26 22:18:44,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:18:44,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:18:44,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:44,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:18:44,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:18:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:45,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:18:45,093 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:18:45,105 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:18:45,284 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-26 22:18:45,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:18:45,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:18:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:45,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:18:45,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-26 22:18:45,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:18:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:18:45,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:18:45,396 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2018-10-26 22:18:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:18:45,555 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2018-10-26 22:18:45,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:18:45,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2018-10-26 22:18:45,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:18:45,560 INFO L225 Difference]: With dead ends: 52 [2018-10-26 22:18:45,560 INFO L226 Difference]: Without dead ends: 44 [2018-10-26 22:18:45,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:18:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-26 22:18:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-10-26 22:18:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-26 22:18:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-26 22:18:45,567 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2018-10-26 22:18:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:18:45,568 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-26 22:18:45,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:18:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-26 22:18:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:18:45,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:18:45,570 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-26 22:18:45,570 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:18:45,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:18:45,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1387387794, now seen corresponding path program 6 times [2018-10-26 22:18:45,570 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:18:45,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:18:45,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:45,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:18:45,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:18:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:18:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:18:45,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:18:45,892 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 [2018-10-26 22:18:45,908 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:18:46,264 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-26 22:18:46,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:18:46,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:18:46,910 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 27 [2018-10-26 22:19:19,831 WARN L179 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-10-26 22:19:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 68 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:19:19,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:19:19,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 19 [2018-10-26 22:19:19,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 22:19:19,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 22:19:19,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=290, Unknown=10, NotChecked=0, Total=342 [2018-10-26 22:19:19,908 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 19 states. [2018-10-26 22:19:45,888 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-10-26 22:20:45,963 WARN L179 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2018-10-26 22:21:20,488 WARN L179 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 59 DAG size of output: 8 [2018-10-26 22:21:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:21:28,018 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-10-26 22:21:28,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:21:28,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2018-10-26 22:21:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:21:28,019 INFO L225 Difference]: With dead ends: 58 [2018-10-26 22:21:28,020 INFO L226 Difference]: Without dead ends: 50 [2018-10-26 22:21:28,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 78.7s TimeCoverageRelationStatistics Valid=83, Invalid=594, Unknown=25, NotChecked=0, Total=702 [2018-10-26 22:21:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-26 22:21:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-10-26 22:21:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-26 22:21:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-26 22:21:28,039 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2018-10-26 22:21:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:21:28,040 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-26 22:21:28,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 22:21:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-26 22:21:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 22:21:28,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:21:28,043 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-26 22:21:28,045 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:21:28,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:21:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2100768187, now seen corresponding path program 7 times [2018-10-26 22:21:28,045 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:21:28,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:21:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:28,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:21:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:21:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:21:28,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:21:28,337 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 [2018-10-26 22:21:28,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:21:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:21:28,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:21:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:21:28,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:21:28,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 22:21:28,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:21:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:21:28,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:21:28,413 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 9 states. [2018-10-26 22:21:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:21:28,760 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2018-10-26 22:21:28,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:21:28,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-10-26 22:21:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:21:28,765 INFO L225 Difference]: With dead ends: 64 [2018-10-26 22:21:28,765 INFO L226 Difference]: Without dead ends: 56 [2018-10-26 22:21:28,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:21:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-26 22:21:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-10-26 22:21:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-26 22:21:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-26 22:21:28,775 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 44 [2018-10-26 22:21:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:21:28,775 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-26 22:21:28,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:21:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-26 22:21:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:21:28,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:21:28,777 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-26 22:21:28,777 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:21:28,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:21:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash -72005304, now seen corresponding path program 8 times [2018-10-26 22:21:28,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:21:28,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:21:28,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:28,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:21:28,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:21:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:21:29,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:21:29,067 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 [2018-10-26 22:21:29,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:21:29,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:21:29,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:21:29,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:21:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:21:29,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:21:29,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-26 22:21:29,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 22:21:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 22:21:29,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:21:29,150 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 10 states. [2018-10-26 22:21:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:21:29,349 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2018-10-26 22:21:29,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 22:21:29,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2018-10-26 22:21:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:21:29,351 INFO L225 Difference]: With dead ends: 70 [2018-10-26 22:21:29,352 INFO L226 Difference]: Without dead ends: 62 [2018-10-26 22:21:29,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:21:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-26 22:21:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-10-26 22:21:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-26 22:21:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-26 22:21:29,361 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 50 [2018-10-26 22:21:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:21:29,362 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-26 22:21:29,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 22:21:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-26 22:21:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:21:29,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:21:29,363 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-26 22:21:29,364 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:21:29,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:21:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1899903211, now seen corresponding path program 9 times [2018-10-26 22:21:29,364 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:21:29,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:21:29,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:29,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:21:29,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:21:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 16 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:21:29,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:21:29,567 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 [2018-10-26 22:21:29,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:21:45,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-26 22:21:45,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:21:45,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:21:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 16 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:21:46,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:21:46,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 22:21:46,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:21:46,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:21:46,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:21:46,054 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 11 states. [2018-10-26 22:21:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:21:46,672 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-10-26 22:21:46,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:21:46,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-10-26 22:21:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:21:46,674 INFO L225 Difference]: With dead ends: 76 [2018-10-26 22:21:46,674 INFO L226 Difference]: Without dead ends: 68 [2018-10-26 22:21:46,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:21:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-26 22:21:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2018-10-26 22:21:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-26 22:21:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-26 22:21:46,683 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 56 [2018-10-26 22:21:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:21:46,684 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-26 22:21:46,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:21:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-26 22:21:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:21:46,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:21:46,685 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-26 22:21:46,685 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:21:46,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:21:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1880749858, now seen corresponding path program 10 times [2018-10-26 22:21:46,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:21:46,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:21:46,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:46,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:21:46,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:21:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 18 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:21:47,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:21:47,031 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 22:21:47,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:21:47,096 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:21:47,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:21:47,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:21:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 18 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:21:47,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:21:47,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-26 22:21:47,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 22:21:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 22:21:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:21:47,212 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 12 states. [2018-10-26 22:21:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:21:47,463 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2018-10-26 22:21:47,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:21:47,464 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2018-10-26 22:21:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:21:47,465 INFO L225 Difference]: With dead ends: 82 [2018-10-26 22:21:47,465 INFO L226 Difference]: Without dead ends: 74 [2018-10-26 22:21:47,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:21:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-26 22:21:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-10-26 22:21:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-26 22:21:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-26 22:21:47,477 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 62 [2018-10-26 22:21:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:21:47,477 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-26 22:21:47,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 22:21:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-26 22:21:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:21:47,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:21:47,478 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-26 22:21:47,479 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:21:47,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:21:47,479 INFO L82 PathProgramCache]: Analyzing trace with hash -901830289, now seen corresponding path program 11 times [2018-10-26 22:21:47,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:21:47,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:21:47,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:47,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:21:47,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:21:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 22:21:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 22:21:47,571 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 22:21:47,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:21:47 BoogieIcfgContainer [2018-10-26 22:21:47,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:21:47,603 INFO L168 Benchmark]: Toolchain (without parser) took 199967.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.8 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -183.3 MB). Peak memory consumption was 568.5 MB. Max. memory is 7.1 GB. [2018-10-26 22:21:47,604 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:21:47,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.80 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: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2018-10-26 22:21:47,605 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.58 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. [2018-10-26 22:21:47,606 INFO L168 Benchmark]: Boogie Preprocessor took 23.37 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. [2018-10-26 22:21:47,606 INFO L168 Benchmark]: RCFGBuilder took 448.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.0 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-26 22:21:47,607 INFO L168 Benchmark]: TraceAbstraction took 199176.14 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 608.5 MB). Peak memory consumption was 608.5 MB. Max. memory is 7.1 GB. [2018-10-26 22:21:47,612 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.80 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: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.58 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 23.37 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 448.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.0 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 199176.14 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 608.5 MB). Peak memory consumption was 608.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int sn=0; [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L12] unsigned int x=0; [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND FALSE !(x<10) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. UNSAFE Result, 199.1s OverallTime, 13 OverallIterations, 11 TraceHistogramMax, 132.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 271 SDtfs, 46 SDslu, 1555 SDs, 0 SdLazy, 1054 SolverSat, 7 SolverUnsat, 32 SolverUnknown, 0 SolverNotchecked, 85.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 439 GetRequests, 338 SyntacticMatches, 19 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 80.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 18 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 29.0s SatisfiabilityAnalysisTime, 36.5s InterpolantComputationTime, 782 NumberOfCodeBlocks, 776 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 693 ConstructedInterpolants, 23 QuantifiedInterpolants, 221868 SizeOfPredicates, 17 NumberOfNonLiveVariables, 743 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 185/1895 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...