./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI --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 Taipan --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 0.2.0-7b2dab5 [2021-10-11 02:28:31,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:28:31,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:28:31,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:28:31,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:28:31,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:28:31,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:28:31,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:28:31,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:28:31,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:28:31,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:28:31,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:28:31,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:28:31,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:28:31,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:28:31,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:28:31,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:28:31,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:28:31,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:28:31,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:28:31,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:28:31,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:28:31,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:28:31,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:28:31,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:28:31,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:28:31,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:28:31,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:28:31,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:28:31,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:28:31,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:28:31,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:28:31,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:28:31,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:28:31,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:28:31,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:28:31,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:28:31,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:28:31,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:28:31,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:28:31,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:28:31,481 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:28:31,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:28:31,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:28:31,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:28:31,506 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:28:31,507 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:28:31,507 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:28:31,507 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:28:31,508 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:28:31,508 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:28:31,508 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:28:31,509 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:28:31,509 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:28:31,509 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:28:31,510 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:28:31,510 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:28:31,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:28:31,511 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:28:31,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:28:31,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:28:31,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:28:31,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:28:31,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:28:31,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:28:31,513 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:28:31,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:28:31,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:28:31,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:28:31,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:28:31,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:28:31,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:28:31,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:31,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:28:31,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:28:31,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:28:31,516 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:28:31,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:28:31,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:28:31,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:28:31,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:28:31,517 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8bf597c44bf4fad2da445c30313c8319221d6a [2021-10-11 02:28:31,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:28:31,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:28:31,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:28:31,819 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:28:31,820 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:28:31,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2021-10-11 02:28:31,898 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/data/a6a39ffef/4d05c60a43f342fd9a9878fa4edee2fe/FLAGaea2f22ea [2021-10-11 02:28:32,383 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:28:32,384 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2021-10-11 02:28:32,391 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/data/a6a39ffef/4d05c60a43f342fd9a9878fa4edee2fe/FLAGaea2f22ea [2021-10-11 02:28:32,749 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/data/a6a39ffef/4d05c60a43f342fd9a9878fa4edee2fe [2021-10-11 02:28:32,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:28:32,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:28:32,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:32,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:28:32,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:28:32,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22767535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32, skipping insertion in model container [2021-10-11 02:28:32,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:28:32,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:28:32,965 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2021-10-11 02:28:32,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:32,984 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:28:32,994 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2021-10-11 02:28:32,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:33,013 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:28:33,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33 WrapperNode [2021-10-11 02:28:33,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:33,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:33,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:28:33,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:28:33,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:33,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:28:33,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:28:33,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:28:33,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:28:33,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:28:33,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:28:33,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:28:33,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:28:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:28:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:28:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:28:33,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:28:33,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:28:33,483 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-11 02:28:33,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:33 BoogieIcfgContainer [2021-10-11 02:28:33,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:28:33,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:28:33,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:28:33,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:28:33,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:32" (1/3) ... [2021-10-11 02:28:33,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391e9019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:33, skipping insertion in model container [2021-10-11 02:28:33,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (2/3) ... [2021-10-11 02:28:33,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391e9019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:33, skipping insertion in model container [2021-10-11 02:28:33,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:33" (3/3) ... [2021-10-11 02:28:33,495 INFO L111 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2021-10-11 02:28:33,509 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:28:33,513 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 02:28:33,525 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 02:28:33,550 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:28:33,550 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:28:33,550 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:28:33,550 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:28:33,551 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:28:33,551 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:28:33,551 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:28:33,551 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:28:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 02:28:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:28:33,569 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:33,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:28:33,571 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash 74434897, now seen corresponding path program 1 times [2021-10-11 02:28:33,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:33,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368020990] [2021-10-11 02:28:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:33,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368020990] [2021-10-11 02:28:33,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:33,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:28:33,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032117608] [2021-10-11 02:28:33,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:33,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:33,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:33,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:33,811 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2021-10-11 02:28:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:33,866 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-10-11 02:28:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:33,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-10-11 02:28:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:33,876 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:28:33,876 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:28:33,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:28:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-10-11 02:28:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:28:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-11 02:28:33,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-10-11 02:28:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:33,911 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-11 02:28:33,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-11 02:28:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:28:33,922 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:33,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:33,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:28:33,923 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1482352300, now seen corresponding path program 1 times [2021-10-11 02:28:33,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:33,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445189606] [2021-10-11 02:28:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:34,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445189606] [2021-10-11 02:28:34,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:34,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:28:34,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662991145] [2021-10-11 02:28:34,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:34,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:34,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:34,051 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2021-10-11 02:28:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:34,114 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-11 02:28:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:28:34,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:28:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:34,116 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:28:34,117 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:28:34,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:28:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-11 02:28:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:28:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-11 02:28:34,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2021-10-11 02:28:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:34,128 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-11 02:28:34,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-11 02:28:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:28:34,129 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:34,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:34,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:28:34,131 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1520039520, now seen corresponding path program 1 times [2021-10-11 02:28:34,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:34,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185972938] [2021-10-11 02:28:34,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:34,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185972938] [2021-10-11 02:28:34,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055278135] [2021-10-11 02:28:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:34,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:28:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:34,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:34,426 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:34,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:34,461 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:34,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878626749] [2021-10-11 02:28:34,575 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:28:34,575 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:28:34,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:28:34,592 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:28:34,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:28:34,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:28:35,321 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-10-11 02:28:35,471 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-10-11 02:28:35,621 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-10-11 02:28:35,823 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-10-11 02:28:35,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:28:35,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:28:35,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-10-11 02:28:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341634810] [2021-10-11 02:28:35,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:28:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:35,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:28:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:28:35,853 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2021-10-11 02:28:35,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:35,961 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-11 02:28:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:28:35,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-10-11 02:28:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:35,964 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:28:35,964 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:28:35,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:28:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:28:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-10-11 02:28:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:28:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-10-11 02:28:35,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2021-10-11 02:28:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:35,975 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-10-11 02:28:35,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:28:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-10-11 02:28:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:28:35,976 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:35,976 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-10-11 02:28:36,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:28:36,193 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1282107604, now seen corresponding path program 2 times [2021-10-11 02:28:36,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:36,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510697307] [2021-10-11 02:28:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:28:36,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510697307] [2021-10-11 02:28:36,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757868510] [2021-10-11 02:28:36,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:36,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:28:36,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:28:36,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:28:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:28:36,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:28:36,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329515449] [2021-10-11 02:28:36,412 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:28:36,412 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:28:36,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:28:36,413 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:28:36,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:28:36,622 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:28:36,952 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-10-11 02:28:37,104 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-10-11 02:28:37,279 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-10-11 02:28:37,466 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-10-11 02:28:37,525 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:28:37,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:28:37,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-10-11 02:28:37,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312350937] [2021-10-11 02:28:37,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:28:37,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:37,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:28:37,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:28:37,529 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2021-10-11 02:28:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:37,604 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-11 02:28:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:28:37,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-10-11 02:28:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:37,606 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:28:37,606 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:28:37,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:28:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:28:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:28:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:28:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:28:37,607 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-11 02:28:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:37,608 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:28:37,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:28:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:28:37,608 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:28:37,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-11 02:28:37,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:28:37,917 INFO L262 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2021-10-11 02:28:37,917 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:28:37,918 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-11 02:28:37,918 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-11 02:28:37,918 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-11 02:28:37,919 INFO L265 CegarLoopResult]: At program point L44(lines 25 45) the Hoare annotation is: true [2021-10-11 02:28:37,919 INFO L258 CegarLoopResult]: At program point L38-2(lines 38 43) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0))) (or (and (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= ULTIMATE.start_main_~glob2_p_off~0 0) .cse0 (<= 1 ULTIMATE.start_main_~MAXPATHLEN~0)))) [2021-10-11 02:28:37,920 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:28:37,926 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-11 02:28:37,927 INFO L262 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-11 02:28:37,927 INFO L258 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) [2021-10-11 02:28:37,928 INFO L262 CegarLoopResult]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-10-11 02:28:37,928 INFO L258 CegarLoopResult]: At program point L18-5(lines 1 45) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) [2021-10-11 02:28:37,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:28:37 BoogieIcfgContainer [2021-10-11 02:28:37,955 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:28:37,956 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:28:37,956 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:28:37,956 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:28:37,957 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:33" (3/4) ... [2021-10-11 02:28:37,960 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:28:37,970 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-11 02:28:37,971 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 02:28:37,972 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:28:37,972 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:28:38,022 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a715e5-193b-4c27-a96d-6142a4ba0df0/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:28:38,022 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:28:38,023 INFO L168 Benchmark]: Toolchain (without parser) took 5270.47 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 65.4 MB in the beginning and 77.7 MB in the end (delta: -12.4 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:38,024 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory is still 82.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:38,024 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.59 ms. Allocated memory is still 102.8 MB. Free memory was 65.2 MB in the beginning and 78.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:38,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.72 ms. Allocated memory is still 102.8 MB. Free memory was 78.7 MB in the beginning and 77.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:38,025 INFO L168 Benchmark]: Boogie Preprocessor took 24.33 ms. Allocated memory is still 102.8 MB. Free memory was 77.3 MB in the beginning and 76.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:38,026 INFO L168 Benchmark]: RCFGBuilder took 409.83 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 62.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:38,026 INFO L168 Benchmark]: TraceAbstraction took 4467.88 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 61.3 MB in the beginning and 80.9 MB in the end (delta: -19.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:38,027 INFO L168 Benchmark]: Witness Printer took 66.72 ms. Allocated memory is still 132.1 MB. Free memory was 80.9 MB in the beginning and 77.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:38,030 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory is still 82.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.59 ms. Allocated memory is still 102.8 MB. Free memory was 65.2 MB in the beginning and 78.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.72 ms. Allocated memory is still 102.8 MB. Free memory was 78.7 MB in the beginning and 77.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.33 ms. Allocated memory is still 102.8 MB. Free memory was 77.3 MB in the beginning and 76.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 409.83 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 62.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4467.88 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 61.3 MB in the beginning and 80.9 MB in the end (delta: -19.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * Witness Printer took 66.72 ms. Allocated memory is still 132.1 MB. Free memory was 80.9 MB in the beginning and 77.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((!(0 == cond) && 0 <= glob2_p_off) && glob2_pathlim_off <= MAXPATHLEN) && glob2_p_off <= MAXPATHLEN - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((0 <= glob2_p_off && 1 <= cond) && glob2_pathlim_off <= MAXPATHLEN) && glob2_p_off <= MAXPATHLEN - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((0 <= glob2_p_off && 1 <= cond) && glob2_pathlim_off <= MAXPATHLEN) || ((glob2_p_off == 0 && glob2_pathlim_off <= MAXPATHLEN) && 1 <= MAXPATHLEN) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 24 SDslu, 37 SDs, 0 SdLazy, 65 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 15 NumberOfFragments, 49 HoareAnnotationTreeSize, 4 FomulaSimplifications, 210 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 70 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 3940 SizeOfPredicates, 14 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 21/51 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...