./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC --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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:27:40,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:27:40,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:27:40,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:27:40,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:27:40,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:27:40,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:27:41,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:27:41,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:27:41,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:27:41,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:27:41,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:27:41,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:27:41,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:27:41,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:27:41,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:27:41,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:27:41,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:27:41,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:27:41,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:27:41,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:27:41,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:27:41,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:27:41,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:27:41,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:27:41,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:27:41,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:27:41,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:27:41,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:27:41,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:27:41,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:27:41,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:27:41,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:27:41,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:27:41,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:27:41,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:27:41,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:27:41,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:27:41,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:27:41,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:27:41,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:27:41,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-11 00:27:41,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:27:41,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:27:41,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:27:41,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:27:41,137 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:27:41,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:27:41,137 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:27:41,138 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 00:27:41,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:27:41,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:27:41,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:27:41,140 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 00:27:41,140 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 00:27:41,141 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 00:27:41,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:27:41,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 00:27:41,141 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:27:41,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:27:41,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:27:41,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:27:41,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:27:41,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:27:41,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:27:41,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:27:41,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:27:41,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:27:41,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:27:41,145 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_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2021-10-11 00:27:41,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:27:41,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:27:41,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:27:41,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:27:41,512 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:27:41,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2021-10-11 00:27:41,607 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/data/e9b4a8461/adf5713d96d84a6aa67acb1c98a2609b/FLAG153f8881b [2021-10-11 00:27:42,160 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:27:42,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2021-10-11 00:27:42,169 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/data/e9b4a8461/adf5713d96d84a6aa67acb1c98a2609b/FLAG153f8881b [2021-10-11 00:27:42,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/data/e9b4a8461/adf5713d96d84a6aa67acb1c98a2609b [2021-10-11 00:27:42,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:27:42,518 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-11 00:27:42,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:27:42,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:27:42,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:27:42,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b70dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42, skipping insertion in model container [2021-10-11 00:27:42,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:27:42,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:27:42,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:27:42,720 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:27:42,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:27:42,752 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:27:42,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42 WrapperNode [2021-10-11 00:27:42,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:27:42,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:27:42,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:27:42,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:27:42,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (1/1) ... [2021-10-11 00:27:42,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:27:42,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:27:42,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:27:42,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:27:42,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:27:42,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-11 00:27:42,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:27:42,900 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-10-11 00:27:42,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-11 00:27:42,901 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-10-11 00:27:42,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:27:42,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-11 00:27:42,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:27:42,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 00:27:42,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:27:42,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-11 00:27:42,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:27:43,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:27:43,366 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-11 00:27:43,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:27:43 BoogieIcfgContainer [2021-10-11 00:27:43,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:27:43,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:27:43,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:27:43,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:27:43,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:27:42" (1/3) ... [2021-10-11 00:27:43,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcdd63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:27:43, skipping insertion in model container [2021-10-11 00:27:43,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:27:42" (2/3) ... [2021-10-11 00:27:43,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcdd63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:27:43, skipping insertion in model container [2021-10-11 00:27:43,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:27:43" (3/3) ... [2021-10-11 00:27:43,380 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2021-10-11 00:27:43,398 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:27:43,417 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2021-10-11 00:27:43,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-11 00:27:43,460 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:27:43,461 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 00:27:43,461 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:27:43,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:27:43,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:27:43,462 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:27:43,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:27:43,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:27:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-10-11 00:27:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:27:43,501 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:43,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:43,502 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-10-11 00:27:43,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:43,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980676076] [2021-10-11 00:27:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:43,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:43,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980676076] [2021-10-11 00:27:43,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:27:43,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:27:43,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349362417] [2021-10-11 00:27:43,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:27:43,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:27:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:27:43,811 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2021-10-11 00:27:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:44,046 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-11 00:27:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:27:44,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-10-11 00:27:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:44,063 INFO L225 Difference]: With dead ends: 58 [2021-10-11 00:27:44,063 INFO L226 Difference]: Without dead ends: 54 [2021-10-11 00:27:44,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:27:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-11 00:27:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-10-11 00:27:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-11 00:27:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-11 00:27:44,127 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-10-11 00:27:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:44,128 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-11 00:27:44,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:27:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-11 00:27:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:27:44,129 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:44,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:44,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:27:44,131 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:44,132 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-10-11 00:27:44,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:44,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405773705] [2021-10-11 00:27:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:44,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:44,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405773705] [2021-10-11 00:27:44,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:27:44,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:27:44,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875669552] [2021-10-11 00:27:44,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:27:44,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:27:44,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:27:44,283 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2021-10-11 00:27:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:44,438 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-10-11 00:27:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:27:44,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 00:27:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:44,444 INFO L225 Difference]: With dead ends: 49 [2021-10-11 00:27:44,444 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 00:27:44,445 INFO L677 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 [2021-10-11 00:27:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 00:27:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-10-11 00:27:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-10-11 00:27:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-10-11 00:27:44,457 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2021-10-11 00:27:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:44,457 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-10-11 00:27:44,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:27:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-10-11 00:27:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:27:44,459 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:44,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:44,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:27:44,459 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:44,460 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2021-10-11 00:27:44,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:44,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345085493] [2021-10-11 00:27:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:44,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:44,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345085493] [2021-10-11 00:27:44,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:27:44,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:27:44,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279545859] [2021-10-11 00:27:44,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:27:44,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:27:44,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:27:44,621 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2021-10-11 00:27:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:44,789 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-11 00:27:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:27:44,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-10-11 00:27:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:44,793 INFO L225 Difference]: With dead ends: 40 [2021-10-11 00:27:44,800 INFO L226 Difference]: Without dead ends: 40 [2021-10-11 00:27:44,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:27:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-11 00:27:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-11 00:27:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-11 00:27:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-11 00:27:44,816 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-10-11 00:27:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:44,816 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-11 00:27:44,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:27:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-11 00:27:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:27:44,819 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:44,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:44,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 00:27:44,820 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2021-10-11 00:27:44,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:44,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960212247] [2021-10-11 00:27:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:44,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:44,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960212247] [2021-10-11 00:27:44,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:27:44,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:27:44,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592343791] [2021-10-11 00:27:44,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:27:44,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:44,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:27:44,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:27:44,987 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2021-10-11 00:27:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:45,159 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-10-11 00:27:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:27:45,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-10-11 00:27:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:45,162 INFO L225 Difference]: With dead ends: 46 [2021-10-11 00:27:45,162 INFO L226 Difference]: Without dead ends: 46 [2021-10-11 00:27:45,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:27:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-11 00:27:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-10-11 00:27:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-10-11 00:27:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-10-11 00:27:45,175 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2021-10-11 00:27:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:45,176 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-10-11 00:27:45,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:27:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-10-11 00:27:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 00:27:45,177 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:45,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:45,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 00:27:45,178 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-10-11 00:27:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:45,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328041965] [2021-10-11 00:27:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:45,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:45,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328041965] [2021-10-11 00:27:45,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:27:45,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:27:45,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091274565] [2021-10-11 00:27:45,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:27:45,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:45,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:27:45,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:27:45,324 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2021-10-11 00:27:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:45,522 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-10-11 00:27:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:27:45,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-10-11 00:27:45,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:45,527 INFO L225 Difference]: With dead ends: 46 [2021-10-11 00:27:45,527 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 00:27:45,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:27:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 00:27:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-10-11 00:27:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-10-11 00:27:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-11 00:27:45,538 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-10-11 00:27:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:45,539 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-11 00:27:45,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:27:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-11 00:27:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:27:45,540 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:45,540 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:45,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 00:27:45,541 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2021-10-11 00:27:45,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:45,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025516630] [2021-10-11 00:27:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:45,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:45,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025516630] [2021-10-11 00:27:45,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438445671] [2021-10-11 00:27:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:27:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:45,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:45,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-10-11 00:27:45,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550602907] [2021-10-11 00:27:45,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:27:45,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:45,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:27:45,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:27:45,786 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2021-10-11 00:27:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:45,916 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-10-11 00:27:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:27:45,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-10-11 00:27:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:45,922 INFO L225 Difference]: With dead ends: 52 [2021-10-11 00:27:45,922 INFO L226 Difference]: Without dead ends: 52 [2021-10-11 00:27:45,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:27:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-11 00:27:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-10-11 00:27:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 00:27:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-10-11 00:27:45,938 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2021-10-11 00:27:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:45,938 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-10-11 00:27:45,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:27:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-10-11 00:27:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:27:45,939 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:45,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:46,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 00:27:46,166 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2021-10-11 00:27:46,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:46,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080841467] [2021-10-11 00:27:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:46,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 00:27:46,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080841467] [2021-10-11 00:27:46,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:27:46,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 00:27:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025953388] [2021-10-11 00:27:46,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:27:46,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:46,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:27:46,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:27:46,338 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2021-10-11 00:27:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:46,561 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-10-11 00:27:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:27:46,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-10-11 00:27:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:46,563 INFO L225 Difference]: With dead ends: 44 [2021-10-11 00:27:46,563 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 00:27:46,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:27:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 00:27:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-11 00:27:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-11 00:27:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-10-11 00:27:46,568 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2021-10-11 00:27:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:46,568 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-10-11 00:27:46,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:27:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-10-11 00:27:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 00:27:46,569 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:46,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:46,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 00:27:46,570 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2021-10-11 00:27:46,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:46,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092982043] [2021-10-11 00:27:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:46,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:46,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092982043] [2021-10-11 00:27:46,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611190048] [2021-10-11 00:27:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:46,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:27:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:46,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:46,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-11 00:27:46,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223749184] [2021-10-11 00:27:46,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 00:27:46,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 00:27:46,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:27:46,918 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2021-10-11 00:27:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:47,226 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-10-11 00:27:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:27:47,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-10-11 00:27:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:47,228 INFO L225 Difference]: With dead ends: 50 [2021-10-11 00:27:47,228 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 00:27:47,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:27:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 00:27:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-10-11 00:27:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-11 00:27:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-10-11 00:27:47,232 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2021-10-11 00:27:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:47,232 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-10-11 00:27:47,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 00:27:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-10-11 00:27:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 00:27:47,233 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:47,234 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:47,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:47,463 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2021-10-11 00:27:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:47,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058676909] [2021-10-11 00:27:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:47,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:47,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058676909] [2021-10-11 00:27:47,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550784245] [2021-10-11 00:27:47,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:47,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:27:47,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:27:47,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:27:47,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 00:27:47,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:47,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-11 00:27:47,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838740392] [2021-10-11 00:27:47,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 00:27:47,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:47,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 00:27:47,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:27:47,749 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2021-10-11 00:27:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:48,075 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-11 00:27:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:27:48,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2021-10-11 00:27:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:48,076 INFO L225 Difference]: With dead ends: 58 [2021-10-11 00:27:48,076 INFO L226 Difference]: Without dead ends: 58 [2021-10-11 00:27:48,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-11 00:27:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-11 00:27:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-10-11 00:27:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-11 00:27:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-11 00:27:48,094 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2021-10-11 00:27:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:48,096 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-11 00:27:48,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 00:27:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-11 00:27:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 00:27:48,097 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:48,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:48,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:48,314 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2021-10-11 00:27:48,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:48,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776174083] [2021-10-11 00:27:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:48,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:48,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:48,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776174083] [2021-10-11 00:27:48,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431237012] [2021-10-11 00:27:48,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:48,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-11 00:27:48,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:27:48,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:27:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:48,584 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-11 00:27:48,585 INFO L382 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-10-11 00:27:48,586 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:48,592 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:48,593 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 00:27:48,594 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2021-10-11 00:27:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 00:27:48,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:27:48,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-10-11 00:27:48,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595061900] [2021-10-11 00:27:48,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:27:48,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:48,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:27:48,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:27:48,753 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 4 states. [2021-10-11 00:27:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:48,783 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-11 00:27:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:27:48,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-10-11 00:27:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:48,785 INFO L225 Difference]: With dead ends: 40 [2021-10-11 00:27:48,785 INFO L226 Difference]: Without dead ends: 40 [2021-10-11 00:27:48,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:27:48,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-11 00:27:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-11 00:27:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-11 00:27:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-11 00:27:48,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2021-10-11 00:27:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:48,789 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-11 00:27:48,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:27:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-11 00:27:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 00:27:48,790 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:48,790 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:48,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:48,994 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:48,994 INFO L82 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2021-10-11 00:27:48,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:48,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648808676] [2021-10-11 00:27:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:49,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:49,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:49,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648808676] [2021-10-11 00:27:49,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070331450] [2021-10-11 00:27:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:27:49,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:49,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:49,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-11 00:27:49,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454296994] [2021-10-11 00:27:49,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 00:27:49,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:49,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 00:27:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:27:49,350 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2021-10-11 00:27:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:49,703 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-10-11 00:27:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:27:49,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2021-10-11 00:27:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:49,705 INFO L225 Difference]: With dead ends: 52 [2021-10-11 00:27:49,705 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 00:27:49,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:27:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 00:27:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-10-11 00:27:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 00:27:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-11 00:27:49,710 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2021-10-11 00:27:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:49,710 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-11 00:27:49,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 00:27:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-11 00:27:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 00:27:49,711 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:49,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:49,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-11 00:27:49,926 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2021-10-11 00:27:49,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:49,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775385750] [2021-10-11 00:27:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:49,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:49,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:50,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775385750] [2021-10-11 00:27:50,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602825263] [2021-10-11 00:27:50,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:50,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-11 00:27:50,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:27:50,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:27:50,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:50,162 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_25|]} [2021-10-11 00:27:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 00:27:50,168 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-11 00:27:50,169 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:50,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:50,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 00:27:50,185 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-10-11 00:27:50,187 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:50,195 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:50,197 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 00:27:50,198 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2021-10-11 00:27:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-11 00:27:50,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:27:50,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-10-11 00:27:50,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922259404] [2021-10-11 00:27:50,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:27:50,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:50,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:27:50,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:27:50,418 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2021-10-11 00:27:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:50,479 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-10-11 00:27:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:27:50,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-10-11 00:27:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:50,481 INFO L225 Difference]: With dead ends: 50 [2021-10-11 00:27:50,481 INFO L226 Difference]: Without dead ends: 50 [2021-10-11 00:27:50,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:27:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-11 00:27:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-10-11 00:27:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-11 00:27:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-10-11 00:27:50,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2021-10-11 00:27:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:50,487 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-10-11 00:27:50,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:27:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-10-11 00:27:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-11 00:27:50,489 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:50,489 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:50,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:50,705 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:50,706 INFO L82 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2021-10-11 00:27:50,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:50,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957125351] [2021-10-11 00:27:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:50,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:50,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-11 00:27:50,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957125351] [2021-10-11 00:27:50,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200233370] [2021-10-11 00:27:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:50,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:27:50,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:27:51,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:51,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-10-11 00:27:51,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931726182] [2021-10-11 00:27:51,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 00:27:51,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:51,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:27:51,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:27:51,024 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2021-10-11 00:27:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:51,336 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-10-11 00:27:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 00:27:51,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2021-10-11 00:27:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:51,337 INFO L225 Difference]: With dead ends: 84 [2021-10-11 00:27:51,338 INFO L226 Difference]: Without dead ends: 81 [2021-10-11 00:27:51,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:27:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-11 00:27:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-10-11 00:27:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-10-11 00:27:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-11 00:27:51,343 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2021-10-11 00:27:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:51,343 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-11 00:27:51,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 00:27:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-11 00:27:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-11 00:27:51,346 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:51,346 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:51,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:51,574 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:51,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2021-10-11 00:27:51,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:51,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285997497] [2021-10-11 00:27:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:51,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:51,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:51,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-10-11 00:27:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-11 00:27:51,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285997497] [2021-10-11 00:27:51,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736280327] [2021-10-11 00:27:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:27:51,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 00:27:52,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:52,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-11 00:27:52,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328312052] [2021-10-11 00:27:52,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 00:27:52,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:52,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 00:27:52,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:27:52,161 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 15 states. [2021-10-11 00:27:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:52,594 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-10-11 00:27:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:27:52,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2021-10-11 00:27:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:52,596 INFO L225 Difference]: With dead ends: 72 [2021-10-11 00:27:52,596 INFO L226 Difference]: Without dead ends: 69 [2021-10-11 00:27:52,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-10-11 00:27:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-11 00:27:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2021-10-11 00:27:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-11 00:27:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-11 00:27:52,601 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2021-10-11 00:27:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:52,601 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-11 00:27:52,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 00:27:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-11 00:27:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-11 00:27:52,607 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:52,607 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:52,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 00:27:52,822 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2021-10-11 00:27:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:52,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092039331] [2021-10-11 00:27:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:52,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:52,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:53,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-11 00:27:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-11 00:27:53,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092039331] [2021-10-11 00:27:53,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717715989] [2021-10-11 00:27:53,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:53,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:27:53,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:27:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:27:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-11 00:27:53,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:53,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-11 00:27:53,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732771698] [2021-10-11 00:27:53,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-10-11 00:27:53,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-11 00:27:53,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-11 00:27:53,526 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 17 states. [2021-10-11 00:27:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:54,102 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-10-11 00:27:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 00:27:54,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2021-10-11 00:27:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:54,104 INFO L225 Difference]: With dead ends: 77 [2021-10-11 00:27:54,104 INFO L226 Difference]: Without dead ends: 74 [2021-10-11 00:27:54,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-10-11 00:27:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-11 00:27:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-10-11 00:27:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-10-11 00:27:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-11 00:27:54,110 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2021-10-11 00:27:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:54,110 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-11 00:27:54,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-10-11 00:27:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-11 00:27:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-11 00:27:54,113 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:54,113 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:54,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-11 00:27:54,338 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:54,339 INFO L82 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2021-10-11 00:27:54,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:54,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708735985] [2021-10-11 00:27:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:54,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:54,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:54,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-11 00:27:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-10-11 00:27:54,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708735985] [2021-10-11 00:27:54,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033952986] [2021-10-11 00:27:54,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:54,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 00:27:54,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:27:54,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:27:54,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:54,786 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_26|]} [2021-10-11 00:27:54,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 00:27:54,792 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-11 00:27:54,794 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:54,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:54,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 00:27:54,813 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-10-11 00:27:54,815 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:54,824 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:54,825 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 00:27:54,826 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2021-10-11 00:27:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-10-11 00:27:55,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:55,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 14 [2021-10-11 00:27:55,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228400463] [2021-10-11 00:27:55,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-10-11 00:27:55,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-11 00:27:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-11 00:27:55,428 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 14 states. [2021-10-11 00:27:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:56,218 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2021-10-11 00:27:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-11 00:27:56,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 86 [2021-10-11 00:27:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:56,219 INFO L225 Difference]: With dead ends: 87 [2021-10-11 00:27:56,220 INFO L226 Difference]: Without dead ends: 84 [2021-10-11 00:27:56,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-10-11 00:27:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-11 00:27:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-10-11 00:27:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-10-11 00:27:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-10-11 00:27:56,225 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2021-10-11 00:27:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:56,225 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-10-11 00:27:56,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-10-11 00:27:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-10-11 00:27:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-11 00:27:56,227 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:56,227 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:56,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-11 00:27:56,439 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2021-10-11 00:27:56,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:56,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581856248] [2021-10-11 00:27:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:56,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:56,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:56,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-11 00:27:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-10-11 00:27:56,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581856248] [2021-10-11 00:27:56,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433977661] [2021-10-11 00:27:56,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:56,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-11 00:27:56,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:27:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:27:56,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:56,705 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_27|]} [2021-10-11 00:27:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 00:27:56,714 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-11 00:27:56,715 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:56,729 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 00:27:56,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-10-11 00:27:56,736 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:56,744 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:56,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 00:27:56,745 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2021-10-11 00:27:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-10-11 00:27:57,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:27:57,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-11 00:27:57,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148325637] [2021-10-11 00:27:57,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:27:57,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:57,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:27:57,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:27:57,219 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 5 states. [2021-10-11 00:27:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:57,286 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-11 00:27:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:27:57,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2021-10-11 00:27:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:57,288 INFO L225 Difference]: With dead ends: 79 [2021-10-11 00:27:57,288 INFO L226 Difference]: Without dead ends: 79 [2021-10-11 00:27:57,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:27:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-11 00:27:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-10-11 00:27:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-10-11 00:27:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-10-11 00:27:57,296 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2021-10-11 00:27:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:57,296 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-10-11 00:27:57,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:27:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-10-11 00:27:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-11 00:27:57,298 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:57,299 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:57,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-11 00:27:57,514 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:57,514 INFO L82 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2021-10-11 00:27:57,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:57,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32431638] [2021-10-11 00:27:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:57,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:57,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:57,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-11 00:27:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-11 00:27:57,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32431638] [2021-10-11 00:27:57,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396637585] [2021-10-11 00:27:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:57,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:27:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-10-11 00:27:58,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:27:58,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-10-11 00:27:58,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942882237] [2021-10-11 00:27:58,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-10-11 00:27:58,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:27:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-11 00:27:58,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-10-11 00:27:58,246 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 21 states. [2021-10-11 00:27:58,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:27:58,879 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2021-10-11 00:27:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 00:27:58,879 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2021-10-11 00:27:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:27:58,880 INFO L225 Difference]: With dead ends: 90 [2021-10-11 00:27:58,880 INFO L226 Difference]: Without dead ends: 87 [2021-10-11 00:27:58,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-10-11 00:27:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-11 00:27:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-10-11 00:27:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-10-11 00:27:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-10-11 00:27:58,885 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2021-10-11 00:27:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:27:58,886 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-10-11 00:27:58,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-10-11 00:27:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-10-11 00:27:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-11 00:27:58,887 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:27:58,887 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:27:59,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-11 00:27:59,102 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:27:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:27:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2021-10-11 00:27:59,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:27:59,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065234928] [2021-10-11 00:27:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:27:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:59,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:27:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:59,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:27:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:59,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-11 00:27:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:27:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-11 00:27:59,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065234928] [2021-10-11 00:27:59,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366878682] [2021-10-11 00:27:59,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:27:59,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-11 00:27:59,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:27:59,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:27:59,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:27:59,578 INFO L348 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2021-10-11 00:27:59,578 INFO L382 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 3 case distinctions, treesize of input 24 treesize of output 29 [2021-10-11 00:27:59,582 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:59,589 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:59,593 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 00:27:59,594 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2021-10-11 00:27:59,979 INFO L348 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2021-10-11 00:27:59,979 INFO L382 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 3 case distinctions, treesize of input 24 treesize of output 29 [2021-10-11 00:27:59,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:27:59,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:27:59,990 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 00:27:59,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2021-10-11 00:28:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-10-11 00:28:00,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:28:00,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2021-10-11 00:28:00,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469824669] [2021-10-11 00:28:00,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:28:00,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:00,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:28:00,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-10-11 00:28:00,399 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 6 states. [2021-10-11 00:28:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:00,510 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-10-11 00:28:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:28:00,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2021-10-11 00:28:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:00,512 INFO L225 Difference]: With dead ends: 82 [2021-10-11 00:28:00,513 INFO L226 Difference]: Without dead ends: 79 [2021-10-11 00:28:00,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-11 00:28:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-11 00:28:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-10-11 00:28:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-10-11 00:28:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-10-11 00:28:00,518 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2021-10-11 00:28:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:00,518 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-10-11 00:28:00,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:28:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-10-11 00:28:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-11 00:28:00,520 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:00,520 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:00,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:00,734 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:28:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2021-10-11 00:28:00,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:00,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926540612] [2021-10-11 00:28:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:00,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:28:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:00,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:28:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:01,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-11 00:28:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-11 00:28:01,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926540612] [2021-10-11 00:28:01,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298098390] [2021-10-11 00:28:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:01,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 00:28:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-11 00:28:01,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:01,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-11 00:28:01,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925567244] [2021-10-11 00:28:01,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-10-11 00:28:01,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:01,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-11 00:28:01,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-11 00:28:01,534 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 23 states. [2021-10-11 00:28:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:02,191 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-10-11 00:28:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-11 00:28:02,198 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2021-10-11 00:28:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:02,199 INFO L225 Difference]: With dead ends: 88 [2021-10-11 00:28:02,200 INFO L226 Difference]: Without dead ends: 85 [2021-10-11 00:28:02,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2021-10-11 00:28:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-11 00:28:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-10-11 00:28:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-10-11 00:28:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-10-11 00:28:02,205 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2021-10-11 00:28:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:02,206 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-10-11 00:28:02,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-10-11 00:28:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-10-11 00:28:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-10-11 00:28:02,208 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:02,208 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:02,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:02,414 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:28:02,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:02,414 INFO L82 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2021-10-11 00:28:02,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:02,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733834126] [2021-10-11 00:28:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:02,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:28:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:02,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:28:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:02,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-11 00:28:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-10-11 00:28:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733834126] [2021-10-11 00:28:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456981777] [2021-10-11 00:28:02,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:02,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:28:02,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:28:02,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 00:28:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-10-11 00:28:03,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:03,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-10-11 00:28:03,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286605340] [2021-10-11 00:28:03,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-10-11 00:28:03,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:03,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-11 00:28:03,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-10-11 00:28:03,329 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 25 states. [2021-10-11 00:28:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:04,143 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-10-11 00:28:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-11 00:28:04,143 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2021-10-11 00:28:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:04,144 INFO L225 Difference]: With dead ends: 93 [2021-10-11 00:28:04,144 INFO L226 Difference]: Without dead ends: 90 [2021-10-11 00:28:04,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2021-10-11 00:28:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-11 00:28:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-10-11 00:28:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-10-11 00:28:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-10-11 00:28:04,150 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2021-10-11 00:28:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:04,150 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-10-11 00:28:04,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-10-11 00:28:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-10-11 00:28:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-11 00:28:04,152 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:04,152 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:04,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-11 00:28:04,366 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:28:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2021-10-11 00:28:04,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:04,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910381333] [2021-10-11 00:28:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:04,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:28:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:04,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:28:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:04,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-11 00:28:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-10-11 00:28:04,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910381333] [2021-10-11 00:28:04,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128201208] [2021-10-11 00:28:04,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:04,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 00:28:04,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:28:04,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:28:04,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2021-10-11 00:28:05,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:05,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2021-10-11 00:28:05,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898890240] [2021-10-11 00:28:05,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-10-11 00:28:05,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:05,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-11 00:28:05,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-10-11 00:28:05,124 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2021-10-11 00:28:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:05,912 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-10-11 00:28:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-11 00:28:05,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2021-10-11 00:28:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:05,913 INFO L225 Difference]: With dead ends: 109 [2021-10-11 00:28:05,913 INFO L226 Difference]: Without dead ends: 106 [2021-10-11 00:28:05,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-10-11 00:28:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-11 00:28:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2021-10-11 00:28:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-10-11 00:28:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-10-11 00:28:05,918 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2021-10-11 00:28:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:05,918 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-10-11 00:28:05,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-10-11 00:28:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-10-11 00:28:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-10-11 00:28:05,920 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:05,920 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:06,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:06,146 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:28:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2021-10-11 00:28:06,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:06,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098124700] [2021-10-11 00:28:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:06,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:28:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:06,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:28:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:06,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-11 00:28:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-10-11 00:28:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098124700] [2021-10-11 00:28:06,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995634698] [2021-10-11 00:28:06,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:06,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:28:06,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:28:06,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:28:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-10-11 00:28:07,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:07,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-10-11 00:28:07,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214461709] [2021-10-11 00:28:07,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-10-11 00:28:07,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-11 00:28:07,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-10-11 00:28:07,249 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 29 states. [2021-10-11 00:28:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:08,071 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-10-11 00:28:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 00:28:08,071 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2021-10-11 00:28:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:08,072 INFO L225 Difference]: With dead ends: 107 [2021-10-11 00:28:08,072 INFO L226 Difference]: Without dead ends: 104 [2021-10-11 00:28:08,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-10-11 00:28:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-11 00:28:08,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-10-11 00:28:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-10-11 00:28:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-10-11 00:28:08,077 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2021-10-11 00:28:08,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:08,078 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-10-11 00:28:08,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-10-11 00:28:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-10-11 00:28:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-11 00:28:08,080 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:08,080 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:08,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-11 00:28:08,294 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:28:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:08,294 INFO L82 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2021-10-11 00:28:08,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:08,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056018609] [2021-10-11 00:28:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:08,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:28:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:08,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:28:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:08,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-11 00:28:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-10-11 00:28:08,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056018609] [2021-10-11 00:28:08,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580614573] [2021-10-11 00:28:08,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:08,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-11 00:28:08,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:28:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-11 00:28:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-10-11 00:28:09,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:09,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-10-11 00:28:09,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674424834] [2021-10-11 00:28:09,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-10-11 00:28:09,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:09,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-11 00:28:09,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-10-11 00:28:09,476 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 31 states. [2021-10-11 00:28:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:10,391 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-10-11 00:28:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 00:28:10,392 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2021-10-11 00:28:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:10,393 INFO L225 Difference]: With dead ends: 112 [2021-10-11 00:28:10,393 INFO L226 Difference]: Without dead ends: 109 [2021-10-11 00:28:10,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-10-11 00:28:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-11 00:28:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-10-11 00:28:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-10-11 00:28:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-10-11 00:28:10,398 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2021-10-11 00:28:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:10,398 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-10-11 00:28:10,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-10-11 00:28:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-10-11 00:28:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-11 00:28:10,400 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:10,401 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:10,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-11 00:28:10,614 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:28:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2021-10-11 00:28:10,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:10,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130563241] [2021-10-11 00:28:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:10,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:28:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:10,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:28:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:11,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-10-11 00:28:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2021-10-11 00:28:11,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130563241] [2021-10-11 00:28:11,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561923121] [2021-10-11 00:28:11,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:11,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-11 00:28:11,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:28:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:28:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:11,257 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_30|]} [2021-10-11 00:28:11,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 00:28:11,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-11 00:28:11,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:28:11,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:28:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 00:28:11,276 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-10-11 00:28:11,277 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 00:28:11,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:28:11,285 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 00:28:11,285 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2021-10-11 00:28:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2021-10-11 00:28:11,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:28:11,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2021-10-11 00:28:11,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055809318] [2021-10-11 00:28:11,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:28:11,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:11,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:28:11,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-11 00:28:11,954 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 7 states. [2021-10-11 00:28:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:12,004 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-10-11 00:28:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:28:12,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2021-10-11 00:28:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:12,006 INFO L225 Difference]: With dead ends: 103 [2021-10-11 00:28:12,006 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 00:28:12,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-11 00:28:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 00:28:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 00:28:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 00:28:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:28:12,007 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-10-11 00:28:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:12,007 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:28:12,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:28:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:28:12,007 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 00:28:12,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-11 00:28:12,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:28:12 BoogieIcfgContainer [2021-10-11 00:28:12,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:28:12,219 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:28:12,219 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:28:12,219 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:28:12,219 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:27:43" (3/4) ... [2021-10-11 00:28:12,223 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 00:28:12,231 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-11 00:28:12,231 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-10-11 00:28:12,232 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-11 00:28:12,239 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-11 00:28:12,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-11 00:28:12,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 00:28:12,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:28:12,271 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e814a7ab-060d-4f85-9211-745f224826f5/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:28:12,271 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:28:12,272 INFO L168 Benchmark]: Toolchain (without parser) took 29753.57 ms. Allocated memory was 92.3 MB in the beginning and 281.0 MB in the end (delta: 188.7 MB). Free memory was 58.2 MB in the beginning and 96.3 MB in the end (delta: -38.1 MB). Peak memory consumption was 153.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:12,272 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 92.3 MB. Free memory is still 60.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:28:12,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.00 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 49.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:12,273 INFO L168 Benchmark]: Boogie Preprocessor took 42.18 ms. Allocated memory is still 92.3 MB. Free memory was 48.9 MB in the beginning and 47.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:28:12,273 INFO L168 Benchmark]: RCFGBuilder took 570.24 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 47.4 MB in the beginning and 90.2 MB in the end (delta: -42.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:12,274 INFO L168 Benchmark]: TraceAbstraction took 28848.09 ms. Allocated memory was 121.6 MB in the beginning and 281.0 MB in the end (delta: 159.4 MB). Free memory was 89.4 MB in the beginning and 99.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 151.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:12,274 INFO L168 Benchmark]: Witness Printer took 52.30 ms. Allocated memory is still 281.0 MB. Free memory was 99.1 MB in the beginning and 96.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:12,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 92.3 MB. Free memory is still 60.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 234.00 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 49.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.18 ms. Allocated memory is still 92.3 MB. Free memory was 48.9 MB in the beginning and 47.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 570.24 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 47.4 MB in the beginning and 90.2 MB in the end (delta: -42.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28848.09 ms. Allocated memory was 121.6 MB in the beginning and 281.0 MB in the end (delta: 159.4 MB). Free memory was 89.4 MB in the beginning and 99.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 151.1 MB. Max. memory is 16.1 GB. * Witness Printer took 52.30 ms. Allocated memory is still 281.0 MB. Free memory was 99.1 MB in the beginning and 96.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.7s, OverallIterations: 25, TraceHistogramMax: 26, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 621 SDtfs, 1815 SDslu, 3418 SDs, 0 SdLazy, 3353 SolverSat, 268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1981 GetRequests, 1548 SyntacticMatches, 16 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 470 QuantifiedInterpolants, 2353130 SizeOfPredicates, 28 NumberOfNonLiveVariables, 3127 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 10775/18637 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...