./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0f4ea6e3bcbb2b79339dce82d9fa934022810e04d651b4bbb6fb3904b8f8c98 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:04:44,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:04:44,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:04:44,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:04:44,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:04:44,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:04:44,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:04:44,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:04:44,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:04:44,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:04:44,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:04:44,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:04:44,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:04:44,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:04:44,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:04:44,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:04:44,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:04:44,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:04:44,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:04:44,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:04:44,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:04:44,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:04:44,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:04:44,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:04:44,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:04:44,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:04:44,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:04:44,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:04:44,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:04:44,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:04:44,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:04:44,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:04:44,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:04:44,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:04:44,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:04:44,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:04:44,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:04:44,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:04:44,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:04:44,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:04:44,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:04:44,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-24 11:04:44,558 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:04:44,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:04:44,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:04:44,559 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:04:44,559 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:04:44,560 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:04:44,560 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:04:44,560 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:04:44,560 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:04:44,560 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:04:44,561 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:04:44,562 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:04:44,562 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:04:44,562 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:04:44,562 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:04:44,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 11:04:44,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 11:04:44,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:04:44,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:04:44,564 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 11:04:44,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:04:44,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:04:44,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:04:44,565 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 11:04:44,565 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 11:04:44,565 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 11:04:44,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:04:44,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:04:44,567 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:04:44,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:04:44,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:04:44,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:04:44,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:04:44,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:04:44,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:04:44,569 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:04:44,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:04:44,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:04:44,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:04:44,569 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_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0f4ea6e3bcbb2b79339dce82d9fa934022810e04d651b4bbb6fb3904b8f8c98 [2021-10-24 11:04:44,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:04:44,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:04:44,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:04:44,946 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:04:44,947 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:04:44,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/locks/test_locks_6.c [2021-10-24 11:04:45,019 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/data/7ffbd8a0e/b64b05d621ba42fa97874b43c1362c68/FLAG207a37edf [2021-10-24 11:04:45,491 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:04:45,496 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/sv-benchmarks/c/locks/test_locks_6.c [2021-10-24 11:04:45,507 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/data/7ffbd8a0e/b64b05d621ba42fa97874b43c1362c68/FLAG207a37edf [2021-10-24 11:04:45,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/data/7ffbd8a0e/b64b05d621ba42fa97874b43c1362c68 [2021-10-24 11:04:45,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:04:45,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:04:45,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:04:45,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:04:45,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:04:45,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:04:45" (1/1) ... [2021-10-24 11:04:45,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41484bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:45, skipping insertion in model container [2021-10-24 11:04:45,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:04:45" (1/1) ... [2021-10-24 11:04:45,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:04:45,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:04:46,033 WARN L228 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_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-10-24 11:04:46,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:04:46,046 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:04:46,081 WARN L228 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_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-10-24 11:04:46,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:04:46,096 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:04:46,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46 WrapperNode [2021-10-24 11:04:46,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:04:46,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:04:46,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:04:46,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:04:46,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:04:46,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:04:46,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:04:46,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:04:46,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:04:46,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:04:46,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:04:46,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:04:46,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (1/1) ... [2021-10-24 11:04:46,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:04:46,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:04:46,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:04:46,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:04:46,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:04:46,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:04:46,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:04:46,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:04:46,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:04:46,618 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-24 11:04:46,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:04:46 BoogieIcfgContainer [2021-10-24 11:04:46,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:04:46,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:04:46,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:04:46,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:04:46,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:04:45" (1/3) ... [2021-10-24 11:04:46,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1414f640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:04:46, skipping insertion in model container [2021-10-24 11:04:46,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:04:46" (2/3) ... [2021-10-24 11:04:46,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1414f640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:04:46, skipping insertion in model container [2021-10-24 11:04:46,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:04:46" (3/3) ... [2021-10-24 11:04:46,629 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2021-10-24 11:04:46,634 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:04:46,635 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-24 11:04:46,679 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:04:46,686 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 [2021-10-24 11:04:46,686 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-24 11:04:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 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) [2021-10-24 11:04:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 11:04:46,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:46,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 11:04:46,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-24 11:04:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:46,723 INFO L82 PathProgramCache]: Analyzing trace with hash 4929034, now seen corresponding path program 1 times [2021-10-24 11:04:46,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:04:46,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90171251] [2021-10-24 11:04:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:46,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:04:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:46,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:04:46,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90171251] [2021-10-24 11:04:46,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90171251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:46,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:46,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:04:46,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60250927] [2021-10-24 11:04:46,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 11:04:46,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:04:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 11:04:46,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:04:46,940 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:04:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:46,952 INFO L93 Difference]: Finished difference Result 21 states and 32 transitions. [2021-10-24 11:04:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 11:04:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-24 11:04:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:46,962 INFO L225 Difference]: With dead ends: 21 [2021-10-24 11:04:46,962 INFO L226 Difference]: Without dead ends: 20 [2021-10-24 11:04:46,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:04:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-24 11:04:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-24 11:04:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 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) [2021-10-24 11:04:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2021-10-24 11:04:46,999 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 4 [2021-10-24 11:04:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:46,999 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2021-10-24 11:04:47,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:04:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2021-10-24 11:04:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 11:04:47,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:47,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 11:04:47,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:04:47,004 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-24 11:04:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash 149031945, now seen corresponding path program 1 times [2021-10-24 11:04:47,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:04:47,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785233568] [2021-10-24 11:04:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:47,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:04:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:47,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:04:47,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785233568] [2021-10-24 11:04:47,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785233568] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:47,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:47,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-24 11:04:47,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375935640] [2021-10-24 11:04:47,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:04:47,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:04:47,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:04:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:04:47,119 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 3 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) [2021-10-24 11:04:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:47,123 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2021-10-24 11:04:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:04:47,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2021-10-24 11:04:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:47,124 INFO L225 Difference]: With dead ends: 19 [2021-10-24 11:04:47,125 INFO L226 Difference]: Without dead ends: 17 [2021-10-24 11:04:47,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:04:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-24 11:04:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-24 11:04:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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) [2021-10-24 11:04:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 28 transitions. [2021-10-24 11:04:47,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 28 transitions. Word has length 5 [2021-10-24 11:04:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:47,132 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 28 transitions. [2021-10-24 11:04:47,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2021-10-24 11:04:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 28 transitions. [2021-10-24 11:04:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 11:04:47,134 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:47,134 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 11:04:47,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 11:04:47,135 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-24 11:04:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:47,135 INFO L82 PathProgramCache]: Analyzing trace with hash 328829427, now seen corresponding path program 1 times [2021-10-24 11:04:47,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:04:47,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669859181] [2021-10-24 11:04:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:47,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:04:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:47,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:04:47,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669859181] [2021-10-24 11:04:47,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669859181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:47,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:47,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:04:47,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893547503] [2021-10-24 11:04:47,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:04:47,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:04:47,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:04:47,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,246 INFO L87 Difference]: Start difference. First operand 17 states and 28 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-10-24 11:04:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:47,281 INFO L93 Difference]: Finished difference Result 31 states and 50 transitions. [2021-10-24 11:04:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:04:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2021-10-24 11:04:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:47,296 INFO L225 Difference]: With dead ends: 31 [2021-10-24 11:04:47,296 INFO L226 Difference]: Without dead ends: 31 [2021-10-24 11:04:47,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-24 11:04:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2021-10-24 11:04:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 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) [2021-10-24 11:04:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2021-10-24 11:04:47,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 6 [2021-10-24 11:04:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:47,301 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2021-10-24 11:04:47,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-10-24 11:04:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2021-10-24 11:04:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 11:04:47,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:47,302 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:04:47,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 11:04:47,302 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-24 11:04:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1603992289, now seen corresponding path program 1 times [2021-10-24 11:04:47,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:04:47,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326360355] [2021-10-24 11:04:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:47,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:04:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:47,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:04:47,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326360355] [2021-10-24 11:04:47,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326360355] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:47,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:47,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:04:47,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964904834] [2021-10-24 11:04:47,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:04:47,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:04:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:04:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,414 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-10-24 11:04:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:47,445 INFO L93 Difference]: Finished difference Result 29 states and 45 transitions. [2021-10-24 11:04:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:04:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-24 11:04:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:47,450 INFO L225 Difference]: With dead ends: 29 [2021-10-24 11:04:47,451 INFO L226 Difference]: Without dead ends: 29 [2021-10-24 11:04:47,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-24 11:04:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2021-10-24 11:04:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 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) [2021-10-24 11:04:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 26 transitions. [2021-10-24 11:04:47,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 26 transitions. Word has length 7 [2021-10-24 11:04:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:47,456 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 26 transitions. [2021-10-24 11:04:47,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-10-24 11:04:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 26 transitions. [2021-10-24 11:04:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 11:04:47,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:47,457 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:04:47,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 11:04:47,458 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-24 11:04:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1815631608, now seen corresponding path program 1 times [2021-10-24 11:04:47,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:04:47,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369814146] [2021-10-24 11:04:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:47,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:04:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:47,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:04:47,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369814146] [2021-10-24 11:04:47,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369814146] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:47,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:47,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:04:47,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573655337] [2021-10-24 11:04:47,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:04:47,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:04:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:04:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,505 INFO L87 Difference]: Start difference. First operand 17 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:04:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:47,522 INFO L93 Difference]: Finished difference Result 27 states and 40 transitions. [2021-10-24 11:04:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:04:47,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 11:04:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:47,523 INFO L225 Difference]: With dead ends: 27 [2021-10-24 11:04:47,523 INFO L226 Difference]: Without dead ends: 27 [2021-10-24 11:04:47,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-24 11:04:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-10-24 11:04:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 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) [2021-10-24 11:04:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2021-10-24 11:04:47,527 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 8 [2021-10-24 11:04:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:47,527 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-10-24 11:04:47,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:04:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 25 transitions. [2021-10-24 11:04:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 11:04:47,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:47,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:04:47,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 11:04:47,529 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-24 11:04:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:47,529 INFO L82 PathProgramCache]: Analyzing trace with hash -449789674, now seen corresponding path program 1 times [2021-10-24 11:04:47,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:04:47,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011118597] [2021-10-24 11:04:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:47,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:04:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:47,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:04:47,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011118597] [2021-10-24 11:04:47,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011118597] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:47,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:47,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:04:47,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331314540] [2021-10-24 11:04:47,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:04:47,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:04:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:04:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,577 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-24 11:04:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:47,603 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2021-10-24 11:04:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:04:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-10-24 11:04:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:47,604 INFO L225 Difference]: With dead ends: 25 [2021-10-24 11:04:47,604 INFO L226 Difference]: Without dead ends: 25 [2021-10-24 11:04:47,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-24 11:04:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2021-10-24 11:04:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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) [2021-10-24 11:04:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2021-10-24 11:04:47,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 9 [2021-10-24 11:04:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:47,608 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2021-10-24 11:04:47,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-24 11:04:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2021-10-24 11:04:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 11:04:47,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:47,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:04:47,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 11:04:47,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-24 11:04:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1058362339, now seen corresponding path program 1 times [2021-10-24 11:04:47,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:04:47,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078313765] [2021-10-24 11:04:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:47,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:04:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:47,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:04:47,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078313765] [2021-10-24 11:04:47,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078313765] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:47,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:47,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:04:47,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17615094] [2021-10-24 11:04:47,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:04:47,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:04:47,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:04:47,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,698 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-24 11:04:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:47,718 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2021-10-24 11:04:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:04:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-24 11:04:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:47,720 INFO L225 Difference]: With dead ends: 23 [2021-10-24 11:04:47,720 INFO L226 Difference]: Without dead ends: 23 [2021-10-24 11:04:47,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-24 11:04:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-10-24 11:04:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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) [2021-10-24 11:04:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-10-24 11:04:47,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 10 [2021-10-24 11:04:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:47,725 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-24 11:04:47,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-24 11:04:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-10-24 11:04:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 11:04:47,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:47,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:04:47,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 11:04:47,726 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-24 11:04:47,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:47,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1550721867, now seen corresponding path program 1 times [2021-10-24 11:04:47,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:04:47,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963149632] [2021-10-24 11:04:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:47,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:04:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:47,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:04:47,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963149632] [2021-10-24 11:04:47,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963149632] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:47,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:47,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:04:47,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824989508] [2021-10-24 11:04:47,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:04:47,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:04:47,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:04:47,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,767 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-24 11:04:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:47,780 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-10-24 11:04:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:04:47,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2021-10-24 11:04:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:47,781 INFO L225 Difference]: With dead ends: 17 [2021-10-24 11:04:47,782 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 11:04:47,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:04:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 11:04:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 11:04:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-24 11:04:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 11:04:47,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-10-24 11:04:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:47,783 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 11:04:47,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-24 11:04:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 11:04:47,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 11:04:47,786 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 11:04:47,791 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 11:04:47,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 11:04:47,795 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:04:47,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:04:47 BoogieIcfgContainer [2021-10-24 11:04:47,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:04:47,798 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:04:47,798 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:04:47,798 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:04:47,798 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:04:46" (3/4) ... [2021-10-24 11:04:47,801 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 11:04:47,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-24 11:04:47,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-24 11:04:47,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-24 11:04:47,818 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 11:04:47,869 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:04:47,869 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:04:47,870 INFO L168 Benchmark]: Toolchain (without parser) took 2019.49 ms. Allocated memory is still 107.0 MB. Free memory was 71.8 MB in the beginning and 50.4 MB in the end (delta: 21.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:04:47,871 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 107.0 MB. Free memory was 80.8 MB in the beginning and 80.7 MB in the end (delta: 30.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:04:47,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.21 ms. Allocated memory is still 107.0 MB. Free memory was 71.6 MB in the beginning and 82.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:04:47,872 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.52 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 80.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:04:47,872 INFO L168 Benchmark]: Boogie Preprocessor took 40.48 ms. Allocated memory is still 107.0 MB. Free memory was 80.9 MB in the beginning and 79.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:04:47,873 INFO L168 Benchmark]: RCFGBuilder took 432.74 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 63.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 11:04:47,873 INFO L168 Benchmark]: TraceAbstraction took 1174.70 ms. Allocated memory is still 107.0 MB. Free memory was 63.5 MB in the beginning and 53.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. [2021-10-24 11:04:47,874 INFO L168 Benchmark]: Witness Printer took 71.27 ms. Allocated memory is still 107.0 MB. Free memory was 53.4 MB in the beginning and 50.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:04:47,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 107.0 MB. Free memory was 80.8 MB in the beginning and 80.7 MB in the end (delta: 30.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.21 ms. Allocated memory is still 107.0 MB. Free memory was 71.6 MB in the beginning and 82.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.52 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 80.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.48 ms. Allocated memory is still 107.0 MB. Free memory was 80.9 MB in the beginning and 79.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 432.74 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 63.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1174.70 ms. Allocated memory is still 107.0 MB. Free memory was 63.5 MB in the beginning and 53.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. * Witness Printer took 71.27 ms. Allocated memory is still 107.0 MB. Free memory was 53.4 MB in the beginning and 50.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 107]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1118.4ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 13.7ms, AutomataDifference: 228.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 196 SDtfs, 139 SDslu, 191 SDs, 0 SdLazy, 62 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 50 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.8ms SsaConstructionTime, 168.6ms SatisfiabilityAnalysisTime, 396.3ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 198 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-24 11:04:47,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5e7bda-19ef-45e6-adce-4d0ecb4cbb64/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...