./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL --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 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:43:59,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:43:59,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:43:59,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:43:59,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:43:59,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:43:59,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:43:59,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:43:59,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:43:59,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:43:59,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:43:59,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:43:59,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:43:59,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:43:59,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:43:59,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:43:59,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:43:59,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:43:59,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:43:59,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:43:59,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:43:59,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:43:59,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:43:59,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:43:59,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:43:59,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:43:59,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:43:59,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:43:59,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:43:59,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:43:59,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:43:59,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:43:59,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:43:59,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:43:59,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:43:59,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:43:59,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:43:59,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:43:59,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:43:59,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:43:59,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:43:59,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:43:59,503 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:43:59,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:43:59,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:43:59,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:43:59,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:43:59,505 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:43:59,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:43:59,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:43:59,507 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:43:59,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:43:59,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:43:59,508 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:43:59,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:43:59,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:43:59,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:43:59,508 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:43:59,509 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:43:59,509 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:43:59,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:43:59,509 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:43:59,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:43:59,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:43:59,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:43:59,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:43:59,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:43:59,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:43:59,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:43:59,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:43:59,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:43:59,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:43:59,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:43:59,513 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_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 [2021-11-19 04:43:59,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:44:00,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:44:00,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:44:00,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:44:00,010 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:44:00,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-11-19 04:44:00,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data/1f996e65d/55c5dc7a99a14c1f8765dd9d10cad148/FLAGab197e117 [2021-11-19 04:44:00,801 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:44:00,802 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-11-19 04:44:00,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data/1f996e65d/55c5dc7a99a14c1f8765dd9d10cad148/FLAGab197e117 [2021-11-19 04:44:01,049 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data/1f996e65d/55c5dc7a99a14c1f8765dd9d10cad148 [2021-11-19 04:44:01,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:44:01,054 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:44:01,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:44:01,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:44:01,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:44:01,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bb5ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01, skipping insertion in model container [2021-11-19 04:44:01,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:44:01,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:44:01,592 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-11-19 04:44:01,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-11-19 04:44:01,601 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-11-19 04:44:01,604 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-11-19 04:44:01,607 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-11-19 04:44:01,610 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-11-19 04:44:01,612 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-11-19 04:44:01,628 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:44:01,640 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:44:01,711 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-11-19 04:44:01,713 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-11-19 04:44:01,714 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-11-19 04:44:01,715 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-11-19 04:44:01,716 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-11-19 04:44:01,718 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-11-19 04:44:01,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-11-19 04:44:01,731 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:44:01,773 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:44:01,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01 WrapperNode [2021-11-19 04:44:01,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:44:01,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:44:01,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:44:01,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:44:01,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:44:01,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:44:01,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:44:01,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:44:01,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (1/1) ... [2021-11-19 04:44:01,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:44:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:44:01,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:44:01,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:44:02,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:44:02,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:44:02,025 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:44:02,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:44:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:44:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:44:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:44:02,027 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:44:02,027 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:44:02,027 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:44:02,027 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:44:02,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:44:02,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:44:02,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:44:02,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:44:02,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:44:02,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:44:02,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:44:02,029 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:44:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:44:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:44:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:44:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:44:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:44:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:44:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:44:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:44:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:44:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:44:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:44:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:44:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:44:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:44:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:44:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:44:02,036 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:44:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:44:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:44:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:44:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:44:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:44:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:44:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:44:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:44:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:44:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:44:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:44:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:44:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:44:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:44:02,041 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:44:02,041 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:44:02,043 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:44:02,043 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:44:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:44:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:44:02,046 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:44:02,046 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:44:02,046 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-19 04:44:02,047 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:44:02,047 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:44:02,047 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:44:02,047 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:44:02,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:44:02,048 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:44:02,048 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:44:02,048 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:44:02,049 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:44:02,049 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:44:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:44:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:44:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:44:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:44:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:44:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:44:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:44:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:44:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:44:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:44:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:44:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:44:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:44:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:44:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:44:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:44:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:44:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:44:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:44:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:44:02,054 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:44:02,054 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:44:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:44:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:44:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:44:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:44:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:44:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:44:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:44:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:44:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:44:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:44:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:44:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:44:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:44:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:44:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:44:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:44:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 04:44:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:44:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-19 04:44:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-19 04:44:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:44:02,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:44:02,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:44:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:44:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:44:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:44:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:44:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:44:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:44:02,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:44:02,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:44:02,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:44:02,376 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:44:02,392 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:44:02,936 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:44:02,945 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:44:02,945 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-19 04:44:02,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:44:02 BoogieIcfgContainer [2021-11-19 04:44:02,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:44:02,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:44:02,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:44:02,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:44:02,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:44:01" (1/3) ... [2021-11-19 04:44:02,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bea1209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:44:02, skipping insertion in model container [2021-11-19 04:44:02,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:01" (2/3) ... [2021-11-19 04:44:02,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bea1209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:44:02, skipping insertion in model container [2021-11-19 04:44:02,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:44:02" (3/3) ... [2021-11-19 04:44:02,959 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-11-19 04:44:02,966 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:44:02,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2021-11-19 04:44:03,025 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:44:03,033 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:44:03,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2021-11-19 04:44:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 89 states have (on average 2.202247191011236) internal successors, (196), 166 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:44:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:44:03,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:03,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:03,068 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:03,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1463572285, now seen corresponding path program 1 times [2021-11-19 04:44:03,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:03,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836191194] [2021-11-19 04:44:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:03,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:03,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:03,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:03,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836191194] [2021-11-19 04:44:03,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836191194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:03,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:03,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:44:03,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631553053] [2021-11-19 04:44:03,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:03,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:03,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:03,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:03,464 INFO L87 Difference]: Start difference. First operand has 171 states, 89 states have (on average 2.202247191011236) internal successors, (196), 166 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-19 04:44:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:03,859 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2021-11-19 04:44:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:44:03,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-11-19 04:44:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:03,882 INFO L225 Difference]: With dead ends: 197 [2021-11-19 04:44:03,882 INFO L226 Difference]: Without dead ends: 193 [2021-11-19 04:44:03,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:03,891 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 341 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:03,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 102 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:44:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-19 04:44:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 165. [2021-11-19 04:44:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 88 states have (on average 1.8977272727272727) internal successors, (167), 161 states have internal predecessors, (167), 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) [2021-11-19 04:44:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 170 transitions. [2021-11-19 04:44:04,013 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 170 transitions. Word has length 7 [2021-11-19 04:44:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:04,013 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 170 transitions. [2021-11-19 04:44:04,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-19 04:44:04,014 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 170 transitions. [2021-11-19 04:44:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:44:04,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:04,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:04,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:44:04,015 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:04,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1463572286, now seen corresponding path program 1 times [2021-11-19 04:44:04,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:04,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104805283] [2021-11-19 04:44:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:04,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:04,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:04,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:04,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104805283] [2021-11-19 04:44:04,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104805283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:04,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:04,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:44:04,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548098910] [2021-11-19 04:44:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:04,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:04,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:04,161 INFO L87 Difference]: Start difference. First operand 165 states and 170 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-19 04:44:04,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:04,333 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2021-11-19 04:44:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:44:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-11-19 04:44:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:04,336 INFO L225 Difference]: With dead ends: 162 [2021-11-19 04:44:04,337 INFO L226 Difference]: Without dead ends: 162 [2021-11-19 04:44:04,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:04,339 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 317 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:04,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 101 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:44:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-19 04:44:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-19 04:44:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 88 states have (on average 1.8636363636363635) internal successors, (164), 158 states have internal predecessors, (164), 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) [2021-11-19 04:44:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2021-11-19 04:44:04,354 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 7 [2021-11-19 04:44:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:04,355 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2021-11-19 04:44:04,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-19 04:44:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2021-11-19 04:44:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:44:04,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:04,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:04,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:44:04,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash 646742145, now seen corresponding path program 1 times [2021-11-19 04:44:04,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:04,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429046963] [2021-11-19 04:44:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:04,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:04,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:04,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429046963] [2021-11-19 04:44:04,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429046963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:04,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:04,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:44:04,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761325663] [2021-11-19 04:44:04,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:04,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:04,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:04,476 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-19 04:44:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:04,711 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2021-11-19 04:44:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:44:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-11-19 04:44:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:04,714 INFO L225 Difference]: With dead ends: 161 [2021-11-19 04:44:04,715 INFO L226 Difference]: Without dead ends: 161 [2021-11-19 04:44:04,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:04,717 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 292 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:04,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 101 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:44:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-19 04:44:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2021-11-19 04:44:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 90 states have (on average 1.788888888888889) internal successors, (161), 153 states have internal predecessors, (161), 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) [2021-11-19 04:44:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 164 transitions. [2021-11-19 04:44:04,731 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 164 transitions. Word has length 11 [2021-11-19 04:44:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:04,731 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 164 transitions. [2021-11-19 04:44:04,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-19 04:44:04,732 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 164 transitions. [2021-11-19 04:44:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:44:04,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:04,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:04,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:44:04,733 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:04,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:04,734 INFO L85 PathProgramCache]: Analyzing trace with hash 646742146, now seen corresponding path program 1 times [2021-11-19 04:44:04,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:04,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562945001] [2021-11-19 04:44:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:04,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:04,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:04,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:04,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562945001] [2021-11-19 04:44:04,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562945001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:04,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:04,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:44:04,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738370549] [2021-11-19 04:44:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:04,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:04,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:04,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:04,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:04,879 INFO L87 Difference]: Start difference. First operand 157 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-19 04:44:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:05,101 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2021-11-19 04:44:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:44:05,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-11-19 04:44:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:05,104 INFO L225 Difference]: With dead ends: 174 [2021-11-19 04:44:05,104 INFO L226 Difference]: Without dead ends: 174 [2021-11-19 04:44:05,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:05,106 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 303 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:05,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 101 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:44:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-19 04:44:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 161. [2021-11-19 04:44:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 97 states have (on average 1.7010309278350515) internal successors, (165), 157 states have internal predecessors, (165), 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) [2021-11-19 04:44:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 168 transitions. [2021-11-19 04:44:05,142 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 168 transitions. Word has length 11 [2021-11-19 04:44:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:05,143 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 168 transitions. [2021-11-19 04:44:05,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-19 04:44:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 168 transitions. [2021-11-19 04:44:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 04:44:05,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:05,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:05,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:44:05,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:05,146 INFO L85 PathProgramCache]: Analyzing trace with hash -955929302, now seen corresponding path program 1 times [2021-11-19 04:44:05,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:05,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451881029] [2021-11-19 04:44:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:05,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:05,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:05,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451881029] [2021-11-19 04:44:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451881029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:05,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:05,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:44:05,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508426692] [2021-11-19 04:44:05,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:05,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:44:05,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:05,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:44:05,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:05,339 INFO L87 Difference]: Start difference. First operand 161 states and 168 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-19 04:44:05,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:05,654 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2021-11-19 04:44:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:44:05,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-11-19 04:44:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:05,657 INFO L225 Difference]: With dead ends: 162 [2021-11-19 04:44:05,657 INFO L226 Difference]: Without dead ends: 162 [2021-11-19 04:44:05,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:44:05,659 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 365 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:05,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 81 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:44:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-19 04:44:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 148. [2021-11-19 04:44:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 99 states have (on average 1.5555555555555556) internal successors, (154), 144 states have internal predecessors, (154), 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) [2021-11-19 04:44:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 157 transitions. [2021-11-19 04:44:05,678 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 157 transitions. Word has length 17 [2021-11-19 04:44:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:05,679 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 157 transitions. [2021-11-19 04:44:05,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-19 04:44:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 157 transitions. [2021-11-19 04:44:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 04:44:05,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:05,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:05,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:44:05,681 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash -955929301, now seen corresponding path program 1 times [2021-11-19 04:44:05,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:05,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556497306] [2021-11-19 04:44:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:05,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:05,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:05,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:05,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556497306] [2021-11-19 04:44:05,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556497306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:05,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:05,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:44:05,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823939733] [2021-11-19 04:44:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:05,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:44:05,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:44:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:05,809 INFO L87 Difference]: Start difference. First operand 148 states and 157 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-19 04:44:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:06,247 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2021-11-19 04:44:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:44:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-11-19 04:44:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:06,249 INFO L225 Difference]: With dead ends: 187 [2021-11-19 04:44:06,249 INFO L226 Difference]: Without dead ends: 187 [2021-11-19 04:44:06,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:44:06,252 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 365 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:06,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 86 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:44:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-19 04:44:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 158. [2021-11-19 04:44:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 110 states have (on average 1.518181818181818) internal successors, (167), 154 states have internal predecessors, (167), 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) [2021-11-19 04:44:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2021-11-19 04:44:06,278 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 17 [2021-11-19 04:44:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:06,279 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2021-11-19 04:44:06,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-19 04:44:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2021-11-19 04:44:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:44:06,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:06,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:06,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:44:06,282 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:06,282 INFO L85 PathProgramCache]: Analyzing trace with hash 474995261, now seen corresponding path program 1 times [2021-11-19 04:44:06,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:06,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200539012] [2021-11-19 04:44:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:06,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:06,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:06,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:06,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200539012] [2021-11-19 04:44:06,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200539012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:06,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:06,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:44:06,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607459464] [2021-11-19 04:44:06,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:06,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:44:06,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:06,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:44:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:44:06,393 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-19 04:44:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:06,790 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2021-11-19 04:44:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:44:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 19 [2021-11-19 04:44:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:06,794 INFO L225 Difference]: With dead ends: 201 [2021-11-19 04:44:06,794 INFO L226 Difference]: Without dead ends: 201 [2021-11-19 04:44:06,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:44:06,796 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 496 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:06,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 93 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:44:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-19 04:44:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-11-19 04:44:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 109 states have (on average 1.4954128440366972) internal successors, (163), 152 states have internal predecessors, (163), 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) [2021-11-19 04:44:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2021-11-19 04:44:06,816 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 19 [2021-11-19 04:44:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:06,816 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2021-11-19 04:44:06,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-19 04:44:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2021-11-19 04:44:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 04:44:06,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:06,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:06,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:44:06,824 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:06,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1838316838, now seen corresponding path program 1 times [2021-11-19 04:44:06,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:06,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142649383] [2021-11-19 04:44:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:06,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:06,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:06,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:06,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142649383] [2021-11-19 04:44:06,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142649383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:06,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:06,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:44:06,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61365108] [2021-11-19 04:44:06,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:06,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:44:06,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:44:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:44:06,947 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-19 04:44:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:07,337 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2021-11-19 04:44:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:44:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 20 [2021-11-19 04:44:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:07,339 INFO L225 Difference]: With dead ends: 155 [2021-11-19 04:44:07,339 INFO L226 Difference]: Without dead ends: 155 [2021-11-19 04:44:07,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:44:07,341 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 141 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:07,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 145 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:44:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-19 04:44:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-19 04:44:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 151 states have internal predecessors, (161), 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) [2021-11-19 04:44:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 164 transitions. [2021-11-19 04:44:07,348 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 164 transitions. Word has length 20 [2021-11-19 04:44:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:07,349 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 164 transitions. [2021-11-19 04:44:07,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-19 04:44:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 164 transitions. [2021-11-19 04:44:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 04:44:07,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:07,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:07,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:44:07,351 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1838316839, now seen corresponding path program 1 times [2021-11-19 04:44:07,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:07,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949053634] [2021-11-19 04:44:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:07,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:07,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:07,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:07,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949053634] [2021-11-19 04:44:07,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949053634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:07,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:07,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:44:07,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75563934] [2021-11-19 04:44:07,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:07,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:44:07,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:07,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:44:07,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:44:07,441 INFO L87 Difference]: Start difference. First operand 155 states and 164 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-19 04:44:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:07,894 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2021-11-19 04:44:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:44:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 20 [2021-11-19 04:44:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:07,896 INFO L225 Difference]: With dead ends: 154 [2021-11-19 04:44:07,896 INFO L226 Difference]: Without dead ends: 154 [2021-11-19 04:44:07,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:44:07,897 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 135 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:07,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 146 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:44:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-19 04:44:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-19 04:44:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 109 states have (on average 1.4587155963302751) internal successors, (159), 150 states have internal predecessors, (159), 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) [2021-11-19 04:44:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2021-11-19 04:44:07,906 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 20 [2021-11-19 04:44:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:07,909 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2021-11-19 04:44:07,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-19 04:44:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2021-11-19 04:44:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 04:44:07,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:07,911 INFO L514 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] [2021-11-19 04:44:07,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:44:07,911 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1329344305, now seen corresponding path program 1 times [2021-11-19 04:44:07,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:07,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050587476] [2021-11-19 04:44:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:07,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:08,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:08,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:08,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050587476] [2021-11-19 04:44:08,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050587476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:08,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:08,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:44:08,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955603365] [2021-11-19 04:44:08,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:08,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:44:08,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:44:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:44:08,143 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-11-19 04:44:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:08,889 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2021-11-19 04:44:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:44:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 [2021-11-19 04:44:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:08,891 INFO L225 Difference]: With dead ends: 208 [2021-11-19 04:44:08,891 INFO L226 Difference]: Without dead ends: 208 [2021-11-19 04:44:08,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:44:08,893 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 633 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:08,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 106 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:44:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-19 04:44:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2021-11-19 04:44:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 114 states have (on average 1.4385964912280702) internal successors, (164), 155 states have internal predecessors, (164), 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) [2021-11-19 04:44:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2021-11-19 04:44:08,902 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 22 [2021-11-19 04:44:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:08,902 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2021-11-19 04:44:08,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-11-19 04:44:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2021-11-19 04:44:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:44:08,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:08,905 INFO L514 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] [2021-11-19 04:44:08,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:44:08,906 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash 942465896, now seen corresponding path program 1 times [2021-11-19 04:44:08,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:08,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547132153] [2021-11-19 04:44:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:08,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:09,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:09,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:09,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547132153] [2021-11-19 04:44:09,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547132153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:09,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:09,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:44:09,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792743392] [2021-11-19 04:44:09,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:09,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:44:09,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:44:09,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:44:09,132 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2021-11-19 04:44:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:09,757 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2021-11-19 04:44:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:44:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 [2021-11-19 04:44:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:09,759 INFO L225 Difference]: With dead ends: 158 [2021-11-19 04:44:09,759 INFO L226 Difference]: Without dead ends: 158 [2021-11-19 04:44:09,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:44:09,760 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 314 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:09,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 93 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:44:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-19 04:44:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-11-19 04:44:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 114 states have (on average 1.4298245614035088) internal successors, (163), 154 states have internal predecessors, (163), 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) [2021-11-19 04:44:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 166 transitions. [2021-11-19 04:44:09,771 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 166 transitions. Word has length 24 [2021-11-19 04:44:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:09,773 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 166 transitions. [2021-11-19 04:44:09,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2021-11-19 04:44:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 166 transitions. [2021-11-19 04:44:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:44:09,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:09,776 INFO L514 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] [2021-11-19 04:44:09,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:44:09,776 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash 942465897, now seen corresponding path program 1 times [2021-11-19 04:44:09,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:09,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646520951] [2021-11-19 04:44:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:09,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:09,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:09,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:09,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646520951] [2021-11-19 04:44:09,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646520951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:09,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:09,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:44:09,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10689516] [2021-11-19 04:44:09,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:09,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:44:09,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:09,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:44:09,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:44:09,992 INFO L87 Difference]: Start difference. First operand 158 states and 166 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-11-19 04:44:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:11,004 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2021-11-19 04:44:11,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:44:11,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 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 [2021-11-19 04:44:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:11,006 INFO L225 Difference]: With dead ends: 176 [2021-11-19 04:44:11,006 INFO L226 Difference]: Without dead ends: 176 [2021-11-19 04:44:11,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:44:11,008 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 372 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:11,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 100 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:44:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-19 04:44:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2021-11-19 04:44:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 124 states have (on average 1.3790322580645162) internal successors, (171), 158 states have internal predecessors, (171), 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) [2021-11-19 04:44:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 174 transitions. [2021-11-19 04:44:11,016 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 174 transitions. Word has length 24 [2021-11-19 04:44:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:11,016 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 174 transitions. [2021-11-19 04:44:11,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-11-19 04:44:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 174 transitions. [2021-11-19 04:44:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:44:11,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:11,018 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:11,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:44:11,019 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash 470516267, now seen corresponding path program 1 times [2021-11-19 04:44:11,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:11,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527650018] [2021-11-19 04:44:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:11,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:11,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:11,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:11,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527650018] [2021-11-19 04:44:11,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527650018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:44:11,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982611246] [2021-11-19 04:44:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:11,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:44:11,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:44:11,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:44:11,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:44:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:44:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:11,495 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 [2021-11-19 04:44:11,517 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 [2021-11-19 04:44:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:11,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-19 04:44:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:11,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-19 04:44:11,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:11,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:11,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:44:11,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-19 04:44:11,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:11,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:11,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-19 04:44:12,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:44:12,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-19 04:44:12,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:44:12,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-11-19 04:44:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:12,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:12,275 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 13 [2021-11-19 04:44:12,287 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 13 [2021-11-19 04:44:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:12,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982611246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:44:12,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:44:12,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 11 [2021-11-19 04:44:12,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016568776] [2021-11-19 04:44:12,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:44:12,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:44:12,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:12,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:44:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:44:12,324 INFO L87 Difference]: Start difference. First operand 162 states and 174 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:44:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:13,162 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2021-11-19 04:44:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:44:13,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-19 04:44:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:13,164 INFO L225 Difference]: With dead ends: 213 [2021-11-19 04:44:13,164 INFO L226 Difference]: Without dead ends: 213 [2021-11-19 04:44:13,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:44:13,166 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 552 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:13,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 114 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:44:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-19 04:44:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 169. [2021-11-19 04:44:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.366412213740458) internal successors, (179), 165 states have internal predecessors, (179), 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) [2021-11-19 04:44:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2021-11-19 04:44:13,172 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 182 transitions. Word has length 29 [2021-11-19 04:44:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:13,173 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 182 transitions. [2021-11-19 04:44:13,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:44:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 182 transitions. [2021-11-19 04:44:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:44:13,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:13,175 INFO L514 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, 1, 1, 1, 1, 1] [2021-11-19 04:44:13,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:13,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 04:44:13,397 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash 428498014, now seen corresponding path program 1 times [2021-11-19 04:44:13,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:13,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435341824] [2021-11-19 04:44:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:13,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:13,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:13,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:13,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435341824] [2021-11-19 04:44:13,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435341824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:13,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:13,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:44:13,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705724828] [2021-11-19 04:44:13,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:13,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:44:13,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:44:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:44:13,545 INFO L87 Difference]: Start difference. First operand 169 states and 182 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-19 04:44:13,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:13,948 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2021-11-19 04:44:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:44:13,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 29 [2021-11-19 04:44:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:13,950 INFO L225 Difference]: With dead ends: 173 [2021-11-19 04:44:13,950 INFO L226 Difference]: Without dead ends: 173 [2021-11-19 04:44:13,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:44:13,951 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 152 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:13,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 136 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:44:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-19 04:44:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2021-11-19 04:44:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 130 states have (on average 1.353846153846154) internal successors, (176), 164 states have internal predecessors, (176), 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) [2021-11-19 04:44:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 179 transitions. [2021-11-19 04:44:13,962 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 179 transitions. Word has length 29 [2021-11-19 04:44:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:13,963 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 179 transitions. [2021-11-19 04:44:13,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-19 04:44:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 179 transitions. [2021-11-19 04:44:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:44:13,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:13,966 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:13,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:44:13,967 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr40ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1019922444, now seen corresponding path program 1 times [2021-11-19 04:44:13,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:13,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114154123] [2021-11-19 04:44:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:13,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:14,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:14,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:14,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114154123] [2021-11-19 04:44:14,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114154123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:14,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:14,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:44:14,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952060893] [2021-11-19 04:44:14,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:14,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:44:14,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:14,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:44:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:14,046 INFO L87 Difference]: Start difference. First operand 168 states and 179 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-19 04:44:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:14,459 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2021-11-19 04:44:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:44:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 30 [2021-11-19 04:44:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:14,461 INFO L225 Difference]: With dead ends: 170 [2021-11-19 04:44:14,462 INFO L226 Difference]: Without dead ends: 170 [2021-11-19 04:44:14,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:44:14,463 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 142 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:14,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 135 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:44:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-19 04:44:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2021-11-19 04:44:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 129 states have (on average 1.3410852713178294) internal successors, (173), 162 states have internal predecessors, (173), 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) [2021-11-19 04:44:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2021-11-19 04:44:14,486 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 30 [2021-11-19 04:44:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:14,487 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2021-11-19 04:44:14,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-19 04:44:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2021-11-19 04:44:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:44:14,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:14,488 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:14,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:44:14,489 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:14,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1154646554, now seen corresponding path program 1 times [2021-11-19 04:44:14,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:14,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345977123] [2021-11-19 04:44:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:14,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:14,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:14,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:14,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345977123] [2021-11-19 04:44:14,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345977123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:14,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:14,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:44:14,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817068371] [2021-11-19 04:44:14,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:14,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:44:14,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:44:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:44:14,636 INFO L87 Difference]: Start difference. First operand 166 states and 176 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-19 04:44:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:15,087 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2021-11-19 04:44:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:44:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 32 [2021-11-19 04:44:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:15,089 INFO L225 Difference]: With dead ends: 165 [2021-11-19 04:44:15,089 INFO L226 Difference]: Without dead ends: 165 [2021-11-19 04:44:15,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:44:15,090 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 125 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:15,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 137 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:44:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-19 04:44:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-19 04:44:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 129 states have (on average 1.3333333333333333) internal successors, (172), 161 states have internal predecessors, (172), 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) [2021-11-19 04:44:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2021-11-19 04:44:15,099 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 32 [2021-11-19 04:44:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:15,101 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2021-11-19 04:44:15,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-19 04:44:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2021-11-19 04:44:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:44:15,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:15,103 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:15,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:44:15,104 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1154646553, now seen corresponding path program 1 times [2021-11-19 04:44:15,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:15,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101191377] [2021-11-19 04:44:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:15,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:15,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:15,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:15,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101191377] [2021-11-19 04:44:15,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101191377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:15,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:15,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:44:15,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921844253] [2021-11-19 04:44:15,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:15,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:44:15,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:44:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:44:15,194 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-19 04:44:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:15,558 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2021-11-19 04:44:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:44:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 32 [2021-11-19 04:44:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:15,560 INFO L225 Difference]: With dead ends: 164 [2021-11-19 04:44:15,560 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 04:44:15,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:44:15,561 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 124 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:15,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 136 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:44:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 04:44:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-19 04:44:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 129 states have (on average 1.3255813953488371) internal successors, (171), 160 states have internal predecessors, (171), 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) [2021-11-19 04:44:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 174 transitions. [2021-11-19 04:44:15,568 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 174 transitions. Word has length 32 [2021-11-19 04:44:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:15,568 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 174 transitions. [2021-11-19 04:44:15,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-19 04:44:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 174 transitions. [2021-11-19 04:44:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:44:15,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:15,572 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:15,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:44:15,572 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1914894277, now seen corresponding path program 1 times [2021-11-19 04:44:15,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:15,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495635900] [2021-11-19 04:44:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:15,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:15,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:15,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:15,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495635900] [2021-11-19 04:44:15,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495635900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:15,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:15,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:44:15,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976423978] [2021-11-19 04:44:15,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:15,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:44:15,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:15,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:44:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:15,676 INFO L87 Difference]: Start difference. First operand 164 states and 174 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-11-19 04:44:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:15,997 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2021-11-19 04:44:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:44:15,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 33 [2021-11-19 04:44:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:15,999 INFO L225 Difference]: With dead ends: 163 [2021-11-19 04:44:15,999 INFO L226 Difference]: Without dead ends: 163 [2021-11-19 04:44:15,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:44:16,000 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 129 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:16,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 127 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:44:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-19 04:44:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-11-19 04:44:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 128 states have (on average 1.3125) internal successors, (168), 158 states have internal predecessors, (168), 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) [2021-11-19 04:44:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2021-11-19 04:44:16,007 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 33 [2021-11-19 04:44:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:16,007 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2021-11-19 04:44:16,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-11-19 04:44:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2021-11-19 04:44:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:44:16,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:16,009 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:16,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:44:16,009 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr74ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1259434580, now seen corresponding path program 1 times [2021-11-19 04:44:16,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:16,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438394147] [2021-11-19 04:44:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:16,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:44:16,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:16,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438394147] [2021-11-19 04:44:16,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438394147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:16,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:16,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:44:16,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788115462] [2021-11-19 04:44:16,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:16,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:16,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:16,062 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-19 04:44:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:16,160 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-11-19 04:44:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:44:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2021-11-19 04:44:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:16,162 INFO L225 Difference]: With dead ends: 164 [2021-11-19 04:44:16,163 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 04:44:16,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:16,164 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 202 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:16,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 115 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:44:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 04:44:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-19 04:44:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 130 states have (on average 1.3076923076923077) internal successors, (170), 160 states have internal predecessors, (170), 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) [2021-11-19 04:44:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 173 transitions. [2021-11-19 04:44:16,171 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 173 transitions. Word has length 35 [2021-11-19 04:44:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:16,172 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 173 transitions. [2021-11-19 04:44:16,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-19 04:44:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 173 transitions. [2021-11-19 04:44:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:44:16,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:16,173 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:16,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:44:16,174 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1967527785, now seen corresponding path program 1 times [2021-11-19 04:44:16,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:16,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478966643] [2021-11-19 04:44:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:16,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:16,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:16,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:16,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478966643] [2021-11-19 04:44:16,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478966643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:16,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:16,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-19 04:44:16,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272506880] [2021-11-19 04:44:16,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:16,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:44:16,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:44:16,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:44:16,441 INFO L87 Difference]: Start difference. First operand 164 states and 173 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-11-19 04:44:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:17,328 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2021-11-19 04:44:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 04:44:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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 35 [2021-11-19 04:44:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:17,331 INFO L225 Difference]: With dead ends: 178 [2021-11-19 04:44:17,331 INFO L226 Difference]: Without dead ends: 178 [2021-11-19 04:44:17,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:44:17,332 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 438 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:17,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 92 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:44:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-19 04:44:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2021-11-19 04:44:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 130 states have (on average 1.3) internal successors, (169), 160 states have internal predecessors, (169), 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) [2021-11-19 04:44:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2021-11-19 04:44:17,343 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 35 [2021-11-19 04:44:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:17,343 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2021-11-19 04:44:17,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-11-19 04:44:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2021-11-19 04:44:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:44:17,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:17,345 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:17,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:44:17,345 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1254504805, now seen corresponding path program 1 times [2021-11-19 04:44:17,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:17,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109820807] [2021-11-19 04:44:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:17,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:17,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:17,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:17,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109820807] [2021-11-19 04:44:17,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109820807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:17,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:17,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:44:17,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41739095] [2021-11-19 04:44:17,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:17,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:44:17,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:44:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:44:17,514 INFO L87 Difference]: Start difference. First operand 164 states and 172 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-11-19 04:44:18,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:18,010 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-11-19 04:44:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:44:18,011 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 36 [2021-11-19 04:44:18,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:18,012 INFO L225 Difference]: With dead ends: 164 [2021-11-19 04:44:18,013 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 04:44:18,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:44:18,014 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 177 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:18,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 111 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:44:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 04:44:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-11-19 04:44:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 130 states have (on average 1.2923076923076924) internal successors, (168), 159 states have internal predecessors, (168), 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) [2021-11-19 04:44:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2021-11-19 04:44:18,021 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 36 [2021-11-19 04:44:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:18,021 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2021-11-19 04:44:18,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-11-19 04:44:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2021-11-19 04:44:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:44:18,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:18,023 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:18,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 04:44:18,023 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:18,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:18,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1254504804, now seen corresponding path program 1 times [2021-11-19 04:44:18,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:18,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683182387] [2021-11-19 04:44:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:18,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:18,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:18,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:18,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683182387] [2021-11-19 04:44:18,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683182387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:18,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:18,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:44:18,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436496377] [2021-11-19 04:44:18,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:18,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:44:18,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:44:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:44:18,281 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-11-19 04:44:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:19,047 INFO L93 Difference]: Finished difference Result 159 states and 167 transitions. [2021-11-19 04:44:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:44:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 36 [2021-11-19 04:44:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:19,052 INFO L225 Difference]: With dead ends: 159 [2021-11-19 04:44:19,052 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 04:44:19,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:44:19,053 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 180 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:19,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 130 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:44:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 04:44:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2021-11-19 04:44:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 143 states have internal predecessors, (151), 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) [2021-11-19 04:44:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 154 transitions. [2021-11-19 04:44:19,060 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 154 transitions. Word has length 36 [2021-11-19 04:44:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:19,060 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 154 transitions. [2021-11-19 04:44:19,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-11-19 04:44:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 154 transitions. [2021-11-19 04:44:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:44:19,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:19,062 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:19,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 04:44:19,062 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr66REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:19,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2131891079, now seen corresponding path program 1 times [2021-11-19 04:44:19,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:19,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887682772] [2021-11-19 04:44:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:19,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:19,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:19,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:19,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887682772] [2021-11-19 04:44:19,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887682772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:44:19,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831021658] [2021-11-19 04:44:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:19,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:44:19,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:44:19,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:44:19,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:44:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:19,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:44:19,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:19,381 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 [2021-11-19 04:44:19,449 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 19 treesize of output 7 [2021-11-19 04:44:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:44:19,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:44:19,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831021658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:19,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:44:19,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2021-11-19 04:44:19,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725568417] [2021-11-19 04:44:19,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:19,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:19,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:44:19,475 INFO L87 Difference]: Start difference. First operand 147 states and 154 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2021-11-19 04:44:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:19,572 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2021-11-19 04:44:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:44:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 37 [2021-11-19 04:44:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:19,574 INFO L225 Difference]: With dead ends: 156 [2021-11-19 04:44:19,575 INFO L226 Difference]: Without dead ends: 156 [2021-11-19 04:44:19,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:44:19,577 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 6 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:19,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 280 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:44:19,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-19 04:44:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2021-11-19 04:44:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 124 states have (on average 1.2419354838709677) internal successors, (154), 146 states have internal predecessors, (154), 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) [2021-11-19 04:44:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 157 transitions. [2021-11-19 04:44:19,584 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 157 transitions. Word has length 37 [2021-11-19 04:44:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:19,585 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 157 transitions. [2021-11-19 04:44:19,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2021-11-19 04:44:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 157 transitions. [2021-11-19 04:44:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:44:19,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:19,586 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:19,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:19,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 04:44:19,801 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr59REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1019054532, now seen corresponding path program 1 times [2021-11-19 04:44:19,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:19,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857619064] [2021-11-19 04:44:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:19,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:20,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:44:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:20,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:20,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857619064] [2021-11-19 04:44:20,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857619064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:44:20,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527807072] [2021-11-19 04:44:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:20,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:44:20,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:44:20,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:44:20,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:44:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:44:20,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:20,203 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 [2021-11-19 04:44:20,211 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 [2021-11-19 04:44:20,236 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-19 04:44:20,251 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 04:44:20,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 33 [2021-11-19 04:44:20,269 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-19 04:44:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:20,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-11-19 04:44:20,351 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-19 04:44:20,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-11-19 04:44:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:44:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-19 04:44:20,675 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 04:44:20,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-19 04:44:20,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 04:44:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-11-19 04:44:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:44:20,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:44:20,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527807072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:44:20,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:44:20,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 9 [2021-11-19 04:44:20,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159413403] [2021-11-19 04:44:20,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:44:20,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:44:20,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:44:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:44:20,982 INFO L87 Difference]: Start difference. First operand 150 states and 157 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:44:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:21,688 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2021-11-19 04:44:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:44:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-19 04:44:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:21,690 INFO L225 Difference]: With dead ends: 160 [2021-11-19 04:44:21,690 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 04:44:21,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:44:21,691 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 171 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:21,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 124 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:44:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 04:44:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-11-19 04:44:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 152 states have internal predecessors, (160), 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) [2021-11-19 04:44:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2021-11-19 04:44:21,697 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 38 [2021-11-19 04:44:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:21,698 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2021-11-19 04:44:21,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:44:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2021-11-19 04:44:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:44:21,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:21,699 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:21,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:21,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 04:44:21,916 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr76ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1525919079, now seen corresponding path program 1 times [2021-11-19 04:44:21,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:21,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586080319] [2021-11-19 04:44:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:21,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:44:21,941 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 04:44:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:44:21,999 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 04:44:22,000 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 04:44:22,001 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr76ENSURES_VIOLATIONMEMORY_LEAK (76 of 77 remaining) [2021-11-19 04:44:22,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (75 of 77 remaining) [2021-11-19 04:44:22,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (74 of 77 remaining) [2021-11-19 04:44:22,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (73 of 77 remaining) [2021-11-19 04:44:22,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (72 of 77 remaining) [2021-11-19 04:44:22,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (71 of 77 remaining) [2021-11-19 04:44:22,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (70 of 77 remaining) [2021-11-19 04:44:22,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (69 of 77 remaining) [2021-11-19 04:44:22,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (68 of 77 remaining) [2021-11-19 04:44:22,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (67 of 77 remaining) [2021-11-19 04:44:22,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (66 of 77 remaining) [2021-11-19 04:44:22,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (65 of 77 remaining) [2021-11-19 04:44:22,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (64 of 77 remaining) [2021-11-19 04:44:22,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (63 of 77 remaining) [2021-11-19 04:44:22,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (62 of 77 remaining) [2021-11-19 04:44:22,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (61 of 77 remaining) [2021-11-19 04:44:22,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (60 of 77 remaining) [2021-11-19 04:44:22,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (59 of 77 remaining) [2021-11-19 04:44:22,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (58 of 77 remaining) [2021-11-19 04:44:22,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (57 of 77 remaining) [2021-11-19 04:44:22,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (56 of 77 remaining) [2021-11-19 04:44:22,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (55 of 77 remaining) [2021-11-19 04:44:22,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (54 of 77 remaining) [2021-11-19 04:44:22,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (53 of 77 remaining) [2021-11-19 04:44:22,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (52 of 77 remaining) [2021-11-19 04:44:22,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (51 of 77 remaining) [2021-11-19 04:44:22,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (50 of 77 remaining) [2021-11-19 04:44:22,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION (49 of 77 remaining) [2021-11-19 04:44:22,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (48 of 77 remaining) [2021-11-19 04:44:22,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (47 of 77 remaining) [2021-11-19 04:44:22,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION (46 of 77 remaining) [2021-11-19 04:44:22,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION (45 of 77 remaining) [2021-11-19 04:44:22,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION (44 of 77 remaining) [2021-11-19 04:44:22,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION (43 of 77 remaining) [2021-11-19 04:44:22,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION (42 of 77 remaining) [2021-11-19 04:44:22,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION (41 of 77 remaining) [2021-11-19 04:44:22,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION (40 of 77 remaining) [2021-11-19 04:44:22,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION (39 of 77 remaining) [2021-11-19 04:44:22,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION (38 of 77 remaining) [2021-11-19 04:44:22,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION (37 of 77 remaining) [2021-11-19 04:44:22,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION (36 of 77 remaining) [2021-11-19 04:44:22,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ASSERT_VIOLATIONMEMORY_LEAK (35 of 77 remaining) [2021-11-19 04:44:22,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION (34 of 77 remaining) [2021-11-19 04:44:22,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION (33 of 77 remaining) [2021-11-19 04:44:22,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_LEAK (32 of 77 remaining) [2021-11-19 04:44:22,014 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ASSERT_VIOLATIONMEMORY_LEAK (31 of 77 remaining) [2021-11-19 04:44:22,014 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45ASSERT_VIOLATIONMEMORY_LEAK (30 of 77 remaining) [2021-11-19 04:44:22,014 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION (29 of 77 remaining) [2021-11-19 04:44:22,014 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION (28 of 77 remaining) [2021-11-19 04:44:22,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48ASSERT_VIOLATIONMEMORY_LEAK (27 of 77 remaining) [2021-11-19 04:44:22,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION (26 of 77 remaining) [2021-11-19 04:44:22,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50REQUIRES_VIOLATION (25 of 77 remaining) [2021-11-19 04:44:22,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION (24 of 77 remaining) [2021-11-19 04:44:22,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION (23 of 77 remaining) [2021-11-19 04:44:22,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53ASSERT_VIOLATIONMEMORY_LEAK (22 of 77 remaining) [2021-11-19 04:44:22,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION (21 of 77 remaining) [2021-11-19 04:44:22,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55REQUIRES_VIOLATION (20 of 77 remaining) [2021-11-19 04:44:22,017 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_LEAK (19 of 77 remaining) [2021-11-19 04:44:22,018 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57REQUIRES_VIOLATION (18 of 77 remaining) [2021-11-19 04:44:22,018 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58REQUIRES_VIOLATION (17 of 77 remaining) [2021-11-19 04:44:22,018 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59REQUIRES_VIOLATION (16 of 77 remaining) [2021-11-19 04:44:22,018 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60REQUIRES_VIOLATION (15 of 77 remaining) [2021-11-19 04:44:22,020 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr61REQUIRES_VIOLATION (14 of 77 remaining) [2021-11-19 04:44:22,020 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr62REQUIRES_VIOLATION (13 of 77 remaining) [2021-11-19 04:44:22,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr63ASSERT_VIOLATIONMEMORY_FREE (12 of 77 remaining) [2021-11-19 04:44:22,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr64ASSERT_VIOLATIONMEMORY_FREE (11 of 77 remaining) [2021-11-19 04:44:22,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr65ASSERT_VIOLATIONMEMORY_FREE (10 of 77 remaining) [2021-11-19 04:44:22,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr66REQUIRES_VIOLATION (9 of 77 remaining) [2021-11-19 04:44:22,022 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr67REQUIRES_VIOLATION (8 of 77 remaining) [2021-11-19 04:44:22,022 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr68ASSERT_VIOLATIONMEMORY_FREE (7 of 77 remaining) [2021-11-19 04:44:22,022 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr69ASSERT_VIOLATIONMEMORY_FREE (6 of 77 remaining) [2021-11-19 04:44:22,022 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr70ASSERT_VIOLATIONMEMORY_FREE (5 of 77 remaining) [2021-11-19 04:44:22,023 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr71REQUIRES_VIOLATION (4 of 77 remaining) [2021-11-19 04:44:22,023 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr72REQUIRES_VIOLATION (3 of 77 remaining) [2021-11-19 04:44:22,023 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr73ASSERT_VIOLATIONMEMORY_FREE (2 of 77 remaining) [2021-11-19 04:44:22,023 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr74ASSERT_VIOLATIONMEMORY_FREE (1 of 77 remaining) [2021-11-19 04:44:22,024 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr75ASSERT_VIOLATIONMEMORY_FREE (0 of 77 remaining) [2021-11-19 04:44:22,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:44:22,028 INFO L732 BasicCegarLoop]: Path program 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, 1] [2021-11-19 04:44:22,033 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 04:44:22,056 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-19 04:44:22,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:44:22 BoogieIcfgContainer [2021-11-19 04:44:22,077 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 04:44:22,077 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 04:44:22,078 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 04:44:22,078 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 04:44:22,079 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:44:02" (3/4) ... [2021-11-19 04:44:22,083 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 04:44:22,083 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 04:44:22,084 INFO L158 Benchmark]: Toolchain (without parser) took 21029.90ms. Allocated memory was 92.3MB in the beginning and 195.0MB in the end (delta: 102.8MB). Free memory was 53.9MB in the beginning and 138.4MB in the end (delta: -84.5MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. [2021-11-19 04:44:22,084 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 92.3MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:44:22,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 718.89ms. Allocated memory is still 92.3MB. Free memory was 53.7MB in the beginning and 60.5MB in the end (delta: -6.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 04:44:22,085 INFO L158 Benchmark]: Boogie Preprocessor took 136.32ms. Allocated memory is still 92.3MB. Free memory was 60.5MB in the beginning and 57.5MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 04:44:22,086 INFO L158 Benchmark]: RCFGBuilder took 1035.78ms. Allocated memory is still 92.3MB. Free memory was 57.5MB in the beginning and 63.0MB in the end (delta: -5.5MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2021-11-19 04:44:22,086 INFO L158 Benchmark]: TraceAbstraction took 19126.33ms. Allocated memory was 92.3MB in the beginning and 195.0MB in the end (delta: 102.8MB). Free memory was 62.5MB in the beginning and 138.4MB in the end (delta: -75.9MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. [2021-11-19 04:44:22,086 INFO L158 Benchmark]: Witness Printer took 5.68ms. Allocated memory is still 195.0MB. Free memory is still 138.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:44:22,088 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 92.3MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 718.89ms. Allocated memory is still 92.3MB. Free memory was 53.7MB in the beginning and 60.5MB in the end (delta: -6.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 136.32ms. Allocated memory is still 92.3MB. Free memory was 60.5MB in the beginning and 57.5MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1035.78ms. Allocated memory is still 92.3MB. Free memory was 57.5MB in the beginning and 63.0MB in the end (delta: -5.5MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. * TraceAbstraction took 19126.33ms. Allocated memory was 92.3MB in the beginning and 195.0MB in the end (delta: 102.8MB). Free memory was 62.5MB in the beginning and 138.4MB in the end (delta: -75.9MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. * Witness Printer took 5.68ms. Allocated memory is still 195.0MB. Free memory is still 138.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 996]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 996. Possible FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) VAL [null={-1:0}] [L1000] null->prev = ((void*)0) VAL [null={-1:0}] [L1001] null->colour = BLACK VAL [null={-1:0}] [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null VAL [list={-2:0}, null={-1:0}] [L1005] list->prev = null VAL [list={-2:0}, null={-1:0}] [L1006] list->colour = BLACK VAL [list={-2:0}, null={-1:0}] [L1008] struct TSLL* end = list; VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1042] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1045] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1045] COND FALSE !(RED == end->colour) [L1052] EXPR end->next VAL [end={-2:0}, end->next={-1:0}, list={-2:0}, null={-1:0}] [L1052] end = end->next [L1043] COND FALSE !(null != end) VAL [end={-1:0}, list={-2:0}, null={-1:0}] [L1056] COND TRUE null != list VAL [end={-1:0}, list={-2:0}, null={-1:0}] [L1058] EXPR list->colour VAL [end={-1:0}, list={-2:0}, list->colour=1, null={-1:0}] [L1058] COND FALSE !(RED == list->colour) [L1067] EXPR list->next VAL [end={-1:0}, list={-2:0}, list->next={-1:0}, null={-1:0}] [L1067] end = list->next [L1068] free(list) VAL [end={-1:0}, list={-2:0}, null={-1:0}] [L1068] free(list) VAL [end={-1:0}, list={-2:0}, null={-1:0}] [L1068] free(list) [L1069] list = end VAL [end={-1:0}, list={-1:0}, null={-1:0}] [L1056] COND FALSE !(null != list) VAL [end={-1:0}, list={-1:0}, null={-1:0}] [L1073] return 0; VAL [\result=0, end={-1:0}, list={-1:0}, null={-1:0}] - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1060]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1060]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1067]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1067]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 174 locations, 77 error locations. Started 1 CEGAR loops. OverallTime: 19.0s, OverallIterations: 25, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6472 SdHoareTripleChecker+Valid, 8.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6472 mSDsluCounter, 2892 SdHoareTripleChecker+Invalid, 7.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 526 mSDsCounter, 426 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8254 IncrementalHoareTripleChecker+Invalid, 8680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 426 mSolverCounterUnsat, 2366 mSDtfsCounter, 8254 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 475 GetRequests, 230 SyntacticMatches, 9 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=0, InterpolantAutomatonStates: 188, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 24 MinimizatonAttempts, 287 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 744 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 743 ConstructedInterpolants, 0 QuantifiedInterpolants, 5607 SizeOfPredicates, 26 NumberOfNonLiveVariables, 500 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 29 InterpolantComputations, 22 PerfectInterpolantSequences, 10/18 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 [2021-11-19 04:44:22,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL --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 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:44:25,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:44:25,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:44:25,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:44:25,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:44:25,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:44:25,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:44:25,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:44:25,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:44:25,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:44:25,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:44:25,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:44:25,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:44:25,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:44:25,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:44:25,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:44:25,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:44:25,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:44:25,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:44:25,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:44:25,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:44:25,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:44:25,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:44:25,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:44:25,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:44:25,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:44:25,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:44:25,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:44:25,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:44:25,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:44:25,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:44:25,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:44:25,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:44:25,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:44:25,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:44:25,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:44:25,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:44:25,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:44:25,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:44:25,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:44:25,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:44:25,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-19 04:44:25,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:44:25,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:44:25,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:44:25,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:44:25,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:44:25,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:44:25,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:44:25,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:44:25,417 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:44:25,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:44:25,419 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:44:25,419 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:44:25,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:44:25,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:44:25,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:44:25,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:44:25,421 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:44:25,422 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:44:25,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:44:25,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:44:25,422 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 04:44:25,423 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 04:44:25,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:44:25,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:44:25,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:44:25,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:44:25,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:44:25,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:44:25,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:44:25,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:44:25,426 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-19 04:44:25,426 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 04:44:25,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:44:25,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 04:44:25,427 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_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 [2021-11-19 04:44:25,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:44:26,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:44:26,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:44:26,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:44:26,020 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:44:26,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-11-19 04:44:26,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data/43c40f41b/cfe1e909e2944719a018e4be44c5299f/FLAGd5a014a50 [2021-11-19 04:44:26,994 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:44:26,995 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-11-19 04:44:27,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data/43c40f41b/cfe1e909e2944719a018e4be44c5299f/FLAGd5a014a50 [2021-11-19 04:44:27,186 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/data/43c40f41b/cfe1e909e2944719a018e4be44c5299f [2021-11-19 04:44:27,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:44:27,200 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:44:27,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:44:27,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:44:27,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:44:27,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:27,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3230a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27, skipping insertion in model container [2021-11-19 04:44:27,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:27,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:44:27,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:44:27,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-11-19 04:44:27,729 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-11-19 04:44:27,731 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-11-19 04:44:27,732 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-11-19 04:44:27,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-11-19 04:44:27,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-11-19 04:44:27,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-11-19 04:44:27,745 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:44:27,761 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:44:27,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-11-19 04:44:27,816 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-11-19 04:44:27,817 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-11-19 04:44:27,819 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-11-19 04:44:27,823 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-11-19 04:44:27,831 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-11-19 04:44:27,833 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-11-19 04:44:27,854 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:44:27,907 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:44:27,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27 WrapperNode [2021-11-19 04:44:27,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:44:27,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:44:27,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:44:27,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:44:27,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:27,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:27,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:27,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:28,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:28,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:28,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:28,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:44:28,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:44:28,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:44:28,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:44:28,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (1/1) ... [2021-11-19 04:44:28,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:44:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:44:28,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:44:28,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:44:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:44:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:44:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-19 04:44:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:44:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:44:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:44:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:44:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:44:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:44:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:44:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:44:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:44:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:44:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:44:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:44:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:44:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:44:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:44:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:44:28,138 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:44:28,138 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:44:28,138 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:44:28,138 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:44:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:44:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:44:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:44:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:44:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:44:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:44:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:44:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:44:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:44:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:44:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:44:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:44:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:44:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:44:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:44:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:44:28,147 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:44:28,147 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:44:28,148 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:44:28,148 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:44:28,149 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:44:28,149 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:44:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:44:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:44:28,151 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:44:28,151 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:44:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:44:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:44:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:44:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:44:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:44:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:44:28,163 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:44:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:44:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:44:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:44:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-19 04:44:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:44:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:44:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:44:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:44:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:44:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:44:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:44:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:44:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:44:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:44:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:44:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:44:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:44:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:44:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:44:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:44:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:44:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:44:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:44:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:44:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:44:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:44:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:44:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:44:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:44:28,183 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:44:28,183 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:44:28,183 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:44:28,183 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:44:28,183 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:44:28,184 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:44:28,184 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:44:28,184 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:44:28,184 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:44:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:44:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:44:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:44:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:44:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:44:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:44:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:44:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:44:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:44:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:44:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:44:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:44:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:44:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:44:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 04:44:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:44:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-19 04:44:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-19 04:44:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:44:28,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:44:28,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:44:28,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:44:28,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:44:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 04:44:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:44:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 04:44:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:44:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:44:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 04:44:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:44:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-19 04:44:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 04:44:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 04:44:28,484 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:44:28,486 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:44:29,481 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:44:29,498 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:44:29,498 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-19 04:44:29,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:44:29 BoogieIcfgContainer [2021-11-19 04:44:29,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:44:29,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:44:29,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:44:29,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:44:29,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:44:27" (1/3) ... [2021-11-19 04:44:29,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300e2225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:44:29, skipping insertion in model container [2021-11-19 04:44:29,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:44:27" (2/3) ... [2021-11-19 04:44:29,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300e2225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:44:29, skipping insertion in model container [2021-11-19 04:44:29,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:44:29" (3/3) ... [2021-11-19 04:44:29,523 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-11-19 04:44:29,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:44:29,532 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2021-11-19 04:44:29,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:44:29,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:44:29,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2021-11-19 04:44:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 169 states, 87 states have (on average 2.2298850574712645) internal successors, (194), 164 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:44:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:44:29,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:29,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:29,638 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1610416047, now seen corresponding path program 1 times [2021-11-19 04:44:29,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:29,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418747586] [2021-11-19 04:44:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:29,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:29,672 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:29,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 04:44:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:44:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:30,011 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 [2021-11-19 04:44:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:30,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:30,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:30,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418747586] [2021-11-19 04:44:30,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418747586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:30,091 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:30,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 04:44:30,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894479866] [2021-11-19 04:44:30,096 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:30,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:44:30,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:44:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:44:30,154 INFO L87 Difference]: Start difference. First operand has 169 states, 87 states have (on average 2.2298850574712645) internal successors, (194), 164 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-19 04:44:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:30,678 INFO L93 Difference]: Finished difference Result 195 states and 202 transitions. [2021-11-19 04:44:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:44:30,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-11-19 04:44:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:30,701 INFO L225 Difference]: With dead ends: 195 [2021-11-19 04:44:30,702 INFO L226 Difference]: Without dead ends: 191 [2021-11-19 04:44:30,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:44:30,720 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:30,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 119 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:44:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-19 04:44:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 163. [2021-11-19 04:44:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.9186046511627908) internal successors, (165), 159 states have internal predecessors, (165), 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) [2021-11-19 04:44:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 168 transitions. [2021-11-19 04:44:30,794 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 168 transitions. Word has length 7 [2021-11-19 04:44:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:30,795 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 168 transitions. [2021-11-19 04:44:30,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-19 04:44:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 168 transitions. [2021-11-19 04:44:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:44:30,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:30,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:30,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:30,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:30,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:30,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1610416046, now seen corresponding path program 1 times [2021-11-19 04:44:31,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:31,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666546405] [2021-11-19 04:44:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:31,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:31,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:31,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:31,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 04:44:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:44:31,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:31,222 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 [2021-11-19 04:44:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:31,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:31,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:31,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666546405] [2021-11-19 04:44:31,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666546405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:31,336 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:31,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 04:44:31,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990933338] [2021-11-19 04:44:31,337 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:31,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:31,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:31,341 INFO L87 Difference]: Start difference. First operand 163 states and 168 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-19 04:44:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:31,824 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2021-11-19 04:44:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:44:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2021-11-19 04:44:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:31,828 INFO L225 Difference]: With dead ends: 160 [2021-11-19 04:44:31,828 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 04:44:31,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:31,830 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 156 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:31,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 101 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:44:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 04:44:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-11-19 04:44:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 86 states have (on average 1.8837209302325582) internal successors, (162), 156 states have internal predecessors, (162), 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) [2021-11-19 04:44:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2021-11-19 04:44:31,868 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 7 [2021-11-19 04:44:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:31,869 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2021-11-19 04:44:31,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-19 04:44:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2021-11-19 04:44:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:44:31,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:31,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:31,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 04:44:32,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:32,085 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash -352660203, now seen corresponding path program 1 times [2021-11-19 04:44:32,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:32,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046722184] [2021-11-19 04:44:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:32,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:32,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:32,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:32,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 04:44:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:44:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:32,293 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 [2021-11-19 04:44:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:32,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:32,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:32,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046722184] [2021-11-19 04:44:32,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046722184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:32,343 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:32,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 04:44:32,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588843887] [2021-11-19 04:44:32,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:32,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:44:32,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:44:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:44:32,346 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-19 04:44:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:32,715 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2021-11-19 04:44:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:44:32,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-11-19 04:44:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:32,717 INFO L225 Difference]: With dead ends: 159 [2021-11-19 04:44:32,717 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 04:44:32,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:44:32,719 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 133 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:32,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 103 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:44:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 04:44:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-11-19 04:44:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 88 states have (on average 1.8068181818181819) internal successors, (159), 151 states have internal predecessors, (159), 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) [2021-11-19 04:44:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 162 transitions. [2021-11-19 04:44:32,734 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 162 transitions. Word has length 11 [2021-11-19 04:44:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:32,735 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 162 transitions. [2021-11-19 04:44:32,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-19 04:44:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 162 transitions. [2021-11-19 04:44:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:44:32,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:32,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:32,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:32,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:32,958 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash -352660202, now seen corresponding path program 1 times [2021-11-19 04:44:32,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:32,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729426061] [2021-11-19 04:44:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:32,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:32,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:32,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 04:44:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:33,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:44:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:33,158 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 [2021-11-19 04:44:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:33,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:33,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:33,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729426061] [2021-11-19 04:44:33,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729426061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:33,260 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:33,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 04:44:33,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077822332] [2021-11-19 04:44:33,260 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:33,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:33,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:33,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:33,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:33,262 INFO L87 Difference]: Start difference. First operand 155 states and 162 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-19 04:44:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:33,797 INFO L93 Difference]: Finished difference Result 172 states and 178 transitions. [2021-11-19 04:44:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:44:33,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2021-11-19 04:44:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:33,800 INFO L225 Difference]: With dead ends: 172 [2021-11-19 04:44:33,800 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 04:44:33,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:33,802 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 143 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:33,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 122 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:44:33,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 04:44:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 159. [2021-11-19 04:44:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 95 states have (on average 1.7157894736842105) internal successors, (163), 155 states have internal predecessors, (163), 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) [2021-11-19 04:44:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 166 transitions. [2021-11-19 04:44:33,824 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 166 transitions. Word has length 11 [2021-11-19 04:44:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:33,825 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 166 transitions. [2021-11-19 04:44:33,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-19 04:44:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 166 transitions. [2021-11-19 04:44:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:44:33,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:33,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:33,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:34,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:34,040 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2117333470, now seen corresponding path program 1 times [2021-11-19 04:44:34,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:34,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414891046] [2021-11-19 04:44:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:34,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:34,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:34,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 04:44:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:34,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:44:34,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:34,274 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 [2021-11-19 04:44:34,369 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-19 04:44:34,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 26 [2021-11-19 04:44:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:34,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:34,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:34,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414891046] [2021-11-19 04:44:34,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414891046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:34,522 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:34,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 04:44:34,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860874209] [2021-11-19 04:44:34,522 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:34,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:44:34,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:44:34,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:44:34,524 INFO L87 Difference]: Start difference. First operand 159 states and 166 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-19 04:44:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:35,111 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2021-11-19 04:44:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:44:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 16 [2021-11-19 04:44:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:35,114 INFO L225 Difference]: With dead ends: 160 [2021-11-19 04:44:35,114 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 04:44:35,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:35,115 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 211 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:35,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 91 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:44:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 04:44:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 146. [2021-11-19 04:44:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 97 states have (on average 1.5670103092783505) internal successors, (152), 142 states have internal predecessors, (152), 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) [2021-11-19 04:44:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 155 transitions. [2021-11-19 04:44:35,126 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 155 transitions. Word has length 16 [2021-11-19 04:44:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:35,127 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 155 transitions. [2021-11-19 04:44:35,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-19 04:44:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 155 transitions. [2021-11-19 04:44:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:44:35,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:35,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:35,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:35,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:35,343 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2117333471, now seen corresponding path program 1 times [2021-11-19 04:44:35,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:35,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026955122] [2021-11-19 04:44:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:35,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:35,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:35,346 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:35,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 04:44:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:44:35,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:35,575 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 [2021-11-19 04:44:35,697 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:44:35,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-19 04:44:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:35,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:36,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:36,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026955122] [2021-11-19 04:44:36,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026955122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:36,196 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:36,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-19 04:44:36,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557715151] [2021-11-19 04:44:36,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:36,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:44:36,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:36,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:44:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:44:36,199 INFO L87 Difference]: Start difference. First operand 146 states and 155 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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) [2021-11-19 04:44:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:36,761 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2021-11-19 04:44:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:44:36,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 16 [2021-11-19 04:44:36,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:36,764 INFO L225 Difference]: With dead ends: 169 [2021-11-19 04:44:36,764 INFO L226 Difference]: Without dead ends: 169 [2021-11-19 04:44:36,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:44:36,765 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 140 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:36,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 217 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 132 Unchecked, 0.5s Time] [2021-11-19 04:44:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-19 04:44:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-11-19 04:44:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.5480769230769231) internal successors, (161), 148 states have internal predecessors, (161), 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) [2021-11-19 04:44:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2021-11-19 04:44:36,775 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 16 [2021-11-19 04:44:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:36,776 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2021-11-19 04:44:36,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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) [2021-11-19 04:44:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2021-11-19 04:44:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 04:44:36,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:36,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:36,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:36,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:36,992 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1056980816, now seen corresponding path program 1 times [2021-11-19 04:44:36,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:36,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383218569] [2021-11-19 04:44:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:36,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:36,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:36,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:37,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 04:44:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:44:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:37,164 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 [2021-11-19 04:44:37,202 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:44:37,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-11-19 04:44:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:37,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:37,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:37,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383218569] [2021-11-19 04:44:37,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383218569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:37,349 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:37,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 04:44:37,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64169353] [2021-11-19 04:44:37,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:37,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:44:37,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:44:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:37,351 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-11-19 04:44:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:37,927 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2021-11-19 04:44:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:44:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 [2021-11-19 04:44:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:37,934 INFO L225 Difference]: With dead ends: 201 [2021-11-19 04:44:37,934 INFO L226 Difference]: Without dead ends: 201 [2021-11-19 04:44:37,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:44:37,936 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 306 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:37,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 161 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:44:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-19 04:44:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 150. [2021-11-19 04:44:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 103 states have (on average 1.5242718446601942) internal successors, (157), 146 states have internal predecessors, (157), 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) [2021-11-19 04:44:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2021-11-19 04:44:37,945 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 18 [2021-11-19 04:44:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:37,945 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2021-11-19 04:44:37,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-11-19 04:44:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2021-11-19 04:44:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:44:37,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:37,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:37,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 04:44:38,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:38,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:38,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1593337329, now seen corresponding path program 1 times [2021-11-19 04:44:38,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:38,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361320250] [2021-11-19 04:44:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:38,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:38,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:38,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:38,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 04:44:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:38,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:44:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:38,354 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 [2021-11-19 04:44:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:38,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:38,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:38,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361320250] [2021-11-19 04:44:38,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361320250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:38,767 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:38,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 04:44:38,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520993915] [2021-11-19 04:44:38,768 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:38,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:44:38,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:38,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:44:38,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:44:38,769 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-11-19 04:44:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:39,736 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-11-19 04:44:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:44:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 19 [2021-11-19 04:44:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:39,739 INFO L225 Difference]: With dead ends: 167 [2021-11-19 04:44:39,739 INFO L226 Difference]: Without dead ends: 167 [2021-11-19 04:44:39,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:44:39,740 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 204 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:39,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 134 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:44:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-19 04:44:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-11-19 04:44:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 106 states have (on average 1.490566037735849) internal successors, (158), 147 states have internal predecessors, (158), 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) [2021-11-19 04:44:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2021-11-19 04:44:39,748 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 19 [2021-11-19 04:44:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:39,748 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2021-11-19 04:44:39,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-11-19 04:44:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2021-11-19 04:44:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:44:39,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:39,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:39,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:39,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:39,963 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:39,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1591729511, now seen corresponding path program 1 times [2021-11-19 04:44:39,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:39,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398104588] [2021-11-19 04:44:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:39,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:39,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:39,966 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:39,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 04:44:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:44:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:40,125 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 [2021-11-19 04:44:40,140 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 20 treesize of output 16 [2021-11-19 04:44:40,166 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 21 treesize of output 13 [2021-11-19 04:44:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:40,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:40,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:40,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398104588] [2021-11-19 04:44:40,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398104588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:40,246 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:40,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 04:44:40,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880792414] [2021-11-19 04:44:40,247 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:40,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:44:40,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:40,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:44:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:44:40,249 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-19 04:44:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:40,813 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-11-19 04:44:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:44:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 19 [2021-11-19 04:44:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:40,816 INFO L225 Difference]: With dead ends: 150 [2021-11-19 04:44:40,816 INFO L226 Difference]: Without dead ends: 150 [2021-11-19 04:44:40,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:44:40,817 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 8 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:40,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 347 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:44:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-19 04:44:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-19 04:44:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.471698113207547) internal successors, (156), 146 states have internal predecessors, (156), 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) [2021-11-19 04:44:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 159 transitions. [2021-11-19 04:44:40,824 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 159 transitions. Word has length 19 [2021-11-19 04:44:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:40,825 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 159 transitions. [2021-11-19 04:44:40,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-19 04:44:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 159 transitions. [2021-11-19 04:44:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:44:40,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:40,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:40,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:41,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:41,043 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1591729512, now seen corresponding path program 1 times [2021-11-19 04:44:41,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:41,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490674655] [2021-11-19 04:44:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:41,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:41,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:41,046 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:41,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 04:44:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:41,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:44:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:41,253 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 [2021-11-19 04:44:41,280 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 [2021-11-19 04:44:41,302 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 17 treesize of output 13 [2021-11-19 04:44:41,350 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 31 treesize of output 23 [2021-11-19 04:44:41,354 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 20 treesize of output 12 [2021-11-19 04:44:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:41,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:41,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:41,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490674655] [2021-11-19 04:44:41,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490674655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:41,604 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:41,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-19 04:44:41,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492479816] [2021-11-19 04:44:41,604 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:41,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:44:41,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:44:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:44:41,610 INFO L87 Difference]: Start difference. First operand 150 states and 159 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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) [2021-11-19 04:44:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:42,978 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2021-11-19 04:44:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:44:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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 19 [2021-11-19 04:44:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:42,981 INFO L225 Difference]: With dead ends: 149 [2021-11-19 04:44:42,982 INFO L226 Difference]: Without dead ends: 149 [2021-11-19 04:44:42,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:44:42,983 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 8 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:42,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 382 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 04:44:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-19 04:44:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-19 04:44:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 106 states have (on average 1.4528301886792452) internal successors, (154), 145 states have internal predecessors, (154), 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) [2021-11-19 04:44:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2021-11-19 04:44:42,991 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 19 [2021-11-19 04:44:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:42,991 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2021-11-19 04:44:42,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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) [2021-11-19 04:44:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2021-11-19 04:44:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:44:42,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:42,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:43,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:43,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:43,208 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2106147056, now seen corresponding path program 1 times [2021-11-19 04:44:43,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:43,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267582182] [2021-11-19 04:44:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:43,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:43,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:43,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:43,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 04:44:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:44:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:43,389 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 [2021-11-19 04:44:43,489 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 [2021-11-19 04:44:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:43,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:43,607 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:43,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267582182] [2021-11-19 04:44:43,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267582182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:43,608 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:43,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-11-19 04:44:43,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185816996] [2021-11-19 04:44:43,608 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:43,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:44:43,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:44:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:44:43,610 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-11-19 04:44:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:44,459 INFO L93 Difference]: Finished difference Result 203 states and 215 transitions. [2021-11-19 04:44:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:44:44,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 21 [2021-11-19 04:44:44,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:44,462 INFO L225 Difference]: With dead ends: 203 [2021-11-19 04:44:44,462 INFO L226 Difference]: Without dead ends: 203 [2021-11-19 04:44:44,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:44:44,463 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 202 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:44,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 446 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:44:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-19 04:44:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 154. [2021-11-19 04:44:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.4324324324324325) internal successors, (159), 150 states have internal predecessors, (159), 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) [2021-11-19 04:44:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2021-11-19 04:44:44,473 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 21 [2021-11-19 04:44:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:44,473 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2021-11-19 04:44:44,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-11-19 04:44:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2021-11-19 04:44:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:44:44,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:44,479 INFO L514 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] [2021-11-19 04:44:44,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:44,691 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 124262505, now seen corresponding path program 1 times [2021-11-19 04:44:44,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:44,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827099168] [2021-11-19 04:44:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:44,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:44,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:44,695 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:44,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 04:44:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:44,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:44:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:44,956 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 [2021-11-19 04:44:45,012 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 04:44:45,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-19 04:44:45,082 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 24 treesize of output 20 [2021-11-19 04:44:45,295 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:44:45,295 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-11-19 04:44:45,447 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:44:45,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 43 [2021-11-19 04:44:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:45,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:50,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:50,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827099168] [2021-11-19 04:44:50,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827099168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:44:50,049 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:44:50,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 6] imperfect sequences [] total 13 [2021-11-19 04:44:50,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691255013] [2021-11-19 04:44:50,050 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:44:50,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:44:50,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:44:50,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=135, Unknown=2, NotChecked=0, Total=182 [2021-11-19 04:44:50,052 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-11-19 04:44:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:50,970 INFO L93 Difference]: Finished difference Result 183 states and 194 transitions. [2021-11-19 04:44:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:44:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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 23 [2021-11-19 04:44:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:50,973 INFO L225 Difference]: With dead ends: 183 [2021-11-19 04:44:50,973 INFO L226 Difference]: Without dead ends: 183 [2021-11-19 04:44:50,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=57, Invalid=181, Unknown=2, NotChecked=0, Total=240 [2021-11-19 04:44:50,975 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 122 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:50,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 398 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 344 Invalid, 0 Unknown, 180 Unchecked, 0.8s Time] [2021-11-19 04:44:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-19 04:44:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2021-11-19 04:44:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 111 states have (on average 1.4234234234234233) internal successors, (158), 149 states have internal predecessors, (158), 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) [2021-11-19 04:44:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 161 transitions. [2021-11-19 04:44:50,992 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 161 transitions. Word has length 23 [2021-11-19 04:44:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:50,993 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 161 transitions. [2021-11-19 04:44:50,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-11-19 04:44:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 161 transitions. [2021-11-19 04:44:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:44:50,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:50,997 INFO L514 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] [2021-11-19 04:44:51,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:51,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:51,212 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:44:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash 124262506, now seen corresponding path program 1 times [2021-11-19 04:44:51,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:51,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449132967] [2021-11-19 04:44:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:51,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:51,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:51,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:51,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 04:44:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:44:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:44:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:51,502 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 [2021-11-19 04:44:51,562 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 [2021-11-19 04:44:51,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:44:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-19 04:44:51,618 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 [2021-11-19 04:44:51,627 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 21 treesize of output 17 [2021-11-19 04:44:51,780 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:44:51,781 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-19 04:44:51,807 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 04:44:51,808 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 59 treesize of output 54 [2021-11-19 04:44:51,944 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:44:51,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-11-19 04:44:51,955 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:44:51,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-11-19 04:44:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:44:52,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:54,396 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|main_#t~mem5.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem5.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem5.base|) (bvadd (_ bv4 32) |main_#t~mem5.offset|) c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((|main_#t~mem5.offset| (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv4 32) |main_#t~mem5.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem5.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem5.base|) .cse1 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem5.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem5.base|) .cse1 c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset)))))) is different from false [2021-11-19 04:45:02,283 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:45:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:02,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:02,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449132967] [2021-11-19 04:45:02,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449132967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:02,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:02,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-19 04:45:02,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114878055] [2021-11-19 04:45:02,898 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:02,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:45:02,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:02,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:45:02,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=172, Unknown=1, NotChecked=26, Total=240 [2021-11-19 04:45:02,900 INFO L87 Difference]: Start difference. First operand 153 states and 161 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-11-19 04:45:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:07,559 INFO L93 Difference]: Finished difference Result 211 states and 225 transitions. [2021-11-19 04:45:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:45:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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 23 [2021-11-19 04:45:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:07,562 INFO L225 Difference]: With dead ends: 211 [2021-11-19 04:45:07,562 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 04:45:07,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=251, Invalid=942, Unknown=1, NotChecked=66, Total=1260 [2021-11-19 04:45:07,564 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 236 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:07,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 534 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 721 Invalid, 0 Unknown, 161 Unchecked, 3.1s Time] [2021-11-19 04:45:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 04:45:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 145. [2021-11-19 04:45:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 111 states have (on average 1.3513513513513513) internal successors, (150), 141 states have internal predecessors, (150), 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) [2021-11-19 04:45:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 153 transitions. [2021-11-19 04:45:07,572 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 153 transitions. Word has length 23 [2021-11-19 04:45:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:07,572 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 153 transitions. [2021-11-19 04:45:07,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-11-19 04:45:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 153 transitions. [2021-11-19 04:45:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:45:07,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:07,574 INFO L514 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, 1, 1, 1, 1] [2021-11-19 04:45:07,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 04:45:07,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:07,789 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:07,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1488771985, now seen corresponding path program 1 times [2021-11-19 04:45:07,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:07,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292582720] [2021-11-19 04:45:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:07,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:07,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:07,792 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:07,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 04:45:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:07,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:45:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:07,986 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 [2021-11-19 04:45:08,124 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 [2021-11-19 04:45:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:08,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:08,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:08,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292582720] [2021-11-19 04:45:08,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292582720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:08,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:08,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-11-19 04:45:08,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375287269] [2021-11-19 04:45:08,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:08,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:45:08,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:45:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:45:08,320 INFO L87 Difference]: Start difference. First operand 145 states and 153 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2021-11-19 04:45:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:09,439 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2021-11-19 04:45:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:45:09,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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 28 [2021-11-19 04:45:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:09,442 INFO L225 Difference]: With dead ends: 192 [2021-11-19 04:45:09,442 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 04:45:09,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:45:09,444 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 278 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:09,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 470 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:45:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 04:45:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 149. [2021-11-19 04:45:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 115 states have (on average 1.3391304347826087) internal successors, (154), 145 states have internal predecessors, (154), 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) [2021-11-19 04:45:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2021-11-19 04:45:09,451 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 28 [2021-11-19 04:45:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:09,452 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2021-11-19 04:45:09,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2021-11-19 04:45:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2021-11-19 04:45:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:45:09,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:09,454 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:09,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:09,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:09,668 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:09,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1530790238, now seen corresponding path program 1 times [2021-11-19 04:45:09,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:09,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133691186] [2021-11-19 04:45:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:09,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:09,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:09,671 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:09,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 04:45:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:09,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:45:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:09,932 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 [2021-11-19 04:45:09,941 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 [2021-11-19 04:45:09,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:09,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-19 04:45:10,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:10,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-19 04:45:10,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:10,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:10,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:45:10,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-19 04:45:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:10,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:10,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-19 04:45:10,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:45:10,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-19 04:45:10,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:45:10,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-11-19 04:45:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:10,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:11,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:11,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133691186] [2021-11-19 04:45:11,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133691186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:45:11,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:45:11,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-11-19 04:45:11,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43299315] [2021-11-19 04:45:11,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:11,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:45:11,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:45:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:45:11,079 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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) [2021-11-19 04:45:13,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:13,066 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-11-19 04:45:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:45:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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 28 [2021-11-19 04:45:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:13,068 INFO L225 Difference]: With dead ends: 171 [2021-11-19 04:45:13,068 INFO L226 Difference]: Without dead ends: 171 [2021-11-19 04:45:13,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:45:13,070 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 256 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:13,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 516 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 04:45:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-19 04:45:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2021-11-19 04:45:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 148 states have internal predecessors, (157), 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) [2021-11-19 04:45:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2021-11-19 04:45:13,085 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 28 [2021-11-19 04:45:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:13,086 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2021-11-19 04:45:13,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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) [2021-11-19 04:45:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2021-11-19 04:45:13,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:45:13,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:13,098 INFO L514 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, 1, 1, 1, 1] [2021-11-19 04:45:13,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:13,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:13,311 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr40ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash 66805131, now seen corresponding path program 1 times [2021-11-19 04:45:13,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:13,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170842094] [2021-11-19 04:45:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:13,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:13,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:13,315 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:13,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 04:45:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:13,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:45:13,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:13,519 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 [2021-11-19 04:45:13,539 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 19 treesize of output 7 [2021-11-19 04:45:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:13,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:13,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:13,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170842094] [2021-11-19 04:45:13,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170842094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:13,615 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:13,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 04:45:13,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824116375] [2021-11-19 04:45:13,615 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:13,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:45:13,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:45:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:45:13,617 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-11-19 04:45:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:13,919 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2021-11-19 04:45:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:45:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 28 [2021-11-19 04:45:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:13,921 INFO L225 Difference]: With dead ends: 150 [2021-11-19 04:45:13,922 INFO L226 Difference]: Without dead ends: 150 [2021-11-19 04:45:13,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:45:13,923 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 15 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:13,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 294 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:45:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-19 04:45:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-19 04:45:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 117 states have (on average 1.3247863247863247) internal successors, (155), 146 states have internal predecessors, (155), 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) [2021-11-19 04:45:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2021-11-19 04:45:13,930 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 28 [2021-11-19 04:45:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:13,931 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2021-11-19 04:45:13,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-11-19 04:45:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2021-11-19 04:45:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:45:13,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:13,933 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:13,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 04:45:14,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:14,147 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash 36943448, now seen corresponding path program 1 times [2021-11-19 04:45:14,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:14,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418912186] [2021-11-19 04:45:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:14,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:14,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:14,150 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:14,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 04:45:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:45:14,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:14,359 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 [2021-11-19 04:45:14,378 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 [2021-11-19 04:45:14,408 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 19 treesize of output 11 [2021-11-19 04:45:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:14,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:14,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:14,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418912186] [2021-11-19 04:45:14,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418912186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:14,480 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:14,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 04:45:14,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821090786] [2021-11-19 04:45:14,481 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:14,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:45:14,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:14,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:45:14,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:45:14,482 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-11-19 04:45:14,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:14,994 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2021-11-19 04:45:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:45:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 30 [2021-11-19 04:45:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:14,996 INFO L225 Difference]: With dead ends: 149 [2021-11-19 04:45:14,996 INFO L226 Difference]: Without dead ends: 149 [2021-11-19 04:45:14,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:45:14,998 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 6 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:14,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 313 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:45:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-19 04:45:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-19 04:45:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.3162393162393162) internal successors, (154), 145 states have internal predecessors, (154), 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) [2021-11-19 04:45:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2021-11-19 04:45:15,005 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 30 [2021-11-19 04:45:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:15,005 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2021-11-19 04:45:15,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-11-19 04:45:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2021-11-19 04:45:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:45:15,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:15,007 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:15,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:15,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:15,222 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash 36943449, now seen corresponding path program 1 times [2021-11-19 04:45:15,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:15,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417852860] [2021-11-19 04:45:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:15,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:15,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:15,224 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:15,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 04:45:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:15,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:45:15,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:15,441 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 [2021-11-19 04:45:15,464 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 [2021-11-19 04:45:15,470 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 17 treesize of output 13 [2021-11-19 04:45:15,527 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 31 treesize of output 23 [2021-11-19 04:45:15,531 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 20 treesize of output 12 [2021-11-19 04:45:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:15,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:15,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:15,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417852860] [2021-11-19 04:45:15,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417852860] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:15,814 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:15,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-19 04:45:15,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993891056] [2021-11-19 04:45:15,814 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:15,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:45:15,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:15,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:45:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:45:15,816 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-11-19 04:45:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:17,131 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-11-19 04:45:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:45:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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 30 [2021-11-19 04:45:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:17,134 INFO L225 Difference]: With dead ends: 148 [2021-11-19 04:45:17,134 INFO L226 Difference]: Without dead ends: 148 [2021-11-19 04:45:17,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:45:17,135 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 5 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:17,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 456 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:45:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-19 04:45:17,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-19 04:45:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 117 states have (on average 1.3076923076923077) internal successors, (153), 144 states have internal predecessors, (153), 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) [2021-11-19 04:45:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 156 transitions. [2021-11-19 04:45:17,142 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 156 transitions. Word has length 30 [2021-11-19 04:45:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:17,143 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 156 transitions. [2021-11-19 04:45:17,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-11-19 04:45:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 156 transitions. [2021-11-19 04:45:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:45:17,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:17,144 INFO L514 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:17,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:17,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:17,359 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1625836410, now seen corresponding path program 1 times [2021-11-19 04:45:17,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:17,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20003963] [2021-11-19 04:45:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:17,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:17,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:17,362 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:17,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 04:45:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:45:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:17,669 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 [2021-11-19 04:45:17,677 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 [2021-11-19 04:45:17,745 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-19 04:45:17,746 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 [2021-11-19 04:45:17,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:45:17,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-19 04:45:17,814 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 29 treesize of output 21 [2021-11-19 04:45:17,827 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 18 treesize of output 10 [2021-11-19 04:45:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:17,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:18,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:18,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20003963] [2021-11-19 04:45:18,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20003963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:18,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:18,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 04:45:18,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931185829] [2021-11-19 04:45:18,010 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:18,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:45:18,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:45:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:45:18,012 INFO L87 Difference]: Start difference. First operand 148 states and 156 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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) [2021-11-19 04:45:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:18,555 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-11-19 04:45:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:45:18,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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 31 [2021-11-19 04:45:18,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:18,558 INFO L225 Difference]: With dead ends: 146 [2021-11-19 04:45:18,558 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 04:45:18,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:45:18,559 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 113 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:18,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 338 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:45:18,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 04:45:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-19 04:45:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 116 states have (on average 1.3017241379310345) internal successors, (151), 142 states have internal predecessors, (151), 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) [2021-11-19 04:45:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2021-11-19 04:45:18,566 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 31 [2021-11-19 04:45:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:18,567 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2021-11-19 04:45:18,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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) [2021-11-19 04:45:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2021-11-19 04:45:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:45:18,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:18,568 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:18,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:18,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:18,794 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:18,794 INFO L85 PathProgramCache]: Analyzing trace with hash -939174818, now seen corresponding path program 1 times [2021-11-19 04:45:18,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:18,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126679117] [2021-11-19 04:45:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:18,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:18,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:18,796 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:18,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 04:45:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:19,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:45:19,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:19,065 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 [2021-11-19 04:45:19,103 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-19 04:45:19,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 20 [2021-11-19 04:45:19,260 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:45:19,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-19 04:45:19,297 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 20 treesize of output 16 [2021-11-19 04:45:19,401 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:45:19,401 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-19 04:45:19,497 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:45:19,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2021-11-19 04:45:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:19,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:23,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:23,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126679117] [2021-11-19 04:45:23,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126679117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:23,519 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:23,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 8] imperfect sequences [] total 14 [2021-11-19 04:45:23,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118943529] [2021-11-19 04:45:23,520 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:23,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:45:23,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:45:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:45:23,522 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-11-19 04:45:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:24,489 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2021-11-19 04:45:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:45:24,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 33 [2021-11-19 04:45:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:24,491 INFO L225 Difference]: With dead ends: 177 [2021-11-19 04:45:24,492 INFO L226 Difference]: Without dead ends: 177 [2021-11-19 04:45:24,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:45:24,493 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 25 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:24,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 693 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 347 Invalid, 0 Unknown, 219 Unchecked, 0.9s Time] [2021-11-19 04:45:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-19 04:45:24,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-11-19 04:45:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 127 states have (on average 1.2834645669291338) internal successors, (163), 153 states have internal predecessors, (163), 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) [2021-11-19 04:45:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 166 transitions. [2021-11-19 04:45:24,500 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 166 transitions. Word has length 33 [2021-11-19 04:45:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:24,501 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 166 transitions. [2021-11-19 04:45:24,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-11-19 04:45:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 166 transitions. [2021-11-19 04:45:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:45:24,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:24,503 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:24,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:24,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:24,719 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr64ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash 703031177, now seen corresponding path program 1 times [2021-11-19 04:45:24,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:24,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895946710] [2021-11-19 04:45:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:24,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:24,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:24,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 04:45:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:24,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:45:24,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:24,881 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 [2021-11-19 04:45:24,968 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 19 treesize of output 7 [2021-11-19 04:45:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:45:24,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:45:25,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:25,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895946710] [2021-11-19 04:45:25,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895946710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:25,113 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:25,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 04:45:25,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973604207] [2021-11-19 04:45:25,114 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:25,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:45:25,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:45:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:45:25,116 INFO L87 Difference]: Start difference. First operand 157 states and 166 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-19 04:45:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:25,531 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2021-11-19 04:45:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:45:25,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 34 [2021-11-19 04:45:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:25,533 INFO L225 Difference]: With dead ends: 166 [2021-11-19 04:45:25,533 INFO L226 Difference]: Without dead ends: 166 [2021-11-19 04:45:25,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:45:25,534 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 7 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:25,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 463 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:45:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-19 04:45:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-11-19 04:45:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 130 states have (on average 1.2769230769230768) internal successors, (166), 156 states have internal predecessors, (166), 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) [2021-11-19 04:45:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2021-11-19 04:45:25,541 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 34 [2021-11-19 04:45:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:25,541 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2021-11-19 04:45:25,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-19 04:45:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2021-11-19 04:45:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:45:25,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:25,542 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:25,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:25,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:25,743 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr74ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:25,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash 724025887, now seen corresponding path program 1 times [2021-11-19 04:45:25,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:25,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848600844] [2021-11-19 04:45:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:25,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:25,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:25,745 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:25,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 04:45:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:25,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:45:25,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:45:26,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:45:26,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:26,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848600844] [2021-11-19 04:45:26,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848600844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:26,163 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:26,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 04:45:26,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146793523] [2021-11-19 04:45:26,164 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:26,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:45:26,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:45:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:26,165 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-11-19 04:45:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:26,306 INFO L93 Difference]: Finished difference Result 162 states and 171 transitions. [2021-11-19 04:45:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:45:26,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2021-11-19 04:45:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:26,313 INFO L225 Difference]: With dead ends: 162 [2021-11-19 04:45:26,313 INFO L226 Difference]: Without dead ends: 162 [2021-11-19 04:45:26,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:26,314 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 66 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:26,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 128 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:45:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-19 04:45:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-19 04:45:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 132 states have (on average 1.2727272727272727) internal successors, (168), 158 states have internal predecessors, (168), 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) [2021-11-19 04:45:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2021-11-19 04:45:26,326 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 34 [2021-11-19 04:45:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:26,326 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2021-11-19 04:45:26,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-11-19 04:45:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2021-11-19 04:45:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:45:26,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:26,330 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:26,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:26,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:26,545 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1167972262, now seen corresponding path program 1 times [2021-11-19 04:45:26,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:26,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712499447] [2021-11-19 04:45:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:26,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:26,547 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:26,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 04:45:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:45:26,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:26,887 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 04:45:26,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-19 04:45:26,951 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 [2021-11-19 04:45:27,160 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:45:27,161 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 31 [2021-11-19 04:45:27,290 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:45:27,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 41 [2021-11-19 04:45:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:27,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:29,523 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem9.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem9.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem9.base|) (bvadd (_ bv4 32) |main_#t~mem9.offset|) c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset)))))))))))))) (_ bv1 1)))) is different from false [2021-11-19 04:45:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:31,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:31,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712499447] [2021-11-19 04:45:31,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712499447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:31,652 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:31,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-11-19 04:45:31,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090214373] [2021-11-19 04:45:31,652 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:31,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:45:31,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:45:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=96, Unknown=1, NotChecked=20, Total=156 [2021-11-19 04:45:31,654 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 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) [2021-11-19 04:45:32,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:32,368 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2021-11-19 04:45:32,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:45:32,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 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 34 [2021-11-19 04:45:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:32,371 INFO L225 Difference]: With dead ends: 161 [2021-11-19 04:45:32,371 INFO L226 Difference]: Without dead ends: 161 [2021-11-19 04:45:32,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=39, Invalid=96, Unknown=1, NotChecked=20, Total=156 [2021-11-19 04:45:32,372 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 43 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:32,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 458 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 238 Unchecked, 0.7s Time] [2021-11-19 04:45:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-19 04:45:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-19 04:45:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.2651515151515151) internal successors, (167), 157 states have internal predecessors, (167), 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) [2021-11-19 04:45:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 170 transitions. [2021-11-19 04:45:32,379 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 170 transitions. Word has length 34 [2021-11-19 04:45:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:32,379 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 170 transitions. [2021-11-19 04:45:32,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 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) [2021-11-19 04:45:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 170 transitions. [2021-11-19 04:45:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:45:32,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:32,380 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:32,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:32,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:32,581 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1167972261, now seen corresponding path program 1 times [2021-11-19 04:45:32,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:32,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952804155] [2021-11-19 04:45:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:32,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:32,584 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 04:45:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:45:32,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:32,927 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:45:32,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-19 04:45:32,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-19 04:45:32,975 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 [2021-11-19 04:45:32,983 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 21 treesize of output 17 [2021-11-19 04:45:33,125 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:45:33,126 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-19 04:45:33,148 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 04:45:33,148 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 59 treesize of output 54 [2021-11-19 04:45:33,291 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:45:33,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-11-19 04:45:33,300 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:45:33,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-11-19 04:45:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:33,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:52,220 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:45:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:52,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:52,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952804155] [2021-11-19 04:45:52,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952804155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:52,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:52,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-19 04:45:52,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190144376] [2021-11-19 04:45:52,711 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:52,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:45:52,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:45:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=165, Unknown=4, NotChecked=0, Total=210 [2021-11-19 04:45:52,712 INFO L87 Difference]: Start difference. First operand 161 states and 170 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 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) [2021-11-19 04:45:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:59,332 INFO L93 Difference]: Finished difference Result 191 states and 202 transitions. [2021-11-19 04:45:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:45:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 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 34 [2021-11-19 04:45:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:59,334 INFO L225 Difference]: With dead ends: 191 [2021-11-19 04:45:59,334 INFO L226 Difference]: Without dead ends: 191 [2021-11-19 04:45:59,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=116, Invalid=385, Unknown=5, NotChecked=0, Total=506 [2021-11-19 04:45:59,335 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 115 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:59,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 582 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 407 Invalid, 0 Unknown, 166 Unchecked, 1.8s Time] [2021-11-19 04:45:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-19 04:45:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 158. [2021-11-19 04:45:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 132 states have (on average 1.2424242424242424) internal successors, (164), 154 states have internal predecessors, (164), 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) [2021-11-19 04:45:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2021-11-19 04:45:59,342 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 34 [2021-11-19 04:45:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:59,342 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2021-11-19 04:45:59,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 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) [2021-11-19 04:45:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2021-11-19 04:45:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:45:59,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:59,344 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:59,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-19 04:45:59,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:59,557 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:45:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash 129788422, now seen corresponding path program 1 times [2021-11-19 04:45:59,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:59,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34482209] [2021-11-19 04:45:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:59,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:59,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:59,559 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:59,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 04:45:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:59,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:45:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:00,112 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 29 treesize of output 21 [2021-11-19 04:46:00,118 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 18 treesize of output 10 [2021-11-19 04:46:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:00,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:00,593 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 04:46:00,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-19 04:46:00,603 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 04:46:00,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 04:46:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:00,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:46:00,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34482209] [2021-11-19 04:46:00,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34482209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:00,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:46:00,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-19 04:46:00,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793718669] [2021-11-19 04:46:00,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:00,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:46:00,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:46:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:46:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:46:00,756 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2021-11-19 04:46:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:03,052 INFO L93 Difference]: Finished difference Result 203 states and 216 transitions. [2021-11-19 04:46:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:46:03,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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 37 [2021-11-19 04:46:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:03,055 INFO L225 Difference]: With dead ends: 203 [2021-11-19 04:46:03,055 INFO L226 Difference]: Without dead ends: 203 [2021-11-19 04:46:03,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:46:03,056 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 289 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:03,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 659 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:46:03,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-19 04:46:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 169. [2021-11-19 04:46:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 143 states have (on average 1.2377622377622377) internal successors, (177), 165 states have internal predecessors, (177), 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) [2021-11-19 04:46:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 180 transitions. [2021-11-19 04:46:03,063 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 180 transitions. Word has length 37 [2021-11-19 04:46:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:03,064 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 180 transitions. [2021-11-19 04:46:03,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2021-11-19 04:46:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 180 transitions. [2021-11-19 04:46:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:46:03,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:03,065 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:03,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:03,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:46:03,279 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr76ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-11-19 04:46:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash -271526566, now seen corresponding path program 1 times [2021-11-19 04:46:03,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:46:03,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209690202] [2021-11-19 04:46:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:03,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:46:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:46:03,281 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:46:03,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 04:46:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:46:03,433 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 04:46:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:46:03,556 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-19 04:46:03,556 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 04:46:03,557 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr76ENSURES_VIOLATIONMEMORY_LEAK (76 of 77 remaining) [2021-11-19 04:46:03,559 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (75 of 77 remaining) [2021-11-19 04:46:03,560 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (74 of 77 remaining) [2021-11-19 04:46:03,560 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (73 of 77 remaining) [2021-11-19 04:46:03,560 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (72 of 77 remaining) [2021-11-19 04:46:03,560 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (71 of 77 remaining) [2021-11-19 04:46:03,561 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (70 of 77 remaining) [2021-11-19 04:46:03,561 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (69 of 77 remaining) [2021-11-19 04:46:03,561 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (68 of 77 remaining) [2021-11-19 04:46:03,561 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (67 of 77 remaining) [2021-11-19 04:46:03,561 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (66 of 77 remaining) [2021-11-19 04:46:03,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (65 of 77 remaining) [2021-11-19 04:46:03,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (64 of 77 remaining) [2021-11-19 04:46:03,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (63 of 77 remaining) [2021-11-19 04:46:03,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (62 of 77 remaining) [2021-11-19 04:46:03,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (61 of 77 remaining) [2021-11-19 04:46:03,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (60 of 77 remaining) [2021-11-19 04:46:03,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (59 of 77 remaining) [2021-11-19 04:46:03,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (58 of 77 remaining) [2021-11-19 04:46:03,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (57 of 77 remaining) [2021-11-19 04:46:03,564 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (56 of 77 remaining) [2021-11-19 04:46:03,564 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (55 of 77 remaining) [2021-11-19 04:46:03,564 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (54 of 77 remaining) [2021-11-19 04:46:03,564 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (53 of 77 remaining) [2021-11-19 04:46:03,564 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (52 of 77 remaining) [2021-11-19 04:46:03,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (51 of 77 remaining) [2021-11-19 04:46:03,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (50 of 77 remaining) [2021-11-19 04:46:03,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION (49 of 77 remaining) [2021-11-19 04:46:03,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (48 of 77 remaining) [2021-11-19 04:46:03,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (47 of 77 remaining) [2021-11-19 04:46:03,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION (46 of 77 remaining) [2021-11-19 04:46:03,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION (45 of 77 remaining) [2021-11-19 04:46:03,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION (44 of 77 remaining) [2021-11-19 04:46:03,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION (43 of 77 remaining) [2021-11-19 04:46:03,566 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION (42 of 77 remaining) [2021-11-19 04:46:03,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION (41 of 77 remaining) [2021-11-19 04:46:03,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION (40 of 77 remaining) [2021-11-19 04:46:03,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION (39 of 77 remaining) [2021-11-19 04:46:03,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION (38 of 77 remaining) [2021-11-19 04:46:03,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION (37 of 77 remaining) [2021-11-19 04:46:03,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION (36 of 77 remaining) [2021-11-19 04:46:03,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ASSERT_VIOLATIONMEMORY_LEAK (35 of 77 remaining) [2021-11-19 04:46:03,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION (34 of 77 remaining) [2021-11-19 04:46:03,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION (33 of 77 remaining) [2021-11-19 04:46:03,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_LEAK (32 of 77 remaining) [2021-11-19 04:46:03,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ASSERT_VIOLATIONMEMORY_LEAK (31 of 77 remaining) [2021-11-19 04:46:03,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45ASSERT_VIOLATIONMEMORY_LEAK (30 of 77 remaining) [2021-11-19 04:46:03,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION (29 of 77 remaining) [2021-11-19 04:46:03,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION (28 of 77 remaining) [2021-11-19 04:46:03,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48ASSERT_VIOLATIONMEMORY_LEAK (27 of 77 remaining) [2021-11-19 04:46:03,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION (26 of 77 remaining) [2021-11-19 04:46:03,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50REQUIRES_VIOLATION (25 of 77 remaining) [2021-11-19 04:46:03,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION (24 of 77 remaining) [2021-11-19 04:46:03,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION (23 of 77 remaining) [2021-11-19 04:46:03,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53ASSERT_VIOLATIONMEMORY_LEAK (22 of 77 remaining) [2021-11-19 04:46:03,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION (21 of 77 remaining) [2021-11-19 04:46:03,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55REQUIRES_VIOLATION (20 of 77 remaining) [2021-11-19 04:46:03,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_LEAK (19 of 77 remaining) [2021-11-19 04:46:03,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57REQUIRES_VIOLATION (18 of 77 remaining) [2021-11-19 04:46:03,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58REQUIRES_VIOLATION (17 of 77 remaining) [2021-11-19 04:46:03,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59REQUIRES_VIOLATION (16 of 77 remaining) [2021-11-19 04:46:03,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60REQUIRES_VIOLATION (15 of 77 remaining) [2021-11-19 04:46:03,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr61REQUIRES_VIOLATION (14 of 77 remaining) [2021-11-19 04:46:03,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr62REQUIRES_VIOLATION (13 of 77 remaining) [2021-11-19 04:46:03,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr63ASSERT_VIOLATIONMEMORY_FREE (12 of 77 remaining) [2021-11-19 04:46:03,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr64ASSERT_VIOLATIONMEMORY_FREE (11 of 77 remaining) [2021-11-19 04:46:03,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr65ASSERT_VIOLATIONMEMORY_FREE (10 of 77 remaining) [2021-11-19 04:46:03,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr66REQUIRES_VIOLATION (9 of 77 remaining) [2021-11-19 04:46:03,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr67REQUIRES_VIOLATION (8 of 77 remaining) [2021-11-19 04:46:03,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr68ASSERT_VIOLATIONMEMORY_FREE (7 of 77 remaining) [2021-11-19 04:46:03,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr69ASSERT_VIOLATIONMEMORY_FREE (6 of 77 remaining) [2021-11-19 04:46:03,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr70ASSERT_VIOLATIONMEMORY_FREE (5 of 77 remaining) [2021-11-19 04:46:03,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr71REQUIRES_VIOLATION (4 of 77 remaining) [2021-11-19 04:46:03,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr72REQUIRES_VIOLATION (3 of 77 remaining) [2021-11-19 04:46:03,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr73ASSERT_VIOLATIONMEMORY_FREE (2 of 77 remaining) [2021-11-19 04:46:03,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr74ASSERT_VIOLATIONMEMORY_FREE (1 of 77 remaining) [2021-11-19 04:46:03,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr75ASSERT_VIOLATIONMEMORY_FREE (0 of 77 remaining) [2021-11-19 04:46:03,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:03,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:46:03,793 INFO L732 BasicCegarLoop]: Path program 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, 1, 1] [2021-11-19 04:46:03,796 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 04:46:03,813 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-19 04:46:03,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:46:03 BoogieIcfgContainer [2021-11-19 04:46:03,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 04:46:03,833 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 04:46:03,833 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 04:46:03,834 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 04:46:03,834 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:44:29" (3/4) ... [2021-11-19 04:46:03,838 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 04:46:03,838 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 04:46:03,839 INFO L158 Benchmark]: Toolchain (without parser) took 96638.91ms. Allocated memory was 69.2MB in the beginning and 92.3MB in the end (delta: 23.1MB). Free memory was 44.5MB in the beginning and 40.9MB in the end (delta: 3.6MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. [2021-11-19 04:46:03,839 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 54.5MB. Free memory is still 33.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:46:03,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 706.35ms. Allocated memory is still 69.2MB. Free memory was 44.4MB in the beginning and 42.4MB in the end (delta: 1.9MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2021-11-19 04:46:03,840 INFO L158 Benchmark]: Boogie Preprocessor took 125.93ms. Allocated memory is still 69.2MB. Free memory was 42.4MB in the beginning and 39.2MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 04:46:03,840 INFO L158 Benchmark]: RCFGBuilder took 1464.93ms. Allocated memory is still 69.2MB. Free memory was 38.9MB in the beginning and 42.9MB in the end (delta: -4.0MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2021-11-19 04:46:03,840 INFO L158 Benchmark]: TraceAbstraction took 94325.75ms. Allocated memory was 69.2MB in the beginning and 92.3MB in the end (delta: 23.1MB). Free memory was 42.3MB in the beginning and 42.1MB in the end (delta: 191.8kB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. [2021-11-19 04:46:03,841 INFO L158 Benchmark]: Witness Printer took 4.65ms. Allocated memory is still 92.3MB. Free memory was 41.8MB in the beginning and 40.9MB in the end (delta: 889.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:46:03,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 54.5MB. Free memory is still 33.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 706.35ms. Allocated memory is still 69.2MB. Free memory was 44.4MB in the beginning and 42.4MB in the end (delta: 1.9MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 125.93ms. Allocated memory is still 69.2MB. Free memory was 42.4MB in the beginning and 39.2MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1464.93ms. Allocated memory is still 69.2MB. Free memory was 38.9MB in the beginning and 42.9MB in the end (delta: -4.0MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * TraceAbstraction took 94325.75ms. Allocated memory was 69.2MB in the beginning and 92.3MB in the end (delta: 23.1MB). Free memory was 42.3MB in the beginning and 42.1MB in the end (delta: 191.8kB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. * Witness Printer took 4.65ms. Allocated memory is still 92.3MB. Free memory was 41.8MB in the beginning and 40.9MB in the end (delta: 889.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 996]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 996. Possible FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) VAL [null={-2147483647:0}] [L1000] null->prev = ((void*)0) VAL [null={-2147483647:0}] [L1001] null->colour = BLACK VAL [null={-2147483647:0}] [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null VAL [list={3:0}, null={-2147483647:0}] [L1005] list->prev = null VAL [list={3:0}, null={-2147483647:0}] [L1006] list->colour = BLACK VAL [list={3:0}, null={-2147483647:0}] [L1008] struct TSLL* end = list; VAL [end={3:0}, list={3:0}, null={-2147483647:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={3:0}, list={3:0}, null={-2147483647:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={3:0}, list={3:0}, null={-2147483647:0}] [L1042] EXPR end->colour VAL [end={3:0}, end->colour=1, list={3:0}, null={-2147483647:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE null != end VAL [end={3:0}, list={3:0}, null={-2147483647:0}] [L1045] EXPR end->colour VAL [end={3:0}, end->colour=1, list={3:0}, null={-2147483647:0}] [L1045] COND FALSE !(RED == end->colour) [L1052] EXPR end->next VAL [end={3:0}, end->next={-2147483647:0}, list={3:0}, null={-2147483647:0}] [L1052] end = end->next [L1043] COND FALSE !(null != end) VAL [end={-2147483647:0}, list={3:0}, null={-2147483647:0}] [L1056] COND TRUE null != list VAL [end={-2147483647:0}, list={3:0}, null={-2147483647:0}] [L1058] EXPR list->colour VAL [end={-2147483647:0}, list={3:0}, list->colour=1, null={-2147483647:0}] [L1058] COND FALSE !(RED == list->colour) [L1067] EXPR list->next VAL [end={-2147483647:0}, list={3:0}, list->next={-2147483647:0}, null={-2147483647:0}] [L1067] end = list->next [L1068] free(list) VAL [end={-2147483647:0}, list={3:0}, null={-2147483647:0}] [L1068] free(list) VAL [end={-2147483647:0}, list={3:0}, null={-2147483647:0}] [L1068] free(list) [L1069] list = end VAL [end={-2147483647:0}, list={-2147483647:0}, null={-2147483647:0}] [L1056] COND FALSE !(null != list) VAL [end={-2147483647:0}, list={-2147483647:0}, null={-2147483647:0}] [L1073] return 0; VAL [\result=0, end={-2147483647:0}, list={-2147483647:0}, null={-2147483647:0}] - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1060]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1060]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1067]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1067]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 178 locations, 77 error locations. Started 1 CEGAR loops. OverallTime: 94.2s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 30.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3235 SdHoareTripleChecker+Valid, 21.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3235 mSDsluCounter, 8525 SdHoareTripleChecker+Invalid, 18.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1096 IncrementalHoareTripleChecker+Unchecked, 6149 mSDsCounter, 333 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6114 IncrementalHoareTripleChecker+Invalid, 7543 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 333 mSolverCounterUnsat, 2376 mSDtfsCounter, 6114 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1237 GetRequests, 995 SyntacticMatches, 20 SemanticMatches, 222 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 51.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=0, InterpolantAutomatonStates: 194, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 443 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 53.3s InterpolantComputationTime, 629 NumberOfCodeBlocks, 629 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1132 ConstructedInterpolants, 41 QuantifiedInterpolants, 7135 SizeOfPredicates, 120 NumberOfNonLiveVariables, 2967 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 50 InterpolantComputations, 46 PerfectInterpolantSequences, 8/14 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 [2021-11-19 04:46:03,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6991fd-9a66-422e-90d3-1759738617c8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample