./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS --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 8cf5a35873afe0e5012214bd680ff6c9f10002775e1599934b6c286bf71e0e3d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:09:20,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:09:20,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:09:20,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:09:20,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:09:20,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:09:20,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:09:20,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:09:20,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:09:20,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:09:20,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:09:20,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:09:20,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:09:20,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:09:20,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:09:20,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:09:20,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:09:20,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:09:20,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:09:20,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:09:20,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:09:20,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:09:20,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:09:20,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:09:20,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:09:20,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:09:20,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:09:20,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:09:20,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:09:20,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:09:20,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:09:20,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:09:20,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:09:20,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:09:20,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:09:20,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:09:20,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:09:20,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:09:20,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:09:20,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:09:20,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:09:20,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:09:20,496 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:09:20,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:09:20,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:09:20,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:09:20,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:09:20,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:09:20,503 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:09:20,503 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:09:20,503 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:09:20,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:09:20,505 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:09:20,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:09:20,506 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:09:20,506 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:09:20,506 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:09:20,507 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:09:20,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:09:20,507 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:09:20,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:09:20,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:09:20,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:09:20,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:09:20,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:09:20,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:09:20,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:09:20,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:09:20,512 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:09:20,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:09:20,513 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:09:20,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:09:20,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:09:20,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:09:20,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:09:20,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:09:20,515 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:09:20,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:09:20,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:09:20,516 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:09:20,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:09:20,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:09:20,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:09:20,517 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cf5a35873afe0e5012214bd680ff6c9f10002775e1599934b6c286bf71e0e3d [2022-11-19 08:09:20,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:09:20,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:09:20,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:09:20,879 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:09:20,880 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:09:20,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2022-11-19 08:09:20,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/data/82d903e44/5eabdce0173540f8884508a479e7ead5/FLAGefbe908a4 [2022-11-19 08:09:21,490 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:09:21,491 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2022-11-19 08:09:21,498 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/data/82d903e44/5eabdce0173540f8884508a479e7ead5/FLAGefbe908a4 [2022-11-19 08:09:21,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/data/82d903e44/5eabdce0173540f8884508a479e7ead5 [2022-11-19 08:09:21,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:09:21,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:09:21,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:09:21,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:09:21,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:09:21,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:09:21" (1/1) ... [2022-11-19 08:09:21,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763362fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:21, skipping insertion in model container [2022-11-19 08:09:21,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:09:21" (1/1) ... [2022-11-19 08:09:21,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:09:21,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:09:22,148 WARN L234 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_c9c95989-17e5-44c6-b0af-e3201d0347d9/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[354,367] [2022-11-19 08:09:22,156 WARN L234 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_c9c95989-17e5-44c6-b0af-e3201d0347d9/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[442,455] [2022-11-19 08:09:22,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:09:22,175 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:09:22,191 WARN L234 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_c9c95989-17e5-44c6-b0af-e3201d0347d9/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[354,367] [2022-11-19 08:09:22,193 WARN L234 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_c9c95989-17e5-44c6-b0af-e3201d0347d9/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[442,455] [2022-11-19 08:09:22,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:09:22,210 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:09:22,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22 WrapperNode [2022-11-19 08:09:22,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:09:22,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:09:22,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:09:22,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:09:22,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,256 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2022-11-19 08:09:22,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:09:22,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:09:22,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:09:22,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:09:22,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,291 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:09:22,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:09:22,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:09:22,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:09:22,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:09:22,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:22,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:09:22,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:09:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:09:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 08:09:22,403 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 08:09:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:09:22,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:09:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:09:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2022-11-19 08:09:22,404 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2022-11-19 08:09:22,492 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:09:22,495 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:09:22,661 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:09:22,676 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:09:22,677 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:09:22,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:09:22 BoogieIcfgContainer [2022-11-19 08:09:22,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:09:22,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:09:22,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:09:22,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:09:22,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:09:21" (1/3) ... [2022-11-19 08:09:22,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756c8b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:09:22, skipping insertion in model container [2022-11-19 08:09:22,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (2/3) ... [2022-11-19 08:09:22,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756c8b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:09:22, skipping insertion in model container [2022-11-19 08:09:22,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:09:22" (3/3) ... [2022-11-19 08:09:22,691 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2022-11-19 08:09:22,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:09:22,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:09:22,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:09:22,780 INFO L357 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, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67667f62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:09:22,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:09:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:09:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:09:22,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:22,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:22,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -524178264, now seen corresponding path program 1 times [2022-11-19 08:09:22,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:22,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708939830] [2022-11-19 08:09:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:22,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:23,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:23,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708939830] [2022-11-19 08:09:23,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708939830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:23,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:23,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:09:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963484260] [2022-11-19 08:09:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:23,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:09:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:09:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:09:23,180 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:09:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:23,310 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-19 08:09:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:09:23,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-19 08:09:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:23,322 INFO L225 Difference]: With dead ends: 29 [2022-11-19 08:09:23,323 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 08:09:23,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:09:23,331 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:23,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 08:09:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 08:09:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:09:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-11-19 08:09:23,379 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2022-11-19 08:09:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:23,380 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-11-19 08:09:23,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:09:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-11-19 08:09:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:09:23,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:23,392 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:23,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:09:23,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1711106781, now seen corresponding path program 1 times [2022-11-19 08:09:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:23,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130058863] [2022-11-19 08:09:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:09:23,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 08:09:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:09:23,502 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 08:09:23,503 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 08:09:23,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-19 08:09:23,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location fErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-19 08:09:23,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:09:23,517 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-19 08:09:23,524 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:09:23,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:09:23 BoogieIcfgContainer [2022-11-19 08:09:23,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:09:23,573 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:09:23,574 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:09:23,575 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:09:23,575 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:09:22" (3/4) ... [2022-11-19 08:09:23,578 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 08:09:23,642 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:09:23,642 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:09:23,646 INFO L158 Benchmark]: Toolchain (without parser) took 1808.59ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 47.1MB in the beginning and 107.9MB in the end (delta: -60.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:09:23,647 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 63.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:09:23,649 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.48ms. Allocated memory is still 109.1MB. Free memory was 46.8MB in the beginning and 84.7MB in the end (delta: -37.9MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2022-11-19 08:09:23,652 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.05ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:09:23,653 INFO L158 Benchmark]: Boogie Preprocessor took 37.22ms. Allocated memory is still 109.1MB. Free memory was 83.5MB in the beginning and 82.6MB in the end (delta: 884.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:09:23,653 INFO L158 Benchmark]: RCFGBuilder took 383.96ms. Allocated memory is still 109.1MB. Free memory was 82.6MB in the beginning and 73.0MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:09:23,654 INFO L158 Benchmark]: TraceAbstraction took 887.27ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 72.1MB in the beginning and 110.0MB in the end (delta: -37.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:09:23,655 INFO L158 Benchmark]: Witness Printer took 69.24ms. Allocated memory is still 136.3MB. Free memory was 110.0MB in the beginning and 107.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:09:23,658 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 63.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 375.48ms. Allocated memory is still 109.1MB. Free memory was 46.8MB in the beginning and 84.7MB in the end (delta: -37.9MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.05ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.22ms. Allocated memory is still 109.1MB. Free memory was 83.5MB in the beginning and 82.6MB in the end (delta: 884.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 383.96ms. Allocated memory is still 109.1MB. Free memory was 82.6MB in the beginning and 73.0MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 887.27ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 72.1MB in the beginning and 110.0MB in the end (delta: -37.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 69.24ms. Allocated memory is still 136.3MB. Free memory was 110.0MB in the beginning and 107.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] CALL f(4) VAL [\old(n)=4] [L9] COND FALSE !(n<3) [L10] n-- VAL [\old(n)=4, n=3] [L11] CALL f2(n) VAL [\old(n)=3] [L16] COND FALSE !(n<3) [L17] n-- VAL [\old(n)=3, n=2] [L18] CALL f(n) VAL [\old(n)=2] [L9] COND TRUE n<3 VAL [\old(n)=2, n=2] [L18] RET f(n) VAL [\old(n)=3, n=2] [L19] reach_error() VAL [\old(n)=3, n=2] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 47 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43 IncrementalHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 10 mSDtfsCounter, 43 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=1, InterpolantAutomatonStates: 7, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 21 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 incorrect! [2022-11-19 08:09:23,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c95989-17e5-44c6-b0af-e3201d0347d9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE