./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --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 dedd0e691082a54e7ab91bc5c89cd5119d7051d93eccccd50f69369896fe2c2c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:51:42,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:51:43,019 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:51:43,027 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:51:43,028 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:51:43,069 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:51:43,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:51:43,070 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:51:43,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:51:43,076 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:51:43,077 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:51:43,077 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:51:43,078 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:51:43,079 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:51:43,080 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:51:43,080 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:51:43,081 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:51:43,081 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:51:43,082 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:51:43,082 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:51:43,084 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:51:43,084 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:51:43,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:51:43,086 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:51:43,086 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:51:43,087 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:51:43,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:51:43,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:51:43,102 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:51:43,102 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:51:43,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:51:43,104 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:51:43,104 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:51:43,104 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:51:43,105 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:51:43,105 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:51:43,105 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:51:43,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:51:43,106 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:51:43,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:51:43,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:51:43,107 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:51:43,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:51:43,107 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:51:43,108 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:51:43,108 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:51:43,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:51:43,109 INFO L153 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_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dedd0e691082a54e7ab91bc5c89cd5119d7051d93eccccd50f69369896fe2c2c [2023-11-24 23:51:43,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:51:43,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:51:43,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:51:43,525 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:51:43,526 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:51:43,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i [2023-11-24 23:51:46,705 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:51:46,962 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:51:46,963 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i [2023-11-24 23:51:46,971 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/data/bddd2cbb1/c481e9ffa5394a57a48c41eb487e051e/FLAG38d53738c [2023-11-24 23:51:47,291 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/data/bddd2cbb1/c481e9ffa5394a57a48c41eb487e051e [2023-11-24 23:51:47,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:51:47,303 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:51:47,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:51:47,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:51:47,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:51:47,314 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,315 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1405775c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47, skipping insertion in model container [2023-11-24 23:51:47,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,339 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:51:47,516 WARN L240 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_0f380593-8484-406e-8aa3-ce9b3d89d4e3/sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i[825,838] [2023-11-24 23:51:47,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:51:47,542 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:51:47,553 WARN L240 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_0f380593-8484-406e-8aa3-ce9b3d89d4e3/sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i[825,838] [2023-11-24 23:51:47,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:51:47,573 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:51:47,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47 WrapperNode [2023-11-24 23:51:47,574 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:51:47,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:51:47,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:51:47,575 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:51:47,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,606 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 42 [2023-11-24 23:51:47,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:51:47,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:51:47,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:51:47,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:51:47,617 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,625 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,632 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:51:47,633 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:51:47,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:51:47,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:51:47,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (1/1) ... [2023-11-24 23:51:47,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:51:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:47,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:51:47,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:51:47,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:51:47,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:51:47,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:51:47,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:51:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:51:47,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:51:47,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:51:47,804 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:51:47,806 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:51:48,002 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:51:48,060 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:51:48,060 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:51:48,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:51:48 BoogieIcfgContainer [2023-11-24 23:51:48,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:51:48,065 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:51:48,065 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:51:48,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:51:48,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:51:47" (1/3) ... [2023-11-24 23:51:48,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5b70c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:51:48, skipping insertion in model container [2023-11-24 23:51:48,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:47" (2/3) ... [2023-11-24 23:51:48,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5b70c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:51:48, skipping insertion in model container [2023-11-24 23:51:48,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:51:48" (3/3) ... [2023-11-24 23:51:48,079 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2023-11-24 23:51:48,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:51:48,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:51:48,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:51:48,167 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=LoopHeads, 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;@2d5a5fa2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:51:48,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:51:48,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 23:51:48,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:48,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 23:51:48,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:48,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1976234, now seen corresponding path program 1 times [2023-11-24 23:51:48,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:48,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738422045] [2023-11-24 23:51:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:48,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:48,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738422045] [2023-11-24 23:51:48,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738422045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:48,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:48,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:51:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245286265] [2023-11-24 23:51:48,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:48,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:48,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:48,805 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:48,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:48,860 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2023-11-24 23:51:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:51:48,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 23:51:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:48,870 INFO L225 Difference]: With dead ends: 16 [2023-11-24 23:51:48,871 INFO L226 Difference]: Without dead ends: 9 [2023-11-24 23:51:48,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:48,877 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:48,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:51:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-24 23:51:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-11-24 23:51:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-11-24 23:51:48,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-11-24 23:51:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:48,911 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-11-24 23:51:48,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-11-24 23:51:48,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 23:51:48,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:48,913 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-24 23:51:48,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:51:48,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:48,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1250391179, now seen corresponding path program 1 times [2023-11-24 23:51:48,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:48,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109647004] [2023-11-24 23:51:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:49,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109647004] [2023-11-24 23:51:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109647004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825152784] [2023-11-24 23:51:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:49,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:49,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:49,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:51:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:49,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 23:51:49,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:49,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:51:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:49,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825152784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:51:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078725850] [2023-11-24 23:51:49,491 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:51:49,491 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:51:49,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:51:49,499 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:51:49,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:51:50,339 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:51:51,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '89#(and (= 28 |ULTIMATE.start_glob2_~pathlim#1.offset|) (<= 2 ~tmp~0.base) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_glob2_~pathbuf#1.base|) (<= 0 |ULTIMATE.start_glob2_~p~0#1.offset|) (= |ULTIMATE.start_glob2_#in~pathlim#1.offset| 28) (= |ULTIMATE.start_main_~#pathbuf~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~bound~0#1.base|) (= |ULTIMATE.start_main_~bound~0#1.offset| 28) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_glob2_~pathbuf#1.offset| 0) (<= 2 |ULTIMATE.start_glob2_#in~pathlim#1.base|) (<= 2 |ULTIMATE.start_glob2_#in~pathbuf#1.base|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2 |ULTIMATE.start_main_~#pathbuf~0#1.base|) (= |ULTIMATE.start_glob2_#in~pathbuf#1.offset| 0) (<= |ULTIMATE.start_glob2_~p~0#1.offset| 28) (<= 2 |ULTIMATE.start_glob2_~p~0#1.base|) (= ~tmp~0.offset 4) (<= 2 |ULTIMATE.start_glob2_~pathlim#1.base|))' at error location [2023-11-24 23:51:51,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:51:51,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:51:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2023-11-24 23:51:51,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8345808] [2023-11-24 23:51:51,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:51:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:51:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:51:51,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:51:51,186 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:51,255 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-24 23:51:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:51:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-24 23:51:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:51,256 INFO L225 Difference]: With dead ends: 14 [2023-11-24 23:51:51,256 INFO L226 Difference]: Without dead ends: 12 [2023-11-24 23:51:51,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:51:51,259 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:51,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:51:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-24 23:51:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-11-24 23:51:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-11-24 23:51:51,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2023-11-24 23:51:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:51,265 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-11-24 23:51:51,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-11-24 23:51:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:51:51,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:51,268 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2023-11-24 23:51:51,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:51,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:51,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:51,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash -147091510, now seen corresponding path program 2 times [2023-11-24 23:51:51,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:51,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251487703] [2023-11-24 23:51:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:51,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:51:51,503 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 23:51:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:51:51,531 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-24 23:51:51,531 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 23:51:51,533 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-24 23:51:51,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:51:51,538 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-24 23:51:51,542 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:51:51,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:51:51 BoogieIcfgContainer [2023-11-24 23:51:51,587 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:51:51,588 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:51:51,588 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:51:51,588 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:51:51,589 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:51:48" (3/4) ... [2023-11-24 23:51:51,590 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-24 23:51:51,661 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/witness.graphml [2023-11-24 23:51:51,666 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:51:51,667 INFO L158 Benchmark]: Toolchain (without parser) took 4364.37ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 140.0MB in the beginning and 80.3MB in the end (delta: 59.7MB). Peak memory consumption was 96.0MB. Max. memory is 16.1GB. [2023-11-24 23:51:51,667 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 130.0MB. Free memory was 101.2MB in the beginning and 101.0MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:51:51,668 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.69ms. Allocated memory is still 172.0MB. Free memory was 139.8MB in the beginning and 135.1MB in the end (delta: 4.7MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2023-11-24 23:51:51,668 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.20ms. Allocated memory is still 172.0MB. Free memory was 135.1MB in the beginning and 133.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:51:51,669 INFO L158 Benchmark]: Boogie Preprocessor took 25.73ms. Allocated memory is still 172.0MB. Free memory was 133.0MB in the beginning and 132.2MB in the end (delta: 808.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:51:51,669 INFO L158 Benchmark]: RCFGBuilder took 428.93ms. Allocated memory is still 172.0MB. Free memory was 132.2MB in the beginning and 134.9MB in the end (delta: -2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 23:51:51,670 INFO L158 Benchmark]: TraceAbstraction took 3522.60ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 134.6MB in the beginning and 82.4MB in the end (delta: 52.2MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. [2023-11-24 23:51:51,670 INFO L158 Benchmark]: Witness Printer took 78.66ms. Allocated memory is still 207.6MB. Free memory was 82.4MB in the beginning and 80.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:51:51,673 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 130.0MB. Free memory was 101.2MB in the beginning and 101.0MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.69ms. Allocated memory is still 172.0MB. Free memory was 139.8MB in the beginning and 135.1MB in the end (delta: 4.7MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.20ms. Allocated memory is still 172.0MB. Free memory was 135.1MB in the beginning and 133.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.73ms. Allocated memory is still 172.0MB. Free memory was 133.0MB in the beginning and 132.2MB in the end (delta: 808.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 428.93ms. Allocated memory is still 172.0MB. Free memory was 132.2MB in the beginning and 134.9MB in the end (delta: -2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3522.60ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 134.6MB in the beginning and 82.4MB in the end (delta: 52.2MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. * Witness Printer took 78.66ms. Allocated memory is still 207.6MB. Free memory was 82.4MB in the beginning and 80.3MB 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: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] Char *tmp; [L40] Char pathbuf[1 +1]; [L42] Char *bound = pathbuf + sizeof(pathbuf) - 1; [L44] tmp = pathbuf + sizeof(pathbuf)/sizeof(*pathbuf) - 1 [L46] CALL glob2 (pathbuf, bound) [L27] Char *p; [L29] p = pathbuf VAL [p={3:0}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L29] COND TRUE p <= pathlim [L31] CALL __VERIFIER_assert(p<=tmp) [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, tmp={3:4}] [L31] RET __VERIFIER_assert(p<=tmp) [L32] *p = 1 [L29] p++ VAL [p={3:4}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L29] COND TRUE p <= pathlim [L31] CALL __VERIFIER_assert(p<=tmp) [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, tmp={3:4}] [L31] RET __VERIFIER_assert(p<=tmp) [L32] *p = 1 [L29] p++ VAL [p={3:8}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L29] COND TRUE p <= pathlim [L31] CALL __VERIFIER_assert(p<=tmp) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, tmp={3:4}] [L16] reach_error() VAL [\old(cond)=0, cond=0, tmp={3:4}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30 IncrementalHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 4 mSDtfsCounter, 30 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=2, InterpolantAutomatonStates: 12, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 130 SizeOfPredicates, 11 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 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! [2023-11-24 23:51:51,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f380593-8484-406e-8aa3-ce9b3d89d4e3/bin/utaipan-verify-SwPr7d2a91/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