./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/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_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e946e8dea30db7efb52f6f71a24f03cd895152f9df0eae9d8d1291d135f806ee --- 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 08:25:26,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:25:26,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:25:26,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:25:26,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:25:26,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:25:26,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:25:26,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:25:26,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:25:26,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:25:26,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:25:26,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:25:26,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:25:26,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:25:26,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:25:26,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:25:26,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:25:26,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:25:26,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:25:26,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:25:26,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:25:26,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:25:26,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:25:26,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:25:26,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:25:26,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:25:26,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:25:26,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:25:26,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:25:26,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:25:26,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:25:26,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:25:26,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:25:26,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:25:26,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:25:26,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:25:26,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:25:26,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:25:26,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:25:26,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:25:26,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:25:26,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:25:26,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:25:26,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:25:26,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:25:26,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:25:26,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:25:26,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:25:26,359 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:25:26,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:25:26,360 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:25:26,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:25:26,360 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:25:26,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:25:26,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:25:26,361 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:25:26,362 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:25:26,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:25:26,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:25:26,362 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:25:26,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:25:26,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:25:26,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:25:26,364 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:25:26,364 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:25:26,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:25:26,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:25:26,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:25:26,365 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:25:26,366 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:25:26,366 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:25:26,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:25:26,366 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:25:26,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:25:26,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:25:26,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:25:26,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:25:26,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:25:26,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:25:26,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:25:26,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:25:26,369 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:25:26,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:25:26,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:25:26,369 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_154f2fa5-2813-4ae3-9886-5318e45d9de4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e946e8dea30db7efb52f6f71a24f03cd895152f9df0eae9d8d1291d135f806ee [2022-11-19 08:25:26,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:25:26,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:25:26,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:25:26,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:25:26,679 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:25:26,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i [2022-11-19 08:25:26,766 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/data/2061457c1/75150e1825c54a428a21b151be0ccd52/FLAG7877bc8e6 [2022-11-19 08:25:27,317 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:25:27,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i [2022-11-19 08:25:27,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/data/2061457c1/75150e1825c54a428a21b151be0ccd52/FLAG7877bc8e6 [2022-11-19 08:25:27,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/data/2061457c1/75150e1825c54a428a21b151be0ccd52 [2022-11-19 08:25:27,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:25:27,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:25:27,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:25:27,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:25:27,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:25:27,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:25:27" (1/1) ... [2022-11-19 08:25:27,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523d7f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:27, skipping insertion in model container [2022-11-19 08:25:27,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:25:27" (1/1) ... [2022-11-19 08:25:27,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:25:27,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:25:27,958 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_154f2fa5-2813-4ae3-9886-5318e45d9de4/sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i[949,962] [2022-11-19 08:25:28,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:25:28,289 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:25:28,311 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_154f2fa5-2813-4ae3-9886-5318e45d9de4/sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i[949,962] [2022-11-19 08:25:28,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:25:28,420 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:25:28,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28 WrapperNode [2022-11-19 08:25:28,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:25:28,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:25:28,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:25:28,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:25:28,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,473 INFO L138 Inliner]: procedures = 177, calls = 89, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 181 [2022-11-19 08:25:28,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:25:28,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:25:28,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:25:28,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:25:28,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,502 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:25:28,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:25:28,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:25:28,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:25:28,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (1/1) ... [2022-11-19 08:25:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:25:28,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:28,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:25:28,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154f2fa5-2813-4ae3-9886-5318e45d9de4/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:25:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:25:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:25:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 08:25:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:25:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:25:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:25:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-11-19 08:25:28,626 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-11-19 08:25:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-11-19 08:25:28,626 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-11-19 08:25:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-11-19 08:25:28,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-11-19 08:25:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2022-11-19 08:25:28,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2022-11-19 08:25:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:25:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 08:25:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:25:28,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:25:28,629 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 08:25:28,871 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:25:28,873 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:25:29,565 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:25:30,170 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:25:30,171 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:25:30,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:25:30 BoogieIcfgContainer [2022-11-19 08:25:30,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:25:30,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:25:30,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:25:30,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:25:30,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:25:27" (1/3) ... [2022-11-19 08:25:30,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f37699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:25:30, skipping insertion in model container [2022-11-19 08:25:30,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:28" (2/3) ... [2022-11-19 08:25:30,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f37699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:25:30, skipping insertion in model container [2022-11-19 08:25:30,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:25:30" (3/3) ... [2022-11-19 08:25:30,183 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.opt.i [2022-11-19 08:25:30,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:25:30,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2022-11-19 08:25:30,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 08:25:30,336 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-19 08:25:30,386 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 08:25:30,401 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 213 transitions, 446 flow [2022-11-19 08:25:30,409 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 213 transitions, 446 flow [2022-11-19 08:25:30,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 213 transitions, 446 flow [2022-11-19 08:25:30,553 INFO L130 PetriNetUnfolder]: 2/209 cut-off events. [2022-11-19 08:25:30,553 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-19 08:25:30,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 209 events. 2/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 327 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2022-11-19 08:25:30,568 INFO L119 LiptonReduction]: Number of co-enabled transitions 10466 [2022-11-19 08:25:51,096 INFO L134 LiptonReduction]: Checked pairs total: 62196 [2022-11-19 08:25:51,096 INFO L136 LiptonReduction]: Total number of compositions: 190 [2022-11-19 08:25:51,105 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 109 places, 97 transitions, 214 flow [2022-11-19 08:26:07,637 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 529583 states, 440339 states have (on average 5.550530386815613) internal successors, (2444115), 529582 states have internal predecessors, (2444115), 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) [2022-11-19 08:26:07,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:26:07,672 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@32d29822, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:26:07,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 96 error locations. [2022-11-19 08:26:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 529583 states, 440339 states have (on average 5.550530386815613) internal successors, (2444115), 529582 states have internal predecessors, (2444115), 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) [2022-11-19 08:26:08,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-19 08:26:08,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:08,379 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-19 08:26:08,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2022-11-19 08:26:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1232, now seen corresponding path program 1 times [2022-11-19 08:26:08,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:08,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577832336] [2022-11-19 08:26:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:08,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:09,721 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 08:26:09,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:09,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577832336] [2022-11-19 08:26:09,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577832336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:09,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:09,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-19 08:26:09,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937399698] [2022-11-19 08:26:09,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:09,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:26:09,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:26:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:26:10,660 INFO L87 Difference]: Start difference. First operand has 529583 states, 440339 states have (on average 5.550530386815613) internal successors, (2444115), 529582 states have internal predecessors, (2444115), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-19 08:26:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:14,724 INFO L93 Difference]: Finished difference Result 178219 states and 805045 transitions. [2022-11-19 08:26:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:26:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-19 08:26:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:16,902 INFO L225 Difference]: With dead ends: 178219 [2022-11-19 08:26:16,902 INFO L226 Difference]: Without dead ends: 178219 [2022-11-19 08:26:16,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:26:16,906 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:16,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:26:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178219 states. [2022-11-19 08:26:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178219 to 178219. [2022-11-19 08:26:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178219 states, 159355 states have (on average 5.05189670860657) internal successors, (805045), 178218 states have internal predecessors, (805045), 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) [2022-11-19 08:26:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178219 states to 178219 states and 805045 transitions. [2022-11-19 08:26:28,712 INFO L78 Accepts]: Start accepts. Automaton has 178219 states and 805045 transitions. Word has length 1 [2022-11-19 08:26:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:28,712 INFO L495 AbstractCegarLoop]: Abstraction has 178219 states and 805045 transitions. [2022-11-19 08:26:28,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-19 08:26:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 178219 states and 805045 transitions. [2022-11-19 08:26:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:26:28,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:28,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:26:28,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:26:28,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2022-11-19 08:26:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:28,716 INFO L85 PathProgramCache]: Analyzing trace with hash 37678412, now seen corresponding path program 1 times [2022-11-19 08:26:28,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:28,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707784762] [2022-11-19 08:26:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:28,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:29,084 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 08:26:29,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707784762] [2022-11-19 08:26:29,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707784762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:29,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:29,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:26:29,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438482228] [2022-11-19 08:26:29,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:29,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:26:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:26:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:26:29,088 INFO L87 Difference]: Start difference. First operand 178219 states and 805045 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-19 08:26:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:30,215 INFO L93 Difference]: Finished difference Result 76802 states and 337264 transitions. [2022-11-19 08:26:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:26:30,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2022-11-19 08:26:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:31,894 INFO L225 Difference]: With dead ends: 76802 [2022-11-19 08:26:31,894 INFO L226 Difference]: Without dead ends: 76802 [2022-11-19 08:26:31,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:26:31,896 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:31,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:26:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76802 states. [2022-11-19 08:26:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76802 to 76802. [2022-11-19 08:26:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76802 states, 72221 states have (on average 4.669888259647471) internal successors, (337264), 76801 states have internal predecessors, (337264), 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) [2022-11-19 08:26:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76802 states to 76802 states and 337264 transitions. [2022-11-19 08:26:35,648 INFO L78 Accepts]: Start accepts. Automaton has 76802 states and 337264 transitions. Word has length 4 [2022-11-19 08:26:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:35,663 INFO L495 AbstractCegarLoop]: Abstraction has 76802 states and 337264 transitions. [2022-11-19 08:26:35,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-19 08:26:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 76802 states and 337264 transitions. [2022-11-19 08:26:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:26:35,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:35,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:26:35,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:26:35,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2022-11-19 08:26:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash 37678413, now seen corresponding path program 1 times [2022-11-19 08:26:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:35,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935256541] [2022-11-19 08:26:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:35,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms