./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 643182475b6f3736876ef9d58257e821498e53d566e4d81dd06a8f042f299e0b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:56:11,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:56:11,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:56:11,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:56:11,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:56:11,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:56:11,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:56:11,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:56:11,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:56:11,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:56:11,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:56:11,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:56:11,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:56:11,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:56:11,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:56:11,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:56:11,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:56:11,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:56:11,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:56:11,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:56:11,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:56:11,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:56:11,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:56:11,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:56:11,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:56:11,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:56:11,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:56:11,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:56:11,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:56:11,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:56:11,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:56:11,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:56:11,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:56:11,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:56:11,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:56:11,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:56:11,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:56:11,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:56:11,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:56:11,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:56:11,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:56:11,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-11-25 18:56:11,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:56:11,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:56:11,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:56:11,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:56:11,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:56:11,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:56:11,355 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:56:11,355 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:56:11,355 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:56:11,356 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:56:11,356 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:56:11,356 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:56:11,356 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:56:11,357 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:56:11,357 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:56:11,357 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:56:11,358 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:56:11,358 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:56:11,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:56:11,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:56:11,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:56:11,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:56:11,360 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:56:11,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:56:11,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:56:11,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:56:11,361 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:56:11,362 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:56:11,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:56:11,362 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:56:11,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:56:11,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:56:11,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:56:11,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:56:11,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:56:11,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:56:11,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:56:11,365 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:56:11,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:56:11,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:56:11,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:56:11,366 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_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 643182475b6f3736876ef9d58257e821498e53d566e4d81dd06a8f042f299e0b [2021-11-25 18:56:11,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:56:11,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:56:11,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:56:11,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:56:11,706 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:56:11,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-properties/list_flag-1.i [2021-11-25 18:56:11,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/data/07442171d/caf8e0bad5fb47e6bec7aaed5fc12745/FLAGc2a21cf68 [2021-11-25 18:56:12,568 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:56:12,569 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/sv-benchmarks/c/list-properties/list_flag-1.i [2021-11-25 18:56:12,600 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/data/07442171d/caf8e0bad5fb47e6bec7aaed5fc12745/FLAGc2a21cf68 [2021-11-25 18:56:12,620 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/data/07442171d/caf8e0bad5fb47e6bec7aaed5fc12745 [2021-11-25 18:56:12,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:56:12,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:56:12,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:56:12,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:56:12,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:56:12,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:56:12" (1/1) ... [2021-11-25 18:56:12,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc77d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:12, skipping insertion in model container [2021-11-25 18:56:12,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:56:12" (1/1) ... [2021-11-25 18:56:12,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:56:12,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:56:13,156 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_9a780f24-87c7-47e1-a177-4d5b2c6da77c/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2021-11-25 18:56:13,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:56:13,179 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:56:13,246 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_9a780f24-87c7-47e1-a177-4d5b2c6da77c/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2021-11-25 18:56:13,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:56:13,294 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:56:13,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13 WrapperNode [2021-11-25 18:56:13,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:56:13,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:56:13,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:56:13,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:56:13,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,399 INFO L137 Inliner]: procedures = 124, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2021-11-25 18:56:13,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:56:13,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:56:13,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:56:13,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:56:13,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:56:13,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:56:13,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:56:13,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:56:13,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (1/1) ... [2021-11-25 18:56:13,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:56:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:56:13,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:56:13,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:56:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-25 18:56:13,543 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-25 18:56:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:56:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:56:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:56:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:56:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:56:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:56:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:56:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:56:13,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:56:13,679 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:56:13,681 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:56:13,745 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-25 18:56:14,087 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:56:14,153 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:56:14,154 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 18:56:14,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:56:14 BoogieIcfgContainer [2021-11-25 18:56:14,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:56:14,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:56:14,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:56:14,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:56:14,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:56:12" (1/3) ... [2021-11-25 18:56:14,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ccd58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:56:14, skipping insertion in model container [2021-11-25 18:56:14,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:56:13" (2/3) ... [2021-11-25 18:56:14,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ccd58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:56:14, skipping insertion in model container [2021-11-25 18:56:14,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:56:14" (3/3) ... [2021-11-25 18:56:14,174 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2021-11-25 18:56:14,181 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:56:14,183 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-11-25 18:56:14,260 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:56:14,276 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=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:56:14,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-11-25 18:56:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 26 states have (on average 2.269230769230769) internal successors, (59), 49 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:56:14,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:14,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:56:14,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-11-25 18:56:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash 143549184, now seen corresponding path program 1 times [2021-11-25 18:56:14,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:14,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793896186] [2021-11-25 18:56:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:14,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:56:14,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793896186] [2021-11-25 18:56:14,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793896186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:56:14,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:56:14,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:56:14,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171892924] [2021-11-25 18:56:14,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:56:14,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:56:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:56:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:56:14,639 INFO L87 Difference]: Start difference. First operand has 51 states, 26 states have (on average 2.269230769230769) internal successors, (59), 49 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-25 18:56:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:14,688 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-11-25 18:56:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:56:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-25 18:56:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:14,701 INFO L225 Difference]: With dead ends: 51 [2021-11-25 18:56:14,701 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 18:56:14,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:56:14,709 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:14,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:56:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 18:56:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-25 18:56:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 45 states have internal predecessors, (50), 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) [2021-11-25 18:56:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-25 18:56:14,766 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 5 [2021-11-25 18:56:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:14,766 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-25 18:56:14,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-25 18:56:14,767 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-25 18:56:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:56:14,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:14,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:56:14,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:56:14,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-11-25 18:56:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash 155023737, now seen corresponding path program 1 times [2021-11-25 18:56:14,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:14,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863279952] [2021-11-25 18:56:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:14,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:56:14,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863279952] [2021-11-25 18:56:14,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863279952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:56:14,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:56:14,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:56:14,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782716178] [2021-11-25 18:56:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:56:14,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:56:14,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:56:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:56:14,914 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-25 18:56:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:15,083 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-11-25 18:56:15,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:56:15,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-25 18:56:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:15,088 INFO L225 Difference]: With dead ends: 54 [2021-11-25 18:56:15,089 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 18:56:15,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:56:15,099 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:15,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 20 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:56:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 18:56:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-11-25 18:56:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.875) internal successors, (60), 48 states have internal predecessors, (60), 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) [2021-11-25 18:56:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-11-25 18:56:15,121 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 6 [2021-11-25 18:56:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:15,126 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-11-25 18:56:15,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-25 18:56:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-11-25 18:56:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:56:15,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:15,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:56:15,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:56:15,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-11-25 18:56:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash 155023738, now seen corresponding path program 1 times [2021-11-25 18:56:15,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:15,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786584342] [2021-11-25 18:56:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:15,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:56:15,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786584342] [2021-11-25 18:56:15,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786584342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:56:15,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:56:15,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:56:15,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363894949] [2021-11-25 18:56:15,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:56:15,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:56:15,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:15,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:56:15,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:56:15,248 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-25 18:56:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:15,393 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-11-25 18:56:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:56:15,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-25 18:56:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:15,397 INFO L225 Difference]: With dead ends: 63 [2021-11-25 18:56:15,397 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 18:56:15,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:56:15,409 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:15,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 35 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:56:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 18:56:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2021-11-25 18:56:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 57 states have internal predecessors, (66), 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) [2021-11-25 18:56:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-11-25 18:56:15,425 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 6 [2021-11-25 18:56:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:15,426 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-11-25 18:56:15,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-25 18:56:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-11-25 18:56:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:56:15,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:15,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:15,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:56:15,429 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-11-25 18:56:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash -244933092, now seen corresponding path program 1 times [2021-11-25 18:56:15,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:15,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42296780] [2021-11-25 18:56:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:15,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:56:15,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42296780] [2021-11-25 18:56:15,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42296780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:56:15,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:56:15,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:56:15,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794010271] [2021-11-25 18:56:15,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:56:15,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:56:15,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:56:15,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:56:15,596 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:15,748 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-11-25 18:56:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:56:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:56:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:15,754 INFO L225 Difference]: With dead ends: 85 [2021-11-25 18:56:15,754 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 18:56:15,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:56:15,763 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:15,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:56:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 18:56:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2021-11-25 18:56:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 60 states have internal predecessors, (70), 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) [2021-11-25 18:56:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-11-25 18:56:15,772 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 11 [2021-11-25 18:56:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:15,772 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-11-25 18:56:15,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-11-25 18:56:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:56:15,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:15,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:15,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:56:15,774 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-11-25 18:56:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash -264972815, now seen corresponding path program 1 times [2021-11-25 18:56:15,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21679970] [2021-11-25 18:56:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:15,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:56:15,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:15,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21679970] [2021-11-25 18:56:15,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21679970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:56:15,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:56:15,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:56:15,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029855107] [2021-11-25 18:56:15,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:56:15,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:56:15,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:56:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:56:15,859 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:16,027 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-11-25 18:56:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:56:16,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:56:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:16,033 INFO L225 Difference]: With dead ends: 74 [2021-11-25 18:56:16,034 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 18:56:16,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:56:16,035 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:16,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 98 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:56:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 18:56:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-11-25 18:56:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.565217391304348) internal successors, (72), 62 states have internal predecessors, (72), 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) [2021-11-25 18:56:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-25 18:56:16,053 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 11 [2021-11-25 18:56:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:16,053 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-25 18:56:16,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-25 18:56:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:56:16,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:16,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:16,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:56:16,055 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-11-25 18:56:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:16,056 INFO L85 PathProgramCache]: Analyzing trace with hash 996928875, now seen corresponding path program 1 times [2021-11-25 18:56:16,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:16,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109487967] [2021-11-25 18:56:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:16,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:56:16,099 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:56:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:56:16,158 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:56:16,159 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:56:16,160 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK (21 of 22 remaining) [2021-11-25 18:56:16,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (20 of 22 remaining) [2021-11-25 18:56:16,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (19 of 22 remaining) [2021-11-25 18:56:16,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (18 of 22 remaining) [2021-11-25 18:56:16,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (17 of 22 remaining) [2021-11-25 18:56:16,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (16 of 22 remaining) [2021-11-25 18:56:16,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (15 of 22 remaining) [2021-11-25 18:56:16,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (14 of 22 remaining) [2021-11-25 18:56:16,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (13 of 22 remaining) [2021-11-25 18:56:16,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (12 of 22 remaining) [2021-11-25 18:56:16,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (11 of 22 remaining) [2021-11-25 18:56:16,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (10 of 22 remaining) [2021-11-25 18:56:16,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (9 of 22 remaining) [2021-11-25 18:56:16,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (8 of 22 remaining) [2021-11-25 18:56:16,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (7 of 22 remaining) [2021-11-25 18:56:16,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (6 of 22 remaining) [2021-11-25 18:56:16,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (5 of 22 remaining) [2021-11-25 18:56:16,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (4 of 22 remaining) [2021-11-25 18:56:16,167 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (3 of 22 remaining) [2021-11-25 18:56:16,167 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (2 of 22 remaining) [2021-11-25 18:56:16,167 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (1 of 22 remaining) [2021-11-25 18:56:16,168 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 22 remaining) [2021-11-25 18:56:16,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:56:16,172 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-25 18:56:16,177 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:56:16,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:56:16 BoogieIcfgContainer [2021-11-25 18:56:16,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:56:16,202 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:56:16,202 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:56:16,202 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:56:16,203 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:56:14" (3/4) ... [2021-11-25 18:56:16,206 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 18:56:16,246 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:56:16,246 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:56:16,247 INFO L158 Benchmark]: Toolchain (without parser) took 3621.43ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 69.5MB in the beginning and 80.8MB in the end (delta: -11.2MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2021-11-25 18:56:16,247 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 100.7MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:56:16,248 INFO L158 Benchmark]: CACSL2BoogieTranslator took 663.36ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 69.2MB in the beginning and 103.2MB in the end (delta: -34.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-25 18:56:16,248 INFO L158 Benchmark]: Boogie Procedure Inliner took 103.91ms. Allocated memory is still 136.3MB. Free memory was 103.2MB in the beginning and 101.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:56:16,249 INFO L158 Benchmark]: Boogie Preprocessor took 53.81ms. Allocated memory is still 136.3MB. Free memory was 101.1MB in the beginning and 100.2MB in the end (delta: 834.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:56:16,249 INFO L158 Benchmark]: RCFGBuilder took 703.83ms. Allocated memory is still 136.3MB. Free memory was 99.6MB in the beginning and 84.1MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-25 18:56:16,250 INFO L158 Benchmark]: TraceAbstraction took 2038.61ms. Allocated memory is still 136.3MB. Free memory was 83.5MB in the beginning and 82.9MB in the end (delta: 600.7kB). Peak memory consumption was 1.2MB. Max. memory is 16.1GB. [2021-11-25 18:56:16,250 INFO L158 Benchmark]: Witness Printer took 44.42ms. Allocated memory is still 136.3MB. Free memory was 82.9MB in the beginning and 80.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:56:16,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 100.7MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 663.36ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 69.2MB in the beginning and 103.2MB in the end (delta: -34.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 103.91ms. Allocated memory is still 136.3MB. Free memory was 103.2MB in the beginning and 101.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.81ms. Allocated memory is still 136.3MB. Free memory was 101.1MB in the beginning and 100.2MB in the end (delta: 834.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 703.83ms. Allocated memory is still 136.3MB. Free memory was 99.6MB in the beginning and 84.1MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2038.61ms. Allocated memory is still 136.3MB. Free memory was 83.5MB in the beginning and 82.9MB in the end (delta: 600.7kB). Peak memory consumption was 1.2MB. Max. memory is 16.1GB. * Witness Printer took 44.42ms. Allocated memory is still 136.3MB. Free memory was 82.9MB in the beginning and 80.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) VAL [a={-1:0}, flag=0] [L536] p = a VAL [a={-1:0}, flag=0, p={-1:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a VAL [a={-1:0}, flag=0, p={-1:0}] [L550] COND FALSE !(\read(flag)) VAL [a={-1:0}, flag=0, p={-1:0}] [L554] EXPR p->h VAL [a={-1:0}, flag=0, p={-1:0}, p->h=3] [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h VAL [a={-1:0}, flag=0, p={-1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 52 locations, 22 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 255 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 255 mSDsluCounter, 304 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 153 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 263 IncrementalHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 151 mSDtfsCounter, 263 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=5, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 45 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 161 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 2/2 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! [2021-11-25 18:56:16,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a780f24-87c7-47e1-a177-4d5b2c6da77c/bin/utaipan-eEHZpOm5b7/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(valid-memcleanup)