java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:57:35,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:57:35,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:57:35,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:57:35,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:57:35,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:57:35,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:57:35,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:57:35,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:57:35,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:57:35,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:57:35,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:57:35,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:57:35,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:57:35,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:57:35,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:57:35,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:57:35,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:57:35,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:57:35,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:57:35,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:57:35,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:57:35,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:57:35,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:57:35,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 12:57:35,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 12:57:35,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 12:57:35,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 12:57:35,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 12:57:35,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 12:57:35,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:57:35,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:57:35,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:57:35,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:57:35,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:57:35,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:57:35,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:57:35,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:57:35,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:57:35,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:57:35,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:57:35,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 12:57:35,900 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:57:35,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:57:35,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:57:35,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:57:35,902 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:57:35,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:57:35,903 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:57:35,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:57:35,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:57:35,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:57:35,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:57:35,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:57:35,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:57:35,904 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:57:35,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:57:35,904 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:57:35,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:57:35,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:57:35,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:57:35,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:57:35,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:57:35,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:35,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:57:35,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:57:35,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:57:35,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:57:35,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:57:35,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:57:35,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:57:35,934 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:57:35,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:57:35,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:57:35,951 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:57:35,951 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:57:35,952 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2019-09-20 12:57:36,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb7a76d7/5f85bd74555940ed9b51deafca0bc4c5/FLAGc945c6219 [2019-09-20 12:57:36,474 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:57:36,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2019-09-20 12:57:36,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb7a76d7/5f85bd74555940ed9b51deafca0bc4c5/FLAGc945c6219 [2019-09-20 12:57:36,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb7a76d7/5f85bd74555940ed9b51deafca0bc4c5 [2019-09-20 12:57:36,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:57:36,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:57:36,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:36,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:57:36,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:57:36,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:36" (1/1) ... [2019-09-20 12:57:36,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38cfb177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:36, skipping insertion in model container [2019-09-20 12:57:36,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:36" (1/1) ... [2019-09-20 12:57:36,942 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:57:36,956 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:57:37,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:37,167 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:57:37,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:37,193 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:57:37,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37 WrapperNode [2019-09-20 12:57:37,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:37,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:57:37,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:57:37,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:57:37,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (1/1) ... [2019-09-20 12:57:37,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (1/1) ... [2019-09-20 12:57:37,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (1/1) ... [2019-09-20 12:57:37,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (1/1) ... [2019-09-20 12:57:37,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (1/1) ... [2019-09-20 12:57:37,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (1/1) ... [2019-09-20 12:57:37,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (1/1) ... [2019-09-20 12:57:37,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:57:37,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:57:37,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:57:37,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:57:37,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:37,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:57:37,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:57:37,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:57:37,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:57:37,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:57:37,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:57:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:57:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:57:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:57:37,514 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:57:37,515 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 12:57:37,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:37 BoogieIcfgContainer [2019-09-20 12:57:37,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:57:37,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:57:37,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:57:37,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:57:37,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:57:36" (1/3) ... [2019-09-20 12:57:37,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2620e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:37, skipping insertion in model container [2019-09-20 12:57:37,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:37" (2/3) ... [2019-09-20 12:57:37,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2620e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:37, skipping insertion in model container [2019-09-20 12:57:37,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:37" (3/3) ... [2019-09-20 12:57:37,524 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2019-09-20 12:57:37,533 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:57:37,540 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:57:37,556 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:57:37,584 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:57:37,585 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:57:37,585 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:57:37,585 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:57:37,586 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:57:37,586 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:57:37,586 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:57:37,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:57:37,586 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:57:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-20 12:57:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:57:37,608 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,609 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,610 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,615 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-20 12:57:37,616 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:37,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,710 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:37,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:57:37,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:57:37,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:57:37,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:57:37,726 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-20 12:57:37,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,743 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-20 12:57:37,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:57:37,745 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 12:57:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,751 INFO L225 Difference]: With dead ends: 30 [2019-09-20 12:57:37,751 INFO L226 Difference]: Without dead ends: 13 [2019-09-20 12:57:37,754 INFO L636 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 [2019-09-20 12:57:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-20 12:57:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-20 12:57:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-20 12:57:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-20 12:57:37,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-20 12:57:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,789 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-20 12:57:37,789 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:57:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-20 12:57:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:57:37,790 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,790 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,790 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,791 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-09-20 12:57:37,791 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:37,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,868 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:37,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:57:37,870 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:57:37,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:57:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:37,872 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-09-20 12:57:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,951 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-09-20 12:57:37,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:57:37,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-20 12:57:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,953 INFO L225 Difference]: With dead ends: 24 [2019-09-20 12:57:37,953 INFO L226 Difference]: Without dead ends: 16 [2019-09-20 12:57:37,954 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-20 12:57:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-09-20 12:57:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-20 12:57:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-20 12:57:37,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-09-20 12:57:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,965 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-20 12:57:37,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:57:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-20 12:57:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 12:57:37,966 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,966 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,966 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2019-09-20 12:57:37,967 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:37,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:38,007 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:38,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:38,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:57:38,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:57:38,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-09-20 12:57:38,105 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:57:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:57:38,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:57:38,106 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2019-09-20 12:57:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:38,168 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-09-20 12:57:38,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:57:38,169 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-20 12:57:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:38,170 INFO L225 Difference]: With dead ends: 33 [2019-09-20 12:57:38,170 INFO L226 Difference]: Without dead ends: 25 [2019-09-20 12:57:38,171 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:57:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-20 12:57:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-09-20 12:57:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-20 12:57:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-09-20 12:57:38,178 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 13 [2019-09-20 12:57:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:38,178 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-09-20 12:57:38,178 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:57:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-09-20 12:57:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 12:57:38,179 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:38,180 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:38,180 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2019-09-20 12:57:38,180 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:38,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:38,278 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:38,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:38,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 12:57:38,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:38,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-09-20 12:57:38,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 12:57:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 12:57:38,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:57:38,371 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2019-09-20 12:57:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:38,474 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-09-20 12:57:38,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 12:57:38,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-09-20 12:57:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:38,478 INFO L225 Difference]: With dead ends: 39 [2019-09-20 12:57:38,478 INFO L226 Difference]: Without dead ends: 34 [2019-09-20 12:57:38,480 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:57:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-20 12:57:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-20 12:57:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-20 12:57:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-09-20 12:57:38,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2019-09-20 12:57:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:38,496 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-09-20 12:57:38,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 12:57:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-09-20 12:57:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-20 12:57:38,498 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:38,498 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:38,500 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:38,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 2 times [2019-09-20 12:57:38,501 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:38,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:38,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:38,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:38,651 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:38,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:57:38,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:57:38,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:38,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 12:57:38,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:38,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:38,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-09-20 12:57:38,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 12:57:38,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 12:57:38,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:38,726 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2019-09-20 12:57:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:38,802 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2019-09-20 12:57:38,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 12:57:38,803 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-09-20 12:57:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:38,804 INFO L225 Difference]: With dead ends: 40 [2019-09-20 12:57:38,804 INFO L226 Difference]: Without dead ends: 35 [2019-09-20 12:57:38,805 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-20 12:57:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-20 12:57:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-20 12:57:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-09-20 12:57:38,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2019-09-20 12:57:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:38,811 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-09-20 12:57:38,811 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 12:57:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-09-20 12:57:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 12:57:38,812 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:38,812 INFO L407 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:38,813 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:38,813 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 3 times [2019-09-20 12:57:38,813 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:38,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:38,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:38,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 12:57:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 12:57:38,870 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-20 12:57:38,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 12:57:38 BoogieIcfgContainer [2019-09-20 12:57:38,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 12:57:38,895 INFO L168 Benchmark]: Toolchain (without parser) took 1967.95 ms. Allocated memory was 138.9 MB in the beginning and 221.2 MB in the end (delta: 82.3 MB). Free memory was 86.4 MB in the beginning and 184.3 MB in the end (delta: -97.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 12:57:38,896 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 104.9 MB in the beginning and 104.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 12:57:38,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.07 ms. Allocated memory is still 138.9 MB. Free memory was 86.0 MB in the beginning and 76.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:38,898 INFO L168 Benchmark]: Boogie Preprocessor took 115.31 ms. Allocated memory was 138.9 MB in the beginning and 198.2 MB in the end (delta: 59.2 MB). Free memory was 76.9 MB in the beginning and 175.6 MB in the end (delta: -98.7 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:38,899 INFO L168 Benchmark]: RCFGBuilder took 206.13 ms. Allocated memory is still 198.2 MB. Free memory was 175.6 MB in the beginning and 164.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:38,900 INFO L168 Benchmark]: TraceAbstraction took 1375.76 ms. Allocated memory was 198.2 MB in the beginning and 221.2 MB in the end (delta: 23.1 MB). Free memory was 164.3 MB in the beginning and 184.3 MB in the end (delta: -20.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:38,903 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 104.9 MB in the beginning and 104.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.07 ms. Allocated memory is still 138.9 MB. Free memory was 86.0 MB in the beginning and 76.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.31 ms. Allocated memory was 138.9 MB in the beginning and 198.2 MB in the end (delta: 59.2 MB). Free memory was 76.9 MB in the beginning and 175.6 MB in the end (delta: -98.7 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 206.13 ms. Allocated memory is still 198.2 MB. Free memory was 175.6 MB in the beginning and 164.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1375.76 ms. Allocated memory was 198.2 MB in the beginning and 221.2 MB in the end (delta: 23.1 MB). Free memory was 164.3 MB in the beginning and 184.3 MB in the end (delta: -20.0 MB). Peak memory consumption was 3.1 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, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 1.3s OverallTime, 6 OverallIterations, 8 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 61 SDtfs, 53 SDslu, 80 SDs, 0 SdLazy, 90 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=5, 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, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 6942 SizeOfPredicates, 2 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 8/186 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...