./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loop-acceleration/underapprox_false-unreach-call2_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/loop-acceleration/underapprox_false-unreach-call2_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0ad4658b31654787cb281a441e891421d607e94 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:18:57,871 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:18:57,873 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:18:57,890 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:18:57,890 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:18:57,900 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:18:57,902 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:18:57,904 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:18:57,907 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:18:57,907 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:18:57,910 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:18:57,911 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:18:57,912 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:18:57,915 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:18:57,923 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:18:57,923 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:18:57,927 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:18:57,929 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:18:57,933 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:18:57,938 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:18:57,939 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:18:57,942 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:18:57,944 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:18:57,947 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:18:57,948 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:18:57,949 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:18:57,950 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:18:57,950 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:18:57,951 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:18:57,955 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:18:57,956 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:18:57,956 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:18:57,957 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:18:57,957 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:18:57,960 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:18:57,960 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:18:57,961 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:18:57,982 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:18:57,983 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:18:57,983 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:18:57,984 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:18:57,984 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:18:57,984 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:18:57,984 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:18:57,985 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:18:57,985 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:18:57,985 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:18:57,985 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:18:57,985 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:18:57,985 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:18:57,986 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:18:57,986 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:18:57,986 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:18:57,986 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:18:57,986 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:18:57,986 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:18:57,987 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:18:57,987 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:18:57,987 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:18:57,987 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:18:57,987 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:18:57,988 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:18:57,988 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:18:57,988 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:18:57,988 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:18:57,988 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:18:57,988 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:18:57,989 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0ad4658b31654787cb281a441e891421d607e94 [2018-11-28 18:18:58,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:18:58,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:18:58,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:18:58,048 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:18:58,049 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:18:58,049 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-11-28 18:18:58,104 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa1d7864/aed6a103bf7b4463907c6114bd2f565d/FLAG1ffe25b46 [2018-11-28 18:18:58,511 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:18:58,514 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-11-28 18:18:58,521 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa1d7864/aed6a103bf7b4463907c6114bd2f565d/FLAG1ffe25b46 [2018-11-28 18:18:58,902 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa1d7864/aed6a103bf7b4463907c6114bd2f565d [2018-11-28 18:18:58,906 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:18:58,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:18:58,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:18:58,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:18:58,915 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:18:58,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:18:58" (1/1) ... [2018-11-28 18:18:58,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ebed1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:58, skipping insertion in model container [2018-11-28 18:18:58,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:18:58" (1/1) ... [2018-11-28 18:18:58,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:18:58,944 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:18:59,122 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:18:59,127 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:18:59,144 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:18:59,159 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:18:59,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59 WrapperNode [2018-11-28 18:18:59,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:18:59,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:18:59,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:18:59,162 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:18:59,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:18:59,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:18:59,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:18:59,185 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:18:59,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... [2018-11-28 18:18:59,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:18:59,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:18:59,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:18:59,211 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:18:59,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:18:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:18:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:18:59,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:18:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:18:59,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:18:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:18:59,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 18:18:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 18:18:59,627 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:18:59,628 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-28 18:18:59,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:18:59 BoogieIcfgContainer [2018-11-28 18:18:59,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:18:59,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:18:59,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:18:59,633 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:18:59,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:18:58" (1/3) ... [2018-11-28 18:18:59,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b50f289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:18:59, skipping insertion in model container [2018-11-28 18:18:59,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:18:59" (2/3) ... [2018-11-28 18:18:59,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b50f289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:18:59, skipping insertion in model container [2018-11-28 18:18:59,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:18:59" (3/3) ... [2018-11-28 18:18:59,636 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_false-unreach-call2_true-termination.i [2018-11-28 18:18:59,645 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:18:59,652 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:18:59,666 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:18:59,696 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:18:59,697 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:18:59,697 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:18:59,697 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:18:59,697 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:18:59,697 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:18:59,698 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:18:59,698 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:18:59,698 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:18:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-11-28 18:18:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 18:18:59,720 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:18:59,721 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:18:59,724 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:18:59,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:18:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2018-11-28 18:18:59,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:18:59,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:18:59,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:18:59,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:18:59,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:18:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:19:00,061 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-11-28 18:19:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:00,088 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:19:00,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 18:19:00,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 18:19:00,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 18:19:00,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 18:19:00,107 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2018-11-28 18:19:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:19:00,138 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2018-11-28 18:19:00,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 18:19:00,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-28 18:19:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:19:00,146 INFO L225 Difference]: With dead ends: 29 [2018-11-28 18:19:00,146 INFO L226 Difference]: Without dead ends: 12 [2018-11-28 18:19:00,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 18:19:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-28 18:19:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-28 18:19:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-28 18:19:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-28 18:19:00,184 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-28 18:19:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:19:00,185 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-28 18:19:00,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 18:19:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-28 18:19:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-28 18:19:00,186 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:19:00,186 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:19:00,187 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:19:00,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:19:00,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2018-11-28 18:19:00,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:19:00,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:19:00,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:00,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:19:00,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:19:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:00,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:19:00,354 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:19:00,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:19:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:19:00,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:19:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:00,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:19:00,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-28 18:19:00,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:19:00,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:19:00,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:19:00,483 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-11-28 18:19:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:19:00,507 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-28 18:19:00,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 18:19:00,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-28 18:19:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:19:00,510 INFO L225 Difference]: With dead ends: 18 [2018-11-28 18:19:00,510 INFO L226 Difference]: Without dead ends: 13 [2018-11-28 18:19:00,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:19:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-28 18:19:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-28 18:19:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-28 18:19:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-11-28 18:19:00,516 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-11-28 18:19:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:19:00,517 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-11-28 18:19:00,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:19:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-11-28 18:19:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-28 18:19:00,518 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:19:00,518 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:19:00,519 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:19:00,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:19:00,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2018-11-28 18:19:00,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:19:00,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:19:00,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:00,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:19:00,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:19:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:00,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:19:00,771 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:19:00,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:19:00,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:19:00,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:19:00,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:19:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:00,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:19:00,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-28 18:19:00,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:19:00,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:19:00,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:19:00,992 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2018-11-28 18:19:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:19:01,057 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-28 18:19:01,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:19:01,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-11-28 18:19:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:19:01,058 INFO L225 Difference]: With dead ends: 19 [2018-11-28 18:19:01,058 INFO L226 Difference]: Without dead ends: 14 [2018-11-28 18:19:01,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:19:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-28 18:19:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-28 18:19:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-28 18:19:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-28 18:19:01,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-11-28 18:19:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:19:01,063 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-28 18:19:01,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:19:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-28 18:19:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:19:01,064 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:19:01,064 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:19:01,065 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:19:01,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:19:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2018-11-28 18:19:01,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:19:01,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:19:01,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:01,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:19:01,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:19:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:01,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:19:01,275 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:19:01,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:19:01,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 18:19:01,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:19:01,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:19:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:01,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:19:01,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-28 18:19:01,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 18:19:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 18:19:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:19:01,370 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-11-28 18:19:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:19:01,512 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-28 18:19:01,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:19:01,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-11-28 18:19:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:19:01,514 INFO L225 Difference]: With dead ends: 20 [2018-11-28 18:19:01,515 INFO L226 Difference]: Without dead ends: 15 [2018-11-28 18:19:01,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:19:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-28 18:19:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-28 18:19:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-28 18:19:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-28 18:19:01,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-11-28 18:19:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:19:01,520 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-28 18:19:01,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 18:19:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-28 18:19:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:19:01,521 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:19:01,521 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:19:01,521 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:19:01,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:19:01,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2018-11-28 18:19:01,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:19:01,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:19:01,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:01,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:19:01,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:19:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:01,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:19:01,747 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:19:01,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:19:01,771 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:19:01,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:19:01,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:19:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:01,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:19:01,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 18:19:01,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:19:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:19:01,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:19:01,842 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-11-28 18:19:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:19:02,010 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-28 18:19:02,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:19:02,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-11-28 18:19:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:19:02,013 INFO L225 Difference]: With dead ends: 21 [2018-11-28 18:19:02,013 INFO L226 Difference]: Without dead ends: 16 [2018-11-28 18:19:02,015 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:19:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-28 18:19:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-28 18:19:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 18:19:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-28 18:19:02,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-11-28 18:19:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:19:02,026 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-28 18:19:02,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:19:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-28 18:19:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-28 18:19:02,030 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:19:02,030 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:19:02,031 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:19:02,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:19:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2018-11-28 18:19:02,031 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:19:02,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:19:02,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:02,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:19:02,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:19:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:02,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:19:02,423 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:19:02,433 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:19:02,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-28 18:19:02,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:19:02,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:19:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:19:02,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:19:02,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 18:19:02,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:19:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:19:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:19:02,506 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2018-11-28 18:19:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:19:02,564 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-28 18:19:02,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:19:02,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-11-28 18:19:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:19:02,571 INFO L225 Difference]: With dead ends: 22 [2018-11-28 18:19:02,571 INFO L226 Difference]: Without dead ends: 17 [2018-11-28 18:19:02,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:19:02,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-28 18:19:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-28 18:19:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-28 18:19:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-28 18:19:02,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-11-28 18:19:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:19:02,578 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-28 18:19:02,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:19:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-28 18:19:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 18:19:02,579 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:19:02,579 INFO L402 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:19:02,579 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:19:02,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:19:02,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2018-11-28 18:19:02,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:19:02,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:19:02,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:02,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:19:02,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:19:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:19:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:19:02,656 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 18:19:02,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:19:02 BoogieIcfgContainer [2018-11-28 18:19:02,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:19:02,678 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:19:02,678 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:19:02,679 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:19:02,679 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:18:59" (3/4) ... [2018-11-28 18:19:02,681 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 18:19:02,730 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:19:02,730 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:19:02,731 INFO L168 Benchmark]: Toolchain (without parser) took 3824.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 951.3 MB in the beginning and 989.1 MB in the end (delta: -37.7 MB). Peak memory consumption was 106.4 MB. Max. memory is 11.5 GB. [2018-11-28 18:19:02,732 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:19:02,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.36 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:19:02,733 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.24 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:19:02,733 INFO L168 Benchmark]: Boogie Preprocessor took 24.45 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:19:02,734 INFO L168 Benchmark]: RCFGBuilder took 418.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -187.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-11-28 18:19:02,735 INFO L168 Benchmark]: TraceAbstraction took 3048.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 989.1 MB in the end (delta: 139.4 MB). Peak memory consumption was 139.4 MB. Max. memory is 11.5 GB. [2018-11-28 18:19:02,735 INFO L168 Benchmark]: Witness Printer took 51.60 ms. Allocated memory is still 1.2 GB. Free memory is still 989.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:19:02,739 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 249.36 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.24 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.45 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 418.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -187.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3048.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 989.1 MB in the end (delta: 139.4 MB). Peak memory consumption was 139.4 MB. Max. memory is 11.5 GB. * Witness Printer took 51.60 ms. Allocated memory is still 1.2 GB. Free memory is still 989.1 MB. There was no memory consumed. Max. memory is 11.5 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: [L9] unsigned int x = 0; [L10] unsigned int y = 1; VAL [x=0, y=1] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=1, y=2] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=2, y=4] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=3, y=8] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=4, y=16] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=5, y=32] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=6, y=64] [L11] COND FALSE !(x < 6) VAL [x=6, y=64] [L15] CALL __VERIFIER_assert(x != 6) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. UNSAFE Result, 2.9s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 150 SDs, 0 SdLazy, 127 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 4835 SizeOfPredicates, 0 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...