./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa 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/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c -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 128b2219e8f86913777da69c49be5957c6dd8c80 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 10:07:19,121 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:07:19,123 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:07:19,141 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:07:19,143 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:07:19,146 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:07:19,148 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:07:19,152 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:07:19,155 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:07:19,157 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:07:19,160 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:07:19,160 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:07:19,162 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:07:19,164 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:07:19,173 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:07:19,174 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:07:19,174 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:07:19,176 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:07:19,182 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:07:19,184 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:07:19,187 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:07:19,189 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:07:19,193 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:07:19,194 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:07:19,194 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:07:19,195 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:07:19,196 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:07:19,197 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:07:19,198 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:07:19,199 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:07:19,199 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:07:19,200 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:07:19,200 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:07:19,200 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:07:19,201 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:07:19,203 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:07:19,203 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:07:19,218 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:07:19,218 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:07:19,219 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:07:19,219 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:07:19,219 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:07:19,220 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:07:19,220 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:07:19,221 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:07:19,221 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:07:19,221 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:07:19,221 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:07:19,221 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:07:19,221 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:07:19,222 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:07:19,222 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:07:19,222 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:07:19,222 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:07:19,222 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:07:19,222 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:07:19,223 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:07:19,224 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:07:19,224 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:07:19,225 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:07:19,225 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:07:19,225 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:07:19,225 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:07:19,225 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:07:19,225 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:07:19,226 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 -> 128b2219e8f86913777da69c49be5957c6dd8c80 [2018-12-31 10:07:19,265 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:07:19,282 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:07:19,285 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:07:19,287 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:07:19,288 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:07:19,290 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-12-31 10:07:19,354 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcbfd94c/5ede60829c1b4cc8b648abe7f3d8a33f/FLAGfea4dfa23 [2018-12-31 10:07:19,808 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:07:19,809 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-12-31 10:07:19,814 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcbfd94c/5ede60829c1b4cc8b648abe7f3d8a33f/FLAGfea4dfa23 [2018-12-31 10:07:20,180 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcbfd94c/5ede60829c1b4cc8b648abe7f3d8a33f [2018-12-31 10:07:20,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:07:20,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:07:20,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:20,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:07:20,192 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:07:20,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5da8318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20, skipping insertion in model container [2018-12-31 10:07:20,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:07:20,222 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:07:20,436 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:20,446 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:07:20,471 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:20,490 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:07:20,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20 WrapperNode [2018-12-31 10:07:20,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:20,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:20,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:07:20,493 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:07:20,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:20,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:07:20,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:07:20,543 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:07:20,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (1/1) ... [2018-12-31 10:07:20,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:07:20,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:07:20,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:07:20,568 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:07:20,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (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 [2018-12-31 10:07:20,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:07:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:07:20,717 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-31 10:07:20,717 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-31 10:07:20,945 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:07:20,945 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:07:20,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:20 BoogieIcfgContainer [2018-12-31 10:07:20,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:07:20,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:07:20,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:07:20,950 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:07:20,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:07:20" (1/3) ... [2018-12-31 10:07:20,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183c5de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:20, skipping insertion in model container [2018-12-31 10:07:20,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:20" (2/3) ... [2018-12-31 10:07:20,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183c5de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:20, skipping insertion in model container [2018-12-31 10:07:20,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:20" (3/3) ... [2018-12-31 10:07:20,954 INFO L112 eAbstractionObserver]: Analyzing ICFG id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-12-31 10:07:20,965 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:07:20,972 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:07:20,987 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:07:21,020 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:07:21,021 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:07:21,022 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:07:21,022 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:07:21,022 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:07:21,022 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:07:21,022 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:07:21,022 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:07:21,022 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:07:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-12-31 10:07:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:07:21,049 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:21,050 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:21,052 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:21,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1224902363, now seen corresponding path program 1 times [2018-12-31 10:07:21,061 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:21,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:21,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 10:07:21,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:21,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:07:21,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:07:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:07:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:21,566 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2018-12-31 10:07:21,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:21,631 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-12-31 10:07:21,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:07:21,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:07:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:21,644 INFO L225 Difference]: With dead ends: 28 [2018-12-31 10:07:21,645 INFO L226 Difference]: Without dead ends: 15 [2018-12-31 10:07:21,649 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-31 10:07:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-31 10:07:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-31 10:07:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-12-31 10:07:21,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2018-12-31 10:07:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:21,695 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-12-31 10:07:21,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:07:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-12-31 10:07:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-31 10:07:21,698 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:21,698 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:21,699 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash 510739163, now seen corresponding path program 1 times [2018-12-31 10:07:21,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:21,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:21,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:21,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:21,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:21,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:21,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:07:21,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:07:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:07:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:21,888 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2018-12-31 10:07:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:21,971 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-12-31 10:07:21,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:07:21,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-31 10:07:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:21,973 INFO L225 Difference]: With dead ends: 27 [2018-12-31 10:07:21,973 INFO L226 Difference]: Without dead ends: 19 [2018-12-31 10:07:21,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-31 10:07:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-12-31 10:07:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:07:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-12-31 10:07:21,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2018-12-31 10:07:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:21,983 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-12-31 10:07:21,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:07:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-12-31 10:07:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-31 10:07:21,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:21,985 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:21,985 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:21,985 INFO L82 PathProgramCache]: Analyzing trace with hash 539368314, now seen corresponding path program 1 times [2018-12-31 10:07:21,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:21,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:21,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:21,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:21,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:22,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:22,414 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 [2018-12-31 10:07:22,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:22,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:22,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:22,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-31 10:07:22,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 10:07:22,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 10:07:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-31 10:07:22,595 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2018-12-31 10:07:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:22,761 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-12-31 10:07:22,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:07:22,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-12-31 10:07:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:22,765 INFO L225 Difference]: With dead ends: 23 [2018-12-31 10:07:22,765 INFO L226 Difference]: Without dead ends: 19 [2018-12-31 10:07:22,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:07:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-31 10:07:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-31 10:07:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-31 10:07:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-12-31 10:07:22,771 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2018-12-31 10:07:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:22,772 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-31 10:07:22,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 10:07:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-12-31 10:07:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 10:07:22,773 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:22,773 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:22,774 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:22,774 INFO L82 PathProgramCache]: Analyzing trace with hash -747825770, now seen corresponding path program 1 times [2018-12-31 10:07:22,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:22,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:22,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:22,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:22,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-31 10:07:22,961 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:22,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:07:22,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:07:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:07:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:22,963 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2018-12-31 10:07:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:22,992 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-12-31 10:07:22,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:07:22,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-31 10:07:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:22,994 INFO L225 Difference]: With dead ends: 25 [2018-12-31 10:07:22,995 INFO L226 Difference]: Without dead ends: 21 [2018-12-31 10:07:22,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-31 10:07:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2018-12-31 10:07:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-31 10:07:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-12-31 10:07:23,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 23 [2018-12-31 10:07:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:23,005 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-31 10:07:23,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:07:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-12-31 10:07:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 10:07:23,006 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:23,006 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:23,006 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:23,008 INFO L82 PathProgramCache]: Analyzing trace with hash -719196619, now seen corresponding path program 2 times [2018-12-31 10:07:23,008 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:23,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:23,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:23,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:23,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 10:07:23,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:23,851 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 [2018-12-31 10:07:23,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:23,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:23,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:23,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 10:07:23,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:23,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-31 10:07:23,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:07:23,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:07:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:07:23,996 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2018-12-31 10:07:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:24,142 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2018-12-31 10:07:24,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 10:07:24,143 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-12-31 10:07:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:24,145 INFO L225 Difference]: With dead ends: 37 [2018-12-31 10:07:24,145 INFO L226 Difference]: Without dead ends: 25 [2018-12-31 10:07:24,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:24,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-31 10:07:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-12-31 10:07:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 10:07:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-12-31 10:07:24,152 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 23 [2018-12-31 10:07:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:24,152 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-12-31 10:07:24,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:07:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-12-31 10:07:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-31 10:07:24,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:24,154 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:24,154 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash -895116854, now seen corresponding path program 3 times [2018-12-31 10:07:24,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:24,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:24,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:24,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:24,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 10:07:24,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:24,589 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 [2018-12-31 10:07:24,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:24,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-31 10:07:24,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:24,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-31 10:07:24,728 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-31 10:07:24,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2018-12-31 10:07:24,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:07:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:07:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:24,730 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 14 states. [2018-12-31 10:07:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:24,910 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-12-31 10:07:24,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 10:07:24,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2018-12-31 10:07:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:24,914 INFO L225 Difference]: With dead ends: 29 [2018-12-31 10:07:24,914 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 10:07:24,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2018-12-31 10:07:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 10:07:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 10:07:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 10:07:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 10:07:24,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2018-12-31 10:07:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:24,917 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 10:07:24,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:07:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 10:07:24,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 10:07:24,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 10:07:24,940 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 10:07:24,940 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 10:07:24,940 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 10:07:24,940 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2018-12-31 10:07:24,940 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-12-31 10:07:24,941 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-12-31 10:07:24,941 INFO L451 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2018-12-31 10:07:24,941 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-31 10:07:24,941 INFO L448 ceAbstractionStarter]: For program point L11(lines 11 17) no Hoare annotation was computed. [2018-12-31 10:07:24,941 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2018-12-31 10:07:24,941 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2018-12-31 10:07:24,941 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2018-12-31 10:07:24,942 INFO L448 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2018-12-31 10:07:24,942 INFO L451 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2018-12-31 10:07:24,942 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-31 10:07:24,942 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-12-31 10:07:24,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:07:24 BoogieIcfgContainer [2018-12-31 10:07:24,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:07:24,946 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:07:24,946 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:07:24,946 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:07:24,946 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:20" (3/4) ... [2018-12-31 10:07:24,950 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 10:07:24,957 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-31 10:07:24,961 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-31 10:07:24,962 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 10:07:25,003 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:07:25,003 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:07:25,004 INFO L168 Benchmark]: Toolchain (without parser) took 4819.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 951.3 MB in the beginning and 920.8 MB in the end (delta: 30.6 MB). Peak memory consumption was 146.5 MB. Max. memory is 11.5 GB. [2018-12-31 10:07:25,006 INFO L168 Benchmark]: CDTParser took 0.44 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. [2018-12-31 10:07:25,007 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.28 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. [2018-12-31 10:07:25,007 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.90 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. [2018-12-31 10:07:25,008 INFO L168 Benchmark]: Boogie Preprocessor took 24.16 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. [2018-12-31 10:07:25,008 INFO L168 Benchmark]: RCFGBuilder took 378.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -159.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-12-31 10:07:25,009 INFO L168 Benchmark]: TraceAbstraction took 3998.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 920.8 MB in the end (delta: 172.6 MB). Peak memory consumption was 172.6 MB. Max. memory is 11.5 GB. [2018-12-31 10:07:25,010 INFO L168 Benchmark]: Witness Printer took 57.72 ms. Allocated memory is still 1.1 GB. Free memory is still 920.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:07:25,013 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 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 304.28 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 49.90 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 24.16 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 378.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -159.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3998.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 920.8 MB in the end (delta: 172.6 MB). Peak memory consumption was 172.6 MB. Max. memory is 11.5 GB. * Witness Printer took 57.72 ms. Allocated memory is still 1.1 GB. Free memory is still 920.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. SAFE Result, 3.9s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 91 SDtfs, 17 SDslu, 458 SDs, 0 SdLazy, 198 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 186 NumberOfCodeBlocks, 172 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 12467 SizeOfPredicates, 7 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 91/123 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...