./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/NetBSD_loop.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/NetBSD_loop.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff8bf597c44bf4fad2da445c30313c8319221d6a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:34:50,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:34:50,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:34:50,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:34:50,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:34:50,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:34:50,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:34:50,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:34:50,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:34:50,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:34:50,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:34:50,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:34:50,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:34:50,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:34:50,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:34:50,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:34:50,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:34:50,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:34:50,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:34:50,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:34:50,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:34:50,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:34:50,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:34:50,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:34:50,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:34:50,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:34:50,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:34:50,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:34:50,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:34:50,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:34:50,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:34:50,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:34:50,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:34:50,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:34:50,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:34:50,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:34:50,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:34:50,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:34:50,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:34:50,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:34:50,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:34:50,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:34:50,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:34:50,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:34:50,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:34:50,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:34:50,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:34:50,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:34:50,508 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:34:50,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:34:50,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:34:50,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:34:50,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:34:50,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:34:50,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:34:50,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:34:50,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:34:50,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:34:50,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:34:50,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:34:50,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:34:50,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:34:50,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:34:50,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:34:50,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:34:50,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:34:50,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:34:50,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:34:50,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:34:50,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:34:50,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:34:50,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:34:50,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8bf597c44bf4fad2da445c30313c8319221d6a [2021-08-26 03:34:50,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:34:50,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:34:50,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:34:50,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:34:50,811 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:34:50,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2021-08-26 03:34:50,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b692406/04dd475031f84eafad3d40e4ed168c0c/FLAG8ccb3bb8c [2021-08-26 03:34:51,333 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:34:51,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2021-08-26 03:34:51,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b692406/04dd475031f84eafad3d40e4ed168c0c/FLAG8ccb3bb8c [2021-08-26 03:34:51,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b692406/04dd475031f84eafad3d40e4ed168c0c [2021-08-26 03:34:51,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:34:51,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:34:51,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:34:51,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:34:51,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:34:51,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51, skipping insertion in model container [2021-08-26 03:34:51,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:34:51,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:34:51,520 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2021-08-26 03:34:51,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:34:51,539 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:34:51,577 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2021-08-26 03:34:51,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:34:51,599 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:34:51,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51 WrapperNode [2021-08-26 03:34:51,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:34:51,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:34:51,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:34:51,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:34:51,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:34:51,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:34:51,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:34:51,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:34:51,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:34:51,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:34:51,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:34:51,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:34:51,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (1/1) ... [2021-08-26 03:34:51,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:34:51,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:34:51,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 03:34:51,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 03:34:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:34:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:34:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:34:51,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:34:51,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:34:51,952 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 03:34:51,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:34:51 BoogieIcfgContainer [2021-08-26 03:34:51,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:34:51,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:34:51,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:34:51,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:34:51,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:34:51" (1/3) ... [2021-08-26 03:34:51,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bd4d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:34:51, skipping insertion in model container [2021-08-26 03:34:51,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:51" (2/3) ... [2021-08-26 03:34:51,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bd4d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:34:51, skipping insertion in model container [2021-08-26 03:34:51,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:34:51" (3/3) ... [2021-08-26 03:34:51,959 INFO L111 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2021-08-26 03:34:51,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:34:51,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 03:34:52,005 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:34:52,010 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 03:34:52,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 03:34:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 03:34:52,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:34:52,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:34:52,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:34:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:34:52,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1804971340, now seen corresponding path program 1 times [2021-08-26 03:34:52,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:34:52,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239137413] [2021-08-26 03:34:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:52,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:34:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:52,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:34:52,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239137413] [2021-08-26 03:34:52,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239137413] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:34:52,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:34:52,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 03:34:52,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022239414] [2021-08-26 03:34:52,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:34:52,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:34:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:34:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:34:52,313 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:34:52,386 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-08-26 03:34:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:34:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-26 03:34:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:34:52,393 INFO L225 Difference]: With dead ends: 37 [2021-08-26 03:34:52,393 INFO L226 Difference]: Without dead ends: 12 [2021-08-26 03:34:52,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:34:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-26 03:34:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-08-26 03:34:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-08-26 03:34:52,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-08-26 03:34:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:34:52,423 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-08-26 03:34:52,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-08-26 03:34:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 03:34:52,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:34:52,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:34:52,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:34:52,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:34:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:34:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash -589174129, now seen corresponding path program 1 times [2021-08-26 03:34:52,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:34:52,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112620161] [2021-08-26 03:34:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:52,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:34:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:52,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:34:52,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112620161] [2021-08-26 03:34:52,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112620161] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:34:52,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:34:52,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 03:34:52,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422809237] [2021-08-26 03:34:52,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:34:52,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:34:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:34:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:34:52,547 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:34:52,637 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-08-26 03:34:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:34:52,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-26 03:34:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:34:52,654 INFO L225 Difference]: With dead ends: 18 [2021-08-26 03:34:52,654 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 03:34:52,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:34:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 03:34:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-08-26 03:34:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-08-26 03:34:52,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2021-08-26 03:34:52,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:34:52,665 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-08-26 03:34:52,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-08-26 03:34:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 03:34:52,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:34:52,667 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:34:52,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:34:52,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:34:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:34:52,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1597097285, now seen corresponding path program 1 times [2021-08-26 03:34:52,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:34:52,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024145339] [2021-08-26 03:34:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:52,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:34:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:52,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:34:52,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024145339] [2021-08-26 03:34:52,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024145339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:34:52,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805943999] [2021-08-26 03:34:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:52,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:34:52,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:34:52,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:34:52,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:34:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:52,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:34:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:34:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:53,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805943999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:34:53,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:34:53,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-26 03:34:53,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234638106] [2021-08-26 03:34:53,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 03:34:53,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:34:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 03:34:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:34:53,155 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:34:53,247 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-08-26 03:34:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 03:34:53,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 03:34:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:34:53,249 INFO L225 Difference]: With dead ends: 24 [2021-08-26 03:34:53,249 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 03:34:53,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:34:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 03:34:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-08-26 03:34:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-08-26 03:34:53,254 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 14 [2021-08-26 03:34:53,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:34:53,255 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-08-26 03:34:53,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-08-26 03:34:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 03:34:53,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:34:53,256 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:34:53,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:34:53,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:34:53,477 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:34:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:34:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash 759966799, now seen corresponding path program 2 times [2021-08-26 03:34:53,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:34:53,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235280801] [2021-08-26 03:34:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:53,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:34:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 03:34:53,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:34:53,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235280801] [2021-08-26 03:34:53,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235280801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:34:53,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917043102] [2021-08-26 03:34:53,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:34:53,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:34:53,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:34:53,580 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:34:53,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:34:53,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 03:34:53,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:34:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:34:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:34:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 03:34:53,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917043102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:34:53,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:34:53,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 03:34:53,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597404800] [2021-08-26 03:34:53,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:34:53,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:34:53,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:34:53,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:34:53,727 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:34:53,802 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-08-26 03:34:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:34:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 03:34:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:34:53,804 INFO L225 Difference]: With dead ends: 20 [2021-08-26 03:34:53,804 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:34:53,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:34:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:34:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:34:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:34:53,805 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-08-26 03:34:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:34:53,805 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:34:53,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:34:53,806 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:34:53,807 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:34:53,808 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:34:53,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:34:54,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-26 03:34:54,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:34:54,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:54,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:54,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:54,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:54,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:54,096 INFO L857 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-08-26 03:34:54,096 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:34:54,096 INFO L857 garLoopResultBuilder]: For program point L33-1(line 33) no Hoare annotation was computed. [2021-08-26 03:34:54,096 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-26 03:34:54,096 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-26 03:34:54,097 INFO L857 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-08-26 03:34:54,097 INFO L860 garLoopResultBuilder]: At program point L44(lines 25 45) the Hoare annotation is: true [2021-08-26 03:34:54,097 INFO L860 garLoopResultBuilder]: At program point L44-1(lines 24 45) the Hoare annotation is: true [2021-08-26 03:34:54,097 INFO L853 garLoopResultBuilder]: At program point L38-2(lines 38 43) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~MAXPATHLEN~0)) (.cse1 (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0))) (or (and (= ULTIMATE.start_main_~glob2_p_off~0 0) .cse0 .cse1) (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 .cse1 (<= 0 ULTIMATE.start_main_~glob2_p_off~0)))) [2021-08-26 03:34:54,097 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:34:54,097 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:34:54,097 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:34:54,098 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-26 03:34:54,098 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-26 03:34:54,098 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (<= ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= 1 ULTIMATE.start_main_~MAXPATHLEN~0) (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) [2021-08-26 03:34:54,098 INFO L857 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-08-26 03:34:54,098 INFO L853 garLoopResultBuilder]: At program point L18-5(lines 1 45) the Hoare annotation is: (and (<= ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~MAXPATHLEN~0) (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= 0 ULTIMATE.start_main_~glob2_p_off~0)) [2021-08-26 03:34:54,101 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:34:54,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:34:54 BoogieIcfgContainer [2021-08-26 03:34:54,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:34:54,113 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:34:54,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:34:54,113 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:34:54,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:34:51" (3/4) ... [2021-08-26 03:34:54,116 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:34:54,123 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-26 03:34:54,123 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:34:54,123 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:34:54,123 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:34:54,150 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:34:54,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:34:54,151 INFO L168 Benchmark]: Toolchain (without parser) took 2787.83 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 35.0 MB in the beginning and 36.0 MB in the end (delta: -1.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:54,151 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 56.6 MB. Free memory was 38.2 MB in the beginning and 38.1 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:34:54,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.16 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 39.1 MB in the end (delta: -4.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:54,152 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.45 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 37.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:34:54,152 INFO L168 Benchmark]: Boogie Preprocessor took 24.33 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 36.6 MB in the end (delta: 999.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:34:54,153 INFO L168 Benchmark]: RCFGBuilder took 296.12 ms. Allocated memory is still 56.6 MB. Free memory was 36.6 MB in the beginning and 24.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:54,153 INFO L168 Benchmark]: TraceAbstraction took 2157.96 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 24.4 MB in the beginning and 38.8 MB in the end (delta: -14.4 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:54,153 INFO L168 Benchmark]: Witness Printer took 37.04 ms. Allocated memory is still 83.9 MB. Free memory was 38.8 MB in the beginning and 36.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:54,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 56.6 MB. Free memory was 38.2 MB in the beginning and 38.1 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.16 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 39.1 MB in the end (delta: -4.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.45 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 37.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.33 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 36.6 MB in the end (delta: 999.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 296.12 ms. Allocated memory is still 56.6 MB. Free memory was 36.6 MB in the beginning and 24.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2157.96 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 24.4 MB in the beginning and 38.8 MB in the end (delta: -14.4 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * Witness Printer took 37.04 ms. Allocated memory is still 83.9 MB. Free memory was 38.8 MB in the beginning and 36.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2097.8ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 8.6ms, AutomataDifference: 383.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 86.5ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 46 SDslu, 55 SDs, 0 SdLazy, 73 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 112.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 270.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 19 NumberOfFragments, 59 HoareAnnotationTreeSize, 5 FomulaSimplifications, 231 FormulaSimplificationTreeSizeReduction, 24.2ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 56.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 34.9ms SsaConstructionTime, 126.0ms SatisfiabilityAnalysisTime, 728.7ms InterpolantComputationTime, 82 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 248 SizeOfPredicates, 11 NumberOfNonLiveVariables, 121 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 14/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((glob2_p_off <= MAXPATHLEN && 1 <= MAXPATHLEN) && glob2_pathlim_off <= MAXPATHLEN) && 0 <= glob2_p_off) && !(0 == cond) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: (((glob2_p_off <= MAXPATHLEN && 1 <= cond) && 1 <= MAXPATHLEN) && glob2_pathlim_off <= MAXPATHLEN) && 0 <= glob2_p_off - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((glob2_p_off == 0 && 1 <= MAXPATHLEN) && glob2_pathlim_off <= MAXPATHLEN) || (((1 <= cond && 1 <= MAXPATHLEN) && glob2_pathlim_off <= MAXPATHLEN) && 0 <= glob2_p_off) RESULT: Ultimate proved your program to be correct! [2021-08-26 03:34:54,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...