./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 608a161795639c070a2e0dd9cb77ec327f896e40581ac2ba975f6275c137af77 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:40:34,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:40:34,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:40:34,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:40:34,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:40:34,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:40:34,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:40:34,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:40:34,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:40:34,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:40:34,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:40:34,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:40:34,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:40:34,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:40:34,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:40:34,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:40:34,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:40:34,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:40:34,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:40:34,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:40:34,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:40:34,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:40:34,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:40:34,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:40:34,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:40:34,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:40:34,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:40:34,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:40:34,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:40:34,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:40:34,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:40:34,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:40:34,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:40:34,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:40:34,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:40:34,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:40:34,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:40:34,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:40:34,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:40:34,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:40:34,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:40:34,597 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:40:34,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:40:34,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:40:34,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:40:34,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:40:34,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:40:34,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:40:34,625 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:40:34,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:40:34,625 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:40:34,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:40:34,625 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:40:34,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:40:34,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:40:34,626 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:40:34,626 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:40:34,626 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:40:34,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:40:34,627 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:40:34,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:40:34,628 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:40:34,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:40:34,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:40:34,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:40:34,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:40:34,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:40:34,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:40:34,629 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:40:34,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:40:34,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:40:34,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:40:34,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:40:34,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:40:34,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:40:34,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:40:34,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:40:34,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:40:34,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:40:34,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:40:34,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:40:34,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:40:34,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:40:34,631 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608a161795639c070a2e0dd9cb77ec327f896e40581ac2ba975f6275c137af77 [2021-11-21 01:40:34,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:40:34,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:40:34,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:40:34,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:40:34,926 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:40:34,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2021-11-21 01:40:34,991 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/data/a7e910b04/5dde6ac11f0d42419e05c799bf27292a/FLAG9c0637ebe [2021-11-21 01:40:35,433 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:40:35,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2021-11-21 01:40:35,444 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/data/a7e910b04/5dde6ac11f0d42419e05c799bf27292a/FLAG9c0637ebe [2021-11-21 01:40:35,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/data/a7e910b04/5dde6ac11f0d42419e05c799bf27292a [2021-11-21 01:40:35,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:40:35,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:40:35,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:40:35,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:40:35,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:40:35,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:40:35" (1/1) ... [2021-11-21 01:40:35,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145bbbd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:35, skipping insertion in model container [2021-11-21 01:40:35,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:40:35" (1/1) ... [2021-11-21 01:40:35,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:40:35,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:40:36,071 WARN L230 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_ba63f029-55a2-4493-b96d-7a09f2538556/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i[295,308] [2021-11-21 01:40:36,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:40:36,096 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:40:36,113 WARN L230 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_ba63f029-55a2-4493-b96d-7a09f2538556/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i[295,308] [2021-11-21 01:40:36,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:40:36,136 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:40:36,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36 WrapperNode [2021-11-21 01:40:36,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:40:36,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:40:36,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:40:36,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:40:36,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,166 INFO L137 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2021-11-21 01:40:36,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:40:36,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:40:36,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:40:36,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:40:36,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:40:36,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:40:36,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:40:36,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:40:36,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:40:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:36,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:40:36,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:40:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:40:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure err [2021-11-21 01:40:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2021-11-21 01:40:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:40:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:40:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:40:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-21 01:40:36,256 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-21 01:40:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:40:36,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:40:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:40:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:40:36,317 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:40:36,318 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:40:36,401 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:40:36,418 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:40:36,418 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:40:36,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:40:36 BoogieIcfgContainer [2021-11-21 01:40:36,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:40:36,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:40:36,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:40:36,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:40:36,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:40:35" (1/3) ... [2021-11-21 01:40:36,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b08d808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:40:36, skipping insertion in model container [2021-11-21 01:40:36,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36" (2/3) ... [2021-11-21 01:40:36,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b08d808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:40:36, skipping insertion in model container [2021-11-21 01:40:36,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:40:36" (3/3) ... [2021-11-21 01:40:36,429 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2021-11-21 01:40:36,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:40:36,435 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:40:36,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:40:36,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:40:36,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:40:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:40:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:40:36,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:36,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:40:36,514 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errErr0ASSERT_VIOLATIONERROR_FUNCTION === [errErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:36,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1797267687, now seen corresponding path program 1 times [2021-11-21 01:40:36,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:40:36,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654150341] [2021-11-21 01:40:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:36,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:40:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:36,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:40:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654150341] [2021-11-21 01:40:36,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654150341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:40:36,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:36,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:40:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044242615] [2021-11-21 01:40:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:36,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:40:36,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:40:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:40:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:40:36,787 INFO L87 Difference]: Start difference. First operand has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:36,900 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-21 01:40:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:40:36,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:40:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:36,910 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:40:36,910 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 01:40:36,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:40:36,926 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:36,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:40:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 01:40:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-21 01:40:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:40:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2021-11-21 01:40:36,975 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 6 [2021-11-21 01:40:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:36,976 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2021-11-21 01:40:36,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2021-11-21 01:40:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:40:36,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:36,979 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:36,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:40:36,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errErr0ASSERT_VIOLATIONERROR_FUNCTION === [errErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1190020852, now seen corresponding path program 1 times [2021-11-21 01:40:36,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:40:36,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361670000] [2021-11-21 01:40:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:36,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:40:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:40:37,029 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:40:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:40:37,096 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:40:37,098 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:40:37,108 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:40:37,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:40:37,116 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-21 01:40:37,119 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:40:37,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:40:37 BoogieIcfgContainer [2021-11-21 01:40:37,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:40:37,141 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:40:37,141 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:40:37,142 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:40:37,142 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:40:36" (3/4) ... [2021-11-21 01:40:37,144 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 01:40:37,175 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:40:37,176 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:40:37,177 INFO L158 Benchmark]: Toolchain (without parser) took 1336.05ms. Allocated memory is still 109.1MB. Free memory was 68.9MB in the beginning and 44.8MB in the end (delta: 24.1MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2021-11-21 01:40:37,177 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 85.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:40:37,178 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.98ms. Allocated memory is still 109.1MB. Free memory was 68.7MB in the beginning and 84.6MB in the end (delta: -15.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:40:37,178 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.93ms. Allocated memory is still 109.1MB. Free memory was 84.6MB in the beginning and 83.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:40:37,179 INFO L158 Benchmark]: Boogie Preprocessor took 19.07ms. Allocated memory is still 109.1MB. Free memory was 83.4MB in the beginning and 82.4MB in the end (delta: 997.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:40:37,180 INFO L158 Benchmark]: RCFGBuilder took 234.46ms. Allocated memory is still 109.1MB. Free memory was 82.4MB in the beginning and 73.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:40:37,180 INFO L158 Benchmark]: TraceAbstraction took 718.23ms. Allocated memory is still 109.1MB. Free memory was 72.5MB in the beginning and 46.9MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-21 01:40:37,181 INFO L158 Benchmark]: Witness Printer took 34.44ms. Allocated memory is still 109.1MB. Free memory was 46.4MB in the beginning and 44.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:40:37,184 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 85.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 294.98ms. Allocated memory is still 109.1MB. Free memory was 68.7MB in the beginning and 84.6MB in the end (delta: -15.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.93ms. Allocated memory is still 109.1MB. Free memory was 84.6MB in the beginning and 83.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.07ms. Allocated memory is still 109.1MB. Free memory was 83.4MB in the beginning and 82.4MB in the end (delta: 997.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 234.46ms. Allocated memory is still 109.1MB. Free memory was 82.4MB in the beginning and 73.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 718.23ms. Allocated memory is still 109.1MB. Free memory was 72.5MB in the beginning and 46.9MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 34.44ms. Allocated memory is still 109.1MB. Free memory was 46.4MB in the beginning and 44.8MB in the end (delta: 1.6MB). 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L35] struct mutex m; [L36] m.is_locked = 0 VAL [m={5:0}] [L38] CALL mutex_lock(&m) VAL [a={5:0}] [L23] EXPR a->is_locked VAL [a={5:0}, a={5:0}, a->is_locked=0] [L23] COND FALSE !(a->is_locked == 1) [L24] a->is_locked = 1 [L38] RET mutex_lock(&m) VAL [m={5:0}] [L42] CALL mutex_lock(&m) VAL [a={5:0}] [L23] EXPR a->is_locked VAL [a={5:0}, a={5:0}, a->is_locked=1] [L23] COND TRUE a->is_locked == 1 [L23] CALL err() [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22 IncrementalHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 7 mSDtfsCounter, 22 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-21 01:40:37,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba63f029-55a2-4493-b96d-7a09f2538556/bin/utaipan-TEXQjIfE4P/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