./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_2.i --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_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8708d72a830c5b897b9a667c6367e709c7302fa81ab6e6c80a90a68a6807b5fb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8708d72a830c5b897b9a667c6367e709c7302fa81ab6e6c80a90a68a6807b5fb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:37:45,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:37:45,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:37:45,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:37:45,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:37:45,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:37:45,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:37:45,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:37:45,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:37:45,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:37:45,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:37:45,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:37:45,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:37:45,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:37:45,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:37:45,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:37:45,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:37:45,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:37:45,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:37:45,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:37:45,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:37:45,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:37:45,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:37:45,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:37:45,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:37:45,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:37:45,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:37:45,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:37:45,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:37:45,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:37:45,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:37:45,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:37:45,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:37:45,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:37:45,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:37:45,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:37:45,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:37:45,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:37:45,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:37:45,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:37:45,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:37:45,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:37:45,573 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:37:45,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:37:45,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:37:45,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:37:45,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:37:45,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:37:45,578 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:37:45,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:37:45,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:37:45,579 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:37:45,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:37:45,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:37:45,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:37:45,582 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:37:45,582 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:37:45,582 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:37:45,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:37:45,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:37:45,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:37:45,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:37:45,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:37:45,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:37:45,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:37:45,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:37:45,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:37:45,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:37:45,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:37:45,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:37:45,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:37:45,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8708d72a830c5b897b9a667c6367e709c7302fa81ab6e6c80a90a68a6807b5fb [2021-10-21 19:37:45,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:37:46,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:37:46,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:37:46,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:37:46,044 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:37:46,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-10-21 19:37:46,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data/4ef6064e3/01328fa8fcaa492bafd3ed552f971ae2/FLAG9e4af7f62 [2021-10-21 19:37:46,947 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:37:46,948 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-10-21 19:37:46,964 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data/4ef6064e3/01328fa8fcaa492bafd3ed552f971ae2/FLAG9e4af7f62 [2021-10-21 19:37:47,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data/4ef6064e3/01328fa8fcaa492bafd3ed552f971ae2 [2021-10-21 19:37:47,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:37:47,183 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:37:47,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:37:47,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:37:47,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:37:47,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f742a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47, skipping insertion in model container [2021-10-21 19:37:47,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:37:47,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:37:47,695 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_e36f392d-4a39-4282-bc2e-af072952f4d2/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-10-21 19:37:47,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:37:47,712 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:37:47,798 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_e36f392d-4a39-4282-bc2e-af072952f4d2/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-10-21 19:37:47,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:37:47,856 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:37:47,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47 WrapperNode [2021-10-21 19:37:47,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:37:47,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:37:47,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:37:47,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:37:47,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:37:47,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:37:47,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:37:47,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:37:47,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (1/1) ... [2021-10-21 19:37:47,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:37:48,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:48,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:37:48,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:37:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:37:48,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:37:48,087 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:37:48,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:37:48,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:37:48,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:37:48,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:37:48,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:37:48,088 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:37:48,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:37:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:37:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:37:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:37:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:37:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:37:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:37:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:37:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2021-10-21 19:37:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:37:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:37:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:37:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:37:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:37:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:37:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:37:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:37:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:37:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:37:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:37:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:37:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:37:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:37:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:37:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:37:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:37:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:37:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:37:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:37:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:37:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:37:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:37:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:37:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:37:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:37:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:37:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:37:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:37:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:37:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:37:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:37:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:37:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:37:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:37:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:37:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:37:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:37:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:37:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:37:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:37:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:37:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:37:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:37:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:37:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:37:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:37:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:37:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:37:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:37:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:37:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:37:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:37:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:37:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:37:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:37:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:37:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:37:48,103 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:37:48,103 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:37:48,103 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:37:48,103 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:37:48,104 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:37:48,104 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:37:48,104 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:37:48,104 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:37:48,104 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:37:48,104 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:37:48,105 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:37:48,105 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:37:48,105 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:37:48,105 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:37:48,105 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:37:48,106 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:37:48,106 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:37:48,106 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:37:48,106 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:37:48,106 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:37:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:37:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:37:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:37:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:37:48,108 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:37:48,108 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:37:48,108 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:37:48,108 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:37:48,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:37:48,108 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:37:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:37:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:37:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:37:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:37:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:37:48,110 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:37:48,110 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:37:48,110 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:37:48,110 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:37:48,110 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:37:48,111 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:37:48,111 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:37:48,111 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:37:48,111 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:37:48,111 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:37:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:37:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:37:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:37:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:37:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:37:48,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:37:48,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:37:48,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:37:48,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:37:48,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:37:48,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:37:48,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:37:48,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:37:48,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:37:48,446 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:37:48,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:37:48,829 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-21 19:37:48,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:48 BoogieIcfgContainer [2021-10-21 19:37:48,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:37:48,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:37:48,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:37:48,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:37:48,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:37:47" (1/3) ... [2021-10-21 19:37:48,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4fc50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:37:48, skipping insertion in model container [2021-10-21 19:37:48,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:47" (2/3) ... [2021-10-21 19:37:48,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4fc50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:37:48, skipping insertion in model container [2021-10-21 19:37:48,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:48" (3/3) ... [2021-10-21 19:37:48,849 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext_2.i [2021-10-21 19:37:48,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:37:48,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-10-21 19:37:48,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:37:48,941 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 [2021-10-21 19:37:48,941 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-10-21 19:37:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 92 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:37:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:37:48,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:48,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:48,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash -234092837, now seen corresponding path program 1 times [2021-10-21 19:37:49,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:49,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400696538] [2021-10-21 19:37:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:49,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:49,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:49,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:49,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400696538] [2021-10-21 19:37:49,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400696538] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:49,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:49,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:37:49,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681564909] [2021-10-21 19:37:49,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:37:49,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:37:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:37:49,489 INFO L87 Difference]: Start difference. First operand has 98 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 92 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:49,836 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-10-21 19:37:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:37:49,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:37:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:49,850 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:37:49,850 INFO L226 Difference]: Without dead ends: 90 [2021-10-21 19:37:49,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:37:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-21 19:37:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-21 19:37:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 86 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-10-21 19:37:49,914 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 11 [2021-10-21 19:37:49,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:49,915 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-10-21 19:37:49,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-10-21 19:37:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:37:49,916 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:49,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:49,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:37:49,917 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1332069837, now seen corresponding path program 1 times [2021-10-21 19:37:49,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:49,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085509607] [2021-10-21 19:37:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:49,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:50,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:50,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085509607] [2021-10-21 19:37:50,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085509607] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:50,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:50,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:37:50,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668115319] [2021-10-21 19:37:50,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:37:50,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:37:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:37:50,164 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:50,549 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-10-21 19:37:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:37:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 19:37:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:50,557 INFO L225 Difference]: With dead ends: 111 [2021-10-21 19:37:50,557 INFO L226 Difference]: Without dead ends: 111 [2021-10-21 19:37:50,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:37:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-21 19:37:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-10-21 19:37:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 87 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2021-10-21 19:37:50,585 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 12 [2021-10-21 19:37:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:50,586 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2021-10-21 19:37:50,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2021-10-21 19:37:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:37:50,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:50,588 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:50,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:37:50,589 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:50,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:50,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1332069838, now seen corresponding path program 1 times [2021-10-21 19:37:50,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:50,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303700707] [2021-10-21 19:37:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:50,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:50,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:50,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:50,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303700707] [2021-10-21 19:37:50,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303700707] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:50,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:50,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:37:50,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143745164] [2021-10-21 19:37:50,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:37:50,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:37:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:37:50,827 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:51,228 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-10-21 19:37:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:37:51,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 19:37:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:51,236 INFO L225 Difference]: With dead ends: 128 [2021-10-21 19:37:51,236 INFO L226 Difference]: Without dead ends: 128 [2021-10-21 19:37:51,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:37:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-21 19:37:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-10-21 19:37:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 107 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-10-21 19:37:51,268 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 12 [2021-10-21 19:37:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:51,268 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-10-21 19:37:51,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-10-21 19:37:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:37:51,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:51,271 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:51,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:37:51,272 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 296118254, now seen corresponding path program 1 times [2021-10-21 19:37:51,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:51,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980847696] [2021-10-21 19:37:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:51,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:51,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:51,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:51,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980847696] [2021-10-21 19:37:51,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980847696] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:51,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:51,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:37:51,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191548554] [2021-10-21 19:37:51,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:37:51,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:51,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:37:51,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:37:51,459 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:51,997 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2021-10-21 19:37:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:37:51,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 19:37:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:52,000 INFO L225 Difference]: With dead ends: 156 [2021-10-21 19:37:52,000 INFO L226 Difference]: Without dead ends: 156 [2021-10-21 19:37:52,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:37:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-21 19:37:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 115. [2021-10-21 19:37:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 86 states have (on average 1.5116279069767442) internal successors, (130), 111 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2021-10-21 19:37:52,010 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 21 [2021-10-21 19:37:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:52,010 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2021-10-21 19:37:52,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2021-10-21 19:37:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:37:52,012 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:52,013 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:52,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:37:52,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:52,014 INFO L82 PathProgramCache]: Analyzing trace with hash 296118255, now seen corresponding path program 1 times [2021-10-21 19:37:52,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:52,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625780197] [2021-10-21 19:37:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:52,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:52,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:52,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625780197] [2021-10-21 19:37:52,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625780197] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:52,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:52,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:37:52,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976057149] [2021-10-21 19:37:52,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:37:52,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:52,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:37:52,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:37:52,231 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:52,864 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2021-10-21 19:37:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:37:52,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 19:37:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:52,867 INFO L225 Difference]: With dead ends: 159 [2021-10-21 19:37:52,867 INFO L226 Difference]: Without dead ends: 159 [2021-10-21 19:37:52,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:37:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-21 19:37:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 99. [2021-10-21 19:37:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.4794520547945205) internal successors, (108), 95 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-10-21 19:37:52,875 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 21 [2021-10-21 19:37:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:52,876 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-10-21 19:37:52,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-10-21 19:37:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:37:52,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:52,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:52,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:37:52,878 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:52,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:52,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1432577259, now seen corresponding path program 1 times [2021-10-21 19:37:52,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:52,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715642139] [2021-10-21 19:37:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:52,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:53,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:53,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715642139] [2021-10-21 19:37:53,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715642139] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:53,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:53,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:37:53,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516923316] [2021-10-21 19:37:53,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:37:53,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:37:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:37:53,053 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:53,386 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2021-10-21 19:37:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:37:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-21 19:37:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:53,389 INFO L225 Difference]: With dead ends: 191 [2021-10-21 19:37:53,389 INFO L226 Difference]: Without dead ends: 191 [2021-10-21 19:37:53,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:37:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-21 19:37:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-10-21 19:37:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 106 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-10-21 19:37:53,397 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 22 [2021-10-21 19:37:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:53,398 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-10-21 19:37:53,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-10-21 19:37:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:37:53,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:53,400 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:53,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:37:53,401 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1350239013, now seen corresponding path program 1 times [2021-10-21 19:37:53,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:53,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349440316] [2021-10-21 19:37:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:53,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:53,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:53,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349440316] [2021-10-21 19:37:53,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349440316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:53,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:53,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:37:53,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975162182] [2021-10-21 19:37:53,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:37:53,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:37:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:37:53,513 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:53,940 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2021-10-21 19:37:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:37:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-21 19:37:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:53,943 INFO L225 Difference]: With dead ends: 138 [2021-10-21 19:37:53,943 INFO L226 Difference]: Without dead ends: 138 [2021-10-21 19:37:53,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:37:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-21 19:37:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2021-10-21 19:37:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 104 states have internal predecessors, (121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-10-21 19:37:53,963 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 24 [2021-10-21 19:37:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:53,964 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-10-21 19:37:53,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-10-21 19:37:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:37:53,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:53,966 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:53,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:37:53,967 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:53,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1350239012, now seen corresponding path program 1 times [2021-10-21 19:37:53,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:53,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720190226] [2021-10-21 19:37:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:53,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:54,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:54,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:54,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720190226] [2021-10-21 19:37:54,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720190226] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:54,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:54,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:37:54,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378530721] [2021-10-21 19:37:54,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:37:54,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:37:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:37:54,182 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:54,706 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2021-10-21 19:37:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:37:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-21 19:37:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:54,714 INFO L225 Difference]: With dead ends: 136 [2021-10-21 19:37:54,714 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 19:37:54,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:37:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 19:37:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-10-21 19:37:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 89 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-10-21 19:37:54,720 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 24 [2021-10-21 19:37:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:54,720 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-10-21 19:37:54,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:54,721 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-10-21 19:37:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:37:54,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:54,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:54,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:37:54,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:37:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:54,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2025386131, now seen corresponding path program 1 times [2021-10-21 19:37:54,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:54,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025719768] [2021-10-21 19:37:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:54,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:37:54,748 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:37:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:37:54,812 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:37:54,813 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:37:54,814 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:37:54,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:37:54,821 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:37:54,822 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:37:54,822 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:37:54,823 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 19:37:54,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 19:37:54,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 19:37:54,825 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 19:37:54,825 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 19:37:54,825 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-21 19:37:54,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-21 19:37:54,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 19:37:54,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 19:37:54,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 19:37:54,827 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-21 19:37:54,827 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-21 19:37:54,827 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-21 19:37:54,827 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-21 19:37:54,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-21 19:37:54,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-21 19:37:54,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-21 19:37:54,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-21 19:37:54,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-21 19:37:54,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-21 19:37:54,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-21 19:37:54,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-21 19:37:54,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-21 19:37:54,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-21 19:37:54,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-21 19:37:54,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-21 19:37:54,831 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:54,831 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:54,831 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:54,832 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:54,832 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:54,832 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:54,833 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:37:54,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:37:54,851 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:37:54,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:37:54 BoogieIcfgContainer [2021-10-21 19:37:54,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:37:54,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:37:54,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:37:54,898 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:37:54,898 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:48" (3/4) ... [2021-10-21 19:37:54,904 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:37:54,905 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:37:54,907 INFO L168 Benchmark]: Toolchain (without parser) took 7722.29 ms. Allocated memory was 121.6 MB in the beginning and 180.4 MB in the end (delta: 58.7 MB). Free memory was 80.2 MB in the beginning and 114.7 MB in the end (delta: -34.5 MB). Peak memory consumption was 25.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:54,908 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 121.6 MB. Free memory is still 97.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:37:54,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 673.73 ms. Allocated memory is still 121.6 MB. Free memory was 80.0 MB in the beginning and 88.4 MB in the end (delta: -8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:54,911 INFO L168 Benchmark]: Boogie Preprocessor took 123.05 ms. Allocated memory is still 121.6 MB. Free memory was 88.4 MB in the beginning and 85.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:54,912 INFO L168 Benchmark]: RCFGBuilder took 847.91 ms. Allocated memory is still 121.6 MB. Free memory was 85.3 MB in the beginning and 60.6 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:54,912 INFO L168 Benchmark]: TraceAbstraction took 6062.77 ms. Allocated memory was 121.6 MB in the beginning and 180.4 MB in the end (delta: 58.7 MB). Free memory was 60.1 MB in the beginning and 115.7 MB in the end (delta: -55.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:54,913 INFO L168 Benchmark]: Witness Printer took 7.62 ms. Allocated memory is still 180.4 MB. Free memory is still 114.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:37:54,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 121.6 MB. Free memory is still 97.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 673.73 ms. Allocated memory is still 121.6 MB. Free memory was 80.0 MB in the beginning and 88.4 MB in the end (delta: -8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 123.05 ms. Allocated memory is still 121.6 MB. Free memory was 88.4 MB in the beginning and 85.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 847.91 ms. Allocated memory is still 121.6 MB. Free memory was 85.3 MB in the beginning and 60.6 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6062.77 ms. Allocated memory was 121.6 MB in the beginning and 180.4 MB in the end (delta: 58.7 MB). Free memory was 60.1 MB in the beginning and 115.7 MB in the end (delta: -55.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. * Witness Printer took 7.62 ms. Allocated memory is still 180.4 MB. Free memory is still 114.7 MB. There was no memory consumed. 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 - UnprovableResult [Line: 569]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 569. Possible FailurePath: [L533] int i = 0; [L534] int y = 0; [L535] List a = (List) malloc(sizeof(struct node)); [L536] COND FALSE !(a == 0) VAL [a={-1:0}, i=0, y=0] [L537] List t; [L538] List p = a; VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L539] i < 10 && __VERIFIER_nondet_int() [L539] i < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, i < 10 && __VERIFIER_nondet_int()=0, p={-1:0}, y=0] [L539] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L547] y < 10 && __VERIFIER_nondet_int() [L547] y < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, p={-1:0}, y=0, y < 10 && __VERIFIER_nondet_int()=0] [L547] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L555] p->h = 3 VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L556] p->n = (void*)__VERIFIER_nondet_ulong() VAL [__VERIFIER_nondet_ulong()=0, a={-1:0}, i=0, p={-1:0}, y=0] [L557] i = 0 [L558] y = 0 [L559] p = a VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L560] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L560] COND FALSE !(p->h == 1) [L564] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L564] COND FALSE !(p->h == 2) [L568] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L568] COND TRUE p->h != 3 || (i + y) < 20 [L569] reach_error() VAL [a={-1:0}, i=0, p={-1:0}, y=0] - 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: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: 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: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: 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: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: 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: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: 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 10 procedures, 117 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 5920.3ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 32.8ms, AutomataDifference: 3731.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 578 SDtfs, 865 SDslu, 1008 SDs, 0 SdLazy, 2288 SolverSat, 143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2406.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 781.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=4, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 145.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 292 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 47.9ms SsaConstructionTime, 253.2ms SatisfiabilityAnalysisTime, 1269.9ms InterpolantComputationTime, 171 NumberOfCodeBlocks, 171 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 700 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 17/17 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 could not prove your program: unable to determine feasibility of some traces [2021-10-21 19:37:54,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:37:58,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:37:58,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:37:58,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:37:58,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:37:58,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:37:58,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:37:58,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:37:58,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:37:58,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:37:58,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:37:58,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:37:58,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:37:58,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:37:58,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:37:58,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:37:58,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:37:58,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:37:58,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:37:58,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:37:58,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:37:58,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:37:58,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:37:58,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:37:58,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:37:58,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:37:58,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:37:58,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:37:58,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:37:58,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:37:58,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:37:58,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:37:58,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:37:58,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:37:58,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:37:58,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:37:58,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:37:58,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:37:58,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:37:58,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:37:58,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:37:58,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-21 19:37:58,520 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:37:58,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:37:58,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:37:58,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:37:58,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:37:58,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:37:58,526 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:37:58,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:37:58,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:37:58,527 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:37:58,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:37:58,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:37:58,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:37:58,530 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:37:58,530 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:37:58,530 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:37:58,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:37:58,531 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:37:58,531 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:37:58,531 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:37:58,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:37:58,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:37:58,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:37:58,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:37:58,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:37:58,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:37:58,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:37:58,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:37:58,535 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:37:58,535 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:37:58,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:37:58,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:37:58,536 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8708d72a830c5b897b9a667c6367e709c7302fa81ab6e6c80a90a68a6807b5fb [2021-10-21 19:37:59,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:37:59,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:37:59,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:37:59,099 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:37:59,100 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:37:59,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-10-21 19:37:59,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data/397ed4105/ad7497704f0942888c23b1f1d19118e2/FLAGd698bbc5f [2021-10-21 19:37:59,953 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:37:59,957 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-10-21 19:37:59,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data/397ed4105/ad7497704f0942888c23b1f1d19118e2/FLAGd698bbc5f [2021-10-21 19:38:00,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/data/397ed4105/ad7497704f0942888c23b1f1d19118e2 [2021-10-21 19:38:00,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:38:00,210 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:38:00,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:38:00,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:38:00,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:38:00,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:00,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae77e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00, skipping insertion in model container [2021-10-21 19:38:00,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:00,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:38:00,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:38:00,785 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_e36f392d-4a39-4282-bc2e-af072952f4d2/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-10-21 19:38:00,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:38:00,830 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:38:00,885 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_e36f392d-4a39-4282-bc2e-af072952f4d2/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-10-21 19:38:00,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:38:00,939 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:38:00,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00 WrapperNode [2021-10-21 19:38:00,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:38:00,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:38:00,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:38:00,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:38:00,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:00,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:00,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:00,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:01,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:01,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:01,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:01,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:38:01,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:38:01,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:38:01,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:38:01,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (1/1) ... [2021-10-21 19:38:01,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:38:01,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:01,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:38:01,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:38:01,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:38:01,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:38:01,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:38:01,164 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:38:01,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:38:01,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:38:01,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:38:01,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:38:01,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:38:01,168 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:38:01,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:38:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:38:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:38:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:38:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:38:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:38:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:38:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:38:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2021-10-21 19:38:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:38:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:38:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:38:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:38:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:38:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:38:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:38:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:38:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:38:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:38:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:38:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:38:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:38:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:38:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:38:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:38:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:38:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:38:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:38:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:38:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:38:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:38:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:38:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:38:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:38:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:38:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:38:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:38:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:38:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:38:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:38:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:38:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:38:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:38:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:38:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:38:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:38:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:38:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:38:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:38:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:38:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:38:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:38:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:38:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:38:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:38:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:38:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:38:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:38:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:38:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:38:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:38:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:38:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:38:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:38:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:38:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:38:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:38:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:38:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:38:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:38:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:38:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:38:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:38:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:38:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:38:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:38:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:38:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:38:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:38:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:38:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:38:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:38:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:38:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:38:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:38:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:38:01,199 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:38:01,199 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:38:01,199 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:38:01,199 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:38:01,199 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:38:01,200 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:38:01,200 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:38:01,200 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:38:01,201 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:38:01,201 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:38:01,201 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:38:01,201 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:38:01,201 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:38:01,202 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:38:01,202 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:38:01,202 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:38:01,202 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:38:01,202 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:38:01,202 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:38:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:38:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:38:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:38:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:38:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:38:01,204 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:38:01,204 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:38:01,204 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:38:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:38:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:38:01,209 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:38:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:38:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:38:01,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 19:38:01,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:38:01,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:38:01,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 19:38:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:38:01,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:38:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:38:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:38:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:38:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 19:38:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 19:38:01,753 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:38:02,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:38:02,314 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-21 19:38:02,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:38:02 BoogieIcfgContainer [2021-10-21 19:38:02,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:38:02,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:38:02,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:38:02,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:38:02,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:38:00" (1/3) ... [2021-10-21 19:38:02,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ef081f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:38:02, skipping insertion in model container [2021-10-21 19:38:02,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:00" (2/3) ... [2021-10-21 19:38:02,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ef081f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:38:02, skipping insertion in model container [2021-10-21 19:38:02,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:38:02" (3/3) ... [2021-10-21 19:38:02,327 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext_2.i [2021-10-21 19:38:02,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:38:02,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-10-21 19:38:02,392 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:38:02,400 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 [2021-10-21 19:38:02,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-10-21 19:38:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:38:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:38:02,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:02,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:02,432 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:38:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1300184920, now seen corresponding path program 1 times [2021-10-21 19:38:02,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:38:02,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335711744] [2021-10-21 19:38:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:02,462 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:38:02,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:38:02,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:38:02,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:38:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:38:02,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:38:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:02,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:38:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:03,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:38:03,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335711744] [2021-10-21 19:38:03,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335711744] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:03,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:03,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 19:38:03,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250714540] [2021-10-21 19:38:03,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:38:03,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:38:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:38:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:38:03,039 INFO L87 Difference]: Start difference. First operand has 94 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:03,567 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-10-21 19:38:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:38:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:38:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:03,584 INFO L225 Difference]: With dead ends: 111 [2021-10-21 19:38:03,584 INFO L226 Difference]: Without dead ends: 103 [2021-10-21 19:38:03,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:38:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-21 19:38:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-10-21 19:38:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 79 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2021-10-21 19:38:03,656 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 10 [2021-10-21 19:38:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:03,657 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2021-10-21 19:38:03,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2021-10-21 19:38:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:38:03,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:03,659 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:03,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-21 19:38:03,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:38:03,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:38:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:03,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1300184921, now seen corresponding path program 1 times [2021-10-21 19:38:03,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:38:03,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616592120] [2021-10-21 19:38:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:03,879 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:38:03,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:38:03,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:38:03,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:38:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:04,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:38:04,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:04,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:38:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:04,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:38:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:04,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:38:04,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616592120] [2021-10-21 19:38:04,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616592120] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:04,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:04,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-21 19:38:04,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958956298] [2021-10-21 19:38:04,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:38:04,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:38:04,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:38:04,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:38:04,463 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:05,351 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2021-10-21 19:38:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:38:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:38:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:05,355 INFO L225 Difference]: With dead ends: 119 [2021-10-21 19:38:05,356 INFO L226 Difference]: Without dead ends: 119 [2021-10-21 19:38:05,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:38:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-21 19:38:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-10-21 19:38:05,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 97 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-10-21 19:38:05,369 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 10 [2021-10-21 19:38:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:05,370 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-10-21 19:38:05,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-10-21 19:38:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:38:05,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:05,372 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:05,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:05,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:38:05,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:38:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:05,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1952159409, now seen corresponding path program 1 times [2021-10-21 19:38:05,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:38:05,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714970986] [2021-10-21 19:38:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:05,600 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:38:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:38:05,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:38:05,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:38:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:38:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:05,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:38:05,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 19:38:05,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:38:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:05,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:38:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:06,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:38:06,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714970986] [2021-10-21 19:38:06,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714970986] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:06,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:06,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-21 19:38:06,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181960203] [2021-10-21 19:38:06,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:38:06,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:38:06,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:38:06,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:38:06,077 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:06,995 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2021-10-21 19:38:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:38:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 19:38:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:06,998 INFO L225 Difference]: With dead ends: 140 [2021-10-21 19:38:06,998 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:38:06,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:38:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:38:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2021-10-21 19:38:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 99 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-10-21 19:38:07,034 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 17 [2021-10-21 19:38:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:07,034 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-10-21 19:38:07,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-10-21 19:38:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:38:07,036 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:07,037 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:07,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:07,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:38:07,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:38:07,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:07,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1952159408, now seen corresponding path program 1 times [2021-10-21 19:38:07,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:38:07,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734611910] [2021-10-21 19:38:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:07,240 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:38:07,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:38:07,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:38:07,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:38:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:07,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:38:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:07,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:38:07,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:38:07,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-21 19:38:07,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-10-21 19:38:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-10-21 19:38:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:07,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:38:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:08,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:38:08,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734611910] [2021-10-21 19:38:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734611910] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:08,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-21 19:38:08,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745437026] [2021-10-21 19:38:08,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:38:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:38:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:38:08,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:38:08,117 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:10,179 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2021-10-21 19:38:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:38:10,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 19:38:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:10,183 INFO L225 Difference]: With dead ends: 145 [2021-10-21 19:38:10,184 INFO L226 Difference]: Without dead ends: 145 [2021-10-21 19:38:10,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 610.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:38:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-21 19:38:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2021-10-21 19:38:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-10-21 19:38:10,195 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 17 [2021-10-21 19:38:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:10,196 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-10-21 19:38:10,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-10-21 19:38:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:38:10,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:10,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:10,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:10,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:38:10,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:38:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2002045966, now seen corresponding path program 1 times [2021-10-21 19:38:10,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:38:10,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067816132] [2021-10-21 19:38:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:10,410 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:38:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:38:10,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:38:10,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 19:38:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:38:10,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:10,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:38:10,797 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:38:10,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-21 19:38:10,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:38:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:10,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:38:11,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 140 [2021-10-21 19:38:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:11,206 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:38:11,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067816132] [2021-10-21 19:38:11,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067816132] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:11,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:11,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-10-21 19:38:11,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083169080] [2021-10-21 19:38:11,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:38:11,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:38:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:38:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:38:11,214 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:12,189 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2021-10-21 19:38:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:38:12,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 19:38:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:12,192 INFO L225 Difference]: With dead ends: 192 [2021-10-21 19:38:12,192 INFO L226 Difference]: Without dead ends: 192 [2021-10-21 19:38:12,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:38:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-21 19:38:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 98. [2021-10-21 19:38:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 94 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-10-21 19:38:12,203 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 18 [2021-10-21 19:38:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:12,204 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-10-21 19:38:12,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-10-21 19:38:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:38:12,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:12,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:12,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:12,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:38:12,425 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:38:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1259494057, now seen corresponding path program 1 times [2021-10-21 19:38:12,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:38:12,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432785207] [2021-10-21 19:38:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:12,427 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:38:12,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:38:12,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:38:12,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 19:38:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:38:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:12,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:38:12,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-21 19:38:12,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:38:12,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-10-21 19:38:12,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-10-21 19:38:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:12,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:38:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:13,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:38:13,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432785207] [2021-10-21 19:38:13,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432785207] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:13,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:13,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-21 19:38:13,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764248053] [2021-10-21 19:38:13,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:38:13,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:38:13,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:38:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:38:13,255 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:15,106 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-10-21 19:38:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:38:15,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 19:38:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:15,108 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:38:15,108 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:38:15,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:38:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:38:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2021-10-21 19:38:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 84 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-10-21 19:38:15,117 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 18 [2021-10-21 19:38:15,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:15,117 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-10-21 19:38:15,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:15,118 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-10-21 19:38:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:38:15,119 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:15,119 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:15,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:15,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:38:15,334 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:38:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1259494058, now seen corresponding path program 1 times [2021-10-21 19:38:15,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:38:15,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396616254] [2021-10-21 19:38:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:15,336 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:38:15,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:38:15,337 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:38:15,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 19:38:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:15,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:38:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:38:15,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 19:38:15,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:38:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:15,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:38:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:15,824 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:38:15,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396616254] [2021-10-21 19:38:15,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396616254] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:15,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:15,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-21 19:38:15,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713204697] [2021-10-21 19:38:15,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:38:15,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:38:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:38:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:38:15,827 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:16,405 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2021-10-21 19:38:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:38:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 19:38:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:16,407 INFO L225 Difference]: With dead ends: 113 [2021-10-21 19:38:16,407 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 19:38:16,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:38:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 19:38:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2021-10-21 19:38:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 79 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-10-21 19:38:16,415 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 18 [2021-10-21 19:38:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:16,415 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-10-21 19:38:16,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-10-21 19:38:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:38:16,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:16,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:16,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:16,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:38:16,636 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-21 19:38:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:16,636 INFO L82 PathProgramCache]: Analyzing trace with hash 131545524, now seen corresponding path program 1 times [2021-10-21 19:38:16,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:38:16,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753565809] [2021-10-21 19:38:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:16,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:38:16,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:38:16,638 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:38:16,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 19:38:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:38:16,884 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:38:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:38:16,965 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 19:38:16,965 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:38:16,966 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:38:16,969 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:38:16,969 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:38:16,969 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:38:16,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:38:16,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 19:38:16,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 19:38:16,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 19:38:16,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 19:38:16,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 19:38:16,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-21 19:38:16,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-21 19:38:16,972 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 19:38:16,972 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 19:38:16,972 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 19:38:16,972 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-21 19:38:16,973 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-21 19:38:16,973 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-21 19:38:16,973 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-21 19:38:16,973 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-21 19:38:16,974 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-21 19:38:16,974 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-21 19:38:16,974 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-21 19:38:16,974 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-21 19:38:16,975 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-21 19:38:16,975 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-21 19:38:16,975 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-21 19:38:16,975 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-21 19:38:16,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-21 19:38:16,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-21 19:38:16,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-21 19:38:16,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:16,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:16,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:16,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:16,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:16,978 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:16,978 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:38:16,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:17,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:38:17,200 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:38:17,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:38:17 BoogieIcfgContainer [2021-10-21 19:38:17,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:38:17,230 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:38:17,230 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:38:17,231 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:38:17,235 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:38:02" (3/4) ... [2021-10-21 19:38:17,241 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:38:17,241 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:38:17,243 INFO L168 Benchmark]: Toolchain (without parser) took 17032.16 ms. Allocated memory was 56.6 MB in the beginning and 86.0 MB in the end (delta: 29.4 MB). Free memory was 34.0 MB in the beginning and 34.5 MB in the end (delta: -454.7 kB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:17,243 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 56.6 MB. Free memory is still 37.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:38:17,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.48 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 33.8 MB in the beginning and 46.9 MB in the end (delta: -13.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:17,245 INFO L168 Benchmark]: Boogie Preprocessor took 103.15 ms. Allocated memory is still 71.3 MB. Free memory was 46.9 MB in the beginning and 43.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:17,245 INFO L168 Benchmark]: RCFGBuilder took 1271.33 ms. Allocated memory is still 71.3 MB. Free memory was 43.6 MB in the beginning and 50.2 MB in the end (delta: -6.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:17,246 INFO L168 Benchmark]: TraceAbstraction took 14910.54 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 49.7 MB in the beginning and 35.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:17,247 INFO L168 Benchmark]: Witness Printer took 11.02 ms. Allocated memory is still 86.0 MB. Free memory was 35.2 MB in the beginning and 34.5 MB in the end (delta: 750.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:17,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 56.6 MB. Free memory is still 37.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 728.48 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 33.8 MB in the beginning and 46.9 MB in the end (delta: -13.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 103.15 ms. Allocated memory is still 71.3 MB. Free memory was 46.9 MB in the beginning and 43.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1271.33 ms. Allocated memory is still 71.3 MB. Free memory was 43.6 MB in the beginning and 50.2 MB in the end (delta: -6.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14910.54 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 49.7 MB in the beginning and 35.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. * Witness Printer took 11.02 ms. Allocated memory is still 86.0 MB. Free memory was 35.2 MB in the beginning and 34.5 MB in the end (delta: 750.8 kB). 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 - UnprovableResult [Line: 569]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 569. Possible FailurePath: [L533] int i = 0; [L534] int y = 0; [L535] List a = (List) malloc(sizeof(struct node)); [L536] COND FALSE !(a == 0) VAL [a={1:0}, i=0, y=0] [L537] List t; [L538] List p = a; VAL [a={1:0}, i=0, p={1:0}, y=0] [L539] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L547] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L555] p->h = 3 VAL [a={1:0}, i=0, p={1:0}, y=0] [L556] p->n = (void*)__VERIFIER_nondet_ulong() VAL [__VERIFIER_nondet_ulong()=0, a={1:0}, i=0, p={1:0}, y=0] [L557] i = 0 [L558] y = 0 [L559] p = a VAL [a={1:0}, i=0, p={1:0}, y=0] [L560] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L560] COND FALSE !(p->h == 1) [L564] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L564] COND FALSE !(p->h == 2) [L568] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L568] COND TRUE p->h != 3 || (i + y) < 20 [L569] reach_error() VAL [a={1:0}, i=0, p={1:0}, y=0] - 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: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: 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: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: 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: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: 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: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: 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 11 procedures, 119 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 14808.9ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 23.6ms, AutomataDifference: 7876.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 406 SDtfs, 1052 SDslu, 1045 SDs, 0 SdLazy, 1679 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5828.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1818.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=3, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 132.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 289 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 117.6ms SsaConstructionTime, 361.6ms SatisfiabilityAnalysisTime, 3103.7ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 202 ConstructedInterpolants, 1 QuantifiedInterpolants, 1010 SizeOfPredicates, 31 NumberOfNonLiveVariables, 613 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 14/14 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 could not prove your program: unable to determine feasibility of some traces [2021-10-21 19:38:17,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36f392d-4a39-4282-bc2e-af072952f4d2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...