./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer --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 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:11:50,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:11:50,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:11:50,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:11:50,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:11:50,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:11:50,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:11:50,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:11:50,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:11:50,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:11:50,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:11:50,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:11:50,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:11:50,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:11:50,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:11:50,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:11:50,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:11:50,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:11:50,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:11:50,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:11:50,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:11:50,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:11:50,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:11:50,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:11:50,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:11:50,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:11:50,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:11:50,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:11:50,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:11:50,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:11:50,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:11:50,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:11:50,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:11:50,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:11:50,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:11:50,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:11:50,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:11:50,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:11:50,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:11:50,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:11:50,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:11:50,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:11:50,752 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:11:50,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:11:50,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:11:50,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:11:50,754 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:11:50,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:11:50,754 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:11:50,755 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:11:50,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:11:50,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:11:50,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:11:50,756 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:11:50,756 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:11:50,756 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:11:50,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:11:50,757 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:11:50,757 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:11:50,757 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:11:50,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:11:50,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:11:50,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:11:50,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:11:50,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:11:50,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:11:50,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:11:50,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:11:50,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:11:50,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:11:50,760 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-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2020-11-28 03:11:51,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:11:51,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:11:51,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:11:51,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:11:51,100 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:11:51,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-11-28 03:11:51,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/data/d0efef87c/78bbae18be6342ffbdbb923b30156ed8/FLAG72834be95 [2020-11-28 03:11:51,700 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:11:51,700 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-11-28 03:11:51,718 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/data/d0efef87c/78bbae18be6342ffbdbb923b30156ed8/FLAG72834be95 [2020-11-28 03:11:51,999 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/data/d0efef87c/78bbae18be6342ffbdbb923b30156ed8 [2020-11-28 03:11:52,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:11:52,003 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:11:52,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:52,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:11:52,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:11:52,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e25870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52, skipping insertion in model container [2020-11-28 03:11:52,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:11:52,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:11:52,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:52,447 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:11:52,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:52,542 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:11:52,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52 WrapperNode [2020-11-28 03:11:52,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:52,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:11:52,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:11:52,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:11:52,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:11:52,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:11:52,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:11:52,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:11:52,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:11:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:11:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:11:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-28 03:11:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-28 03:11:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-28 03:11:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-28 03:11:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-28 03:11:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrnlen [2020-11-28 03:11:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:11:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-28 03:11:52,716 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-28 03:11:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-28 03:11:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-28 03:11:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-28 03:11:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-28 03:11:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-28 03:11:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-28 03:11:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-28 03:11:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-28 03:11:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-28 03:11:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-28 03:11:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-28 03:11:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-28 03:11:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-28 03:11:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-28 03:11:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-28 03:11:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-28 03:11:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-28 03:11:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-28 03:11:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-28 03:11:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-28 03:11:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-28 03:11:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-28 03:11:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-28 03:11:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-28 03:11:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-28 03:11:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-28 03:11:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-28 03:11:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-28 03:11:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-28 03:11:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-28 03:11:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-28 03:11:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-28 03:11:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-28 03:11:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-28 03:11:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-28 03:11:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-28 03:11:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-28 03:11:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-28 03:11:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-28 03:11:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-28 03:11:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-28 03:11:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-28 03:11:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-28 03:11:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-28 03:11:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-28 03:11:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-28 03:11:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-28 03:11:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-28 03:11:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-28 03:11:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-28 03:11:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-28 03:11:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-28 03:11:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-28 03:11:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-28 03:11:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-28 03:11:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-28 03:11:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-28 03:11:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-28 03:11:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-28 03:11:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-28 03:11:52,729 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-28 03:11:52,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 03:11:52,730 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-28 03:11:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-28 03:11:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-28 03:11:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-28 03:11:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-28 03:11:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-28 03:11:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-28 03:11:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-28 03:11:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-28 03:11:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-28 03:11:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-28 03:11:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-28 03:11:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-28 03:11:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-28 03:11:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-28 03:11:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-28 03:11:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-28 03:11:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-28 03:11:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-28 03:11:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-28 03:11:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-28 03:11:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-28 03:11:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-28 03:11:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-28 03:11:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-28 03:11:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-28 03:11:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-28 03:11:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-28 03:11:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-28 03:11:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-28 03:11:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-28 03:11:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-28 03:11:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-28 03:11:52,736 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-28 03:11:52,736 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-28 03:11:52,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:11:52,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-28 03:11:52,737 INFO L130 BoogieDeclarations]: Found specification of procedure cstrnlen [2020-11-28 03:11:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:11:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:11:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:11:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:11:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:11:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:11:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:11:53,403 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:11:53,403 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-28 03:11:53,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:53 BoogieIcfgContainer [2020-11-28 03:11:53,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:11:53,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:11:53,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:11:53,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:11:53,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:11:52" (1/3) ... [2020-11-28 03:11:53,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164ed571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:11:53, skipping insertion in model container [2020-11-28 03:11:53,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52" (2/3) ... [2020-11-28 03:11:53,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164ed571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:11:53, skipping insertion in model container [2020-11-28 03:11:53,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:53" (3/3) ... [2020-11-28 03:11:53,422 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2020-11-28 03:11:53,434 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:11:53,441 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 03:11:53,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 03:11:53,486 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:11:53,486 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:11:53,490 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:11:53,491 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:11:53,491 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:11:53,491 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:11:53,491 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:11:53,491 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:11:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-11-28 03:11:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:11:53,521 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:53,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:53,522 INFO L429 AbstractCegarLoop]: === Iteration 1 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:53,531 INFO L82 PathProgramCache]: Analyzing trace with hash 787746653, now seen corresponding path program 1 times [2020-11-28 03:11:53,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:53,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88975911] [2020-11-28 03:11:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:53,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:53,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88975911] [2020-11-28 03:11:53,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:53,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:11:53,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654201014] [2020-11-28 03:11:53,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:11:53,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:53,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:11:53,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:11:53,764 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-11-28 03:11:53,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:53,854 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-28 03:11:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:11:53,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-28 03:11:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:53,864 INFO L225 Difference]: With dead ends: 37 [2020-11-28 03:11:53,864 INFO L226 Difference]: Without dead ends: 34 [2020-11-28 03:11:53,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:11:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-28 03:11:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-28 03:11:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 03:11:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-28 03:11:53,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2020-11-28 03:11:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:53,919 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-28 03:11:53,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:11:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-28 03:11:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:11:53,920 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:53,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:53,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:11:53,921 INFO L429 AbstractCegarLoop]: === Iteration 2 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:53,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash 787746343, now seen corresponding path program 1 times [2020-11-28 03:11:53,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:53,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793440193] [2020-11-28 03:11:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:54,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793440193] [2020-11-28 03:11:54,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:54,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:11:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000711314] [2020-11-28 03:11:54,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:11:54,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:54,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:11:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:11:54,045 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-11-28 03:11:54,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:54,168 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-28 03:11:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:11:54,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:11:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:54,170 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:11:54,170 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:11:54,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:11:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:11:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-28 03:11:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-28 03:11:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-28 03:11:54,175 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2020-11-28 03:11:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:54,176 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-28 03:11:54,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:11:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-28 03:11:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:11:54,176 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:54,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:54,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:11:54,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash 787746344, now seen corresponding path program 1 times [2020-11-28 03:11:54,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:54,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387738757] [2020-11-28 03:11:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:54,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387738757] [2020-11-28 03:11:54,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:54,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:54,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665596362] [2020-11-28 03:11:54,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:11:54,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:54,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:54,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:54,305 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-11-28 03:11:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:54,418 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-11-28 03:11:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:11:54,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:11:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:54,419 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:11:54,419 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 03:11:54,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 03:11:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-28 03:11:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-28 03:11:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-28 03:11:54,424 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 11 [2020-11-28 03:11:54,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:54,424 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-28 03:11:54,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:11:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-28 03:11:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:11:54,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:54,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:54,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:11:54,427 INFO L429 AbstractCegarLoop]: === Iteration 4 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:54,427 INFO L82 PathProgramCache]: Analyzing trace with hash 787746397, now seen corresponding path program 1 times [2020-11-28 03:11:54,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:54,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992873932] [2020-11-28 03:11:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:54,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992873932] [2020-11-28 03:11:54,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:54,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:11:54,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720621959] [2020-11-28 03:11:54,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:11:54,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:54,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:54,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:54,513 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-11-28 03:11:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:54,621 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-28 03:11:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:11:54,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:11:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:54,623 INFO L225 Difference]: With dead ends: 39 [2020-11-28 03:11:54,624 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 03:11:54,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 03:11:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-11-28 03:11:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 03:11:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-28 03:11:54,632 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2020-11-28 03:11:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:54,635 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-28 03:11:54,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:11:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-28 03:11:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:11:54,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:54,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:54,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:11:54,636 INFO L429 AbstractCegarLoop]: === Iteration 5 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash 789593439, now seen corresponding path program 1 times [2020-11-28 03:11:54,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:54,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38031486] [2020-11-28 03:11:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:54,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38031486] [2020-11-28 03:11:54,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:54,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:54,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202372339] [2020-11-28 03:11:54,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:11:54,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:54,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:54,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:54,730 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-11-28 03:11:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:54,904 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-11-28 03:11:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:11:54,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:11:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:54,906 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:11:54,906 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 03:11:54,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:11:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 03:11:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-11-28 03:11:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 03:11:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-11-28 03:11:54,911 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2020-11-28 03:11:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:54,911 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-11-28 03:11:54,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:11:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-11-28 03:11:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:11:54,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:54,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:54,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:11:54,916 INFO L429 AbstractCegarLoop]: === Iteration 6 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:54,916 INFO L82 PathProgramCache]: Analyzing trace with hash 849748688, now seen corresponding path program 1 times [2020-11-28 03:11:54,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:54,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994500518] [2020-11-28 03:11:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:55,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994500518] [2020-11-28 03:11:55,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:55,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:11:55,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230840081] [2020-11-28 03:11:55,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:11:55,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:11:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:55,002 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-11-28 03:11:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:55,157 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-11-28 03:11:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:11:55,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-28 03:11:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:55,162 INFO L225 Difference]: With dead ends: 35 [2020-11-28 03:11:55,162 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 03:11:55,163 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 [2020-11-28 03:11:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 03:11:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-28 03:11:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 03:11:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-28 03:11:55,167 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2020-11-28 03:11:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:55,167 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-28 03:11:55,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:11:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-28 03:11:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:11:55,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:55,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:55,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:11:55,173 INFO L429 AbstractCegarLoop]: === Iteration 7 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 849748689, now seen corresponding path program 1 times [2020-11-28 03:11:55,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:55,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4194095] [2020-11-28 03:11:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:55,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4194095] [2020-11-28 03:11:55,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:55,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-28 03:11:55,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017059291] [2020-11-28 03:11:55,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:55,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:55,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:11:55,321 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2020-11-28 03:11:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:55,617 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-11-28 03:11:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:11:55,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-28 03:11:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:55,620 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:11:55,620 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 03:11:55,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:11:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 03:11:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-11-28 03:11:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 03:11:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-11-28 03:11:55,625 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2020-11-28 03:11:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:55,625 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-11-28 03:11:55,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-11-28 03:11:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:11:55,626 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:55,626 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:55,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:11:55,627 INFO L429 AbstractCegarLoop]: === Iteration 8 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:55,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2015068958, now seen corresponding path program 1 times [2020-11-28 03:11:55,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:55,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113912561] [2020-11-28 03:11:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113912561] [2020-11-28 03:11:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694736749] [2020-11-28 03:11:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:11:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:11:55,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:56,000 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:11:56,000 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:11:56,035 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:11:56,035 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:11:56,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 03:11:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:56,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:56,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-28 03:11:56,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918514650] [2020-11-28 03:11:56,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:11:56,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:11:56,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:11:56,126 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2020-11-28 03:11:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:56,361 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-11-28 03:11:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:11:56,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-28 03:11:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:56,364 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:11:56,364 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 03:11:56,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:11:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 03:11:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-11-28 03:11:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 03:11:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-28 03:11:56,376 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2020-11-28 03:11:56,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:56,377 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-28 03:11:56,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:11:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-28 03:11:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:11:56,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:56,379 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:56,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-28 03:11:56,580 INFO L429 AbstractCegarLoop]: === Iteration 9 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:56,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:56,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1695397446, now seen corresponding path program 1 times [2020-11-28 03:11:56,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:56,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052968912] [2020-11-28 03:11:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:56,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:56,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052968912] [2020-11-28 03:11:56,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:56,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:56,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361886645] [2020-11-28 03:11:56,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:11:56,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:56,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:11:56,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:11:56,633 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-11-28 03:11:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:56,725 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-11-28 03:11:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:11:56,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 03:11:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:56,727 INFO L225 Difference]: With dead ends: 36 [2020-11-28 03:11:56,727 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 03:11:56,727 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 [2020-11-28 03:11:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 03:11:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-28 03:11:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 03:11:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-11-28 03:11:56,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2020-11-28 03:11:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:56,731 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-11-28 03:11:56,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:11:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-11-28 03:11:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:11:56,732 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:56,733 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, 1] [2020-11-28 03:11:56,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 03:11:56,734 INFO L429 AbstractCegarLoop]: === Iteration 10 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:56,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:56,734 INFO L82 PathProgramCache]: Analyzing trace with hash 964873536, now seen corresponding path program 1 times [2020-11-28 03:11:56,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:56,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061621160] [2020-11-28 03:11:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:56,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:56,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-28 03:11:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:56,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061621160] [2020-11-28 03:11:56,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:56,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-28 03:11:56,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289664080] [2020-11-28 03:11:56,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:11:56,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:11:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:11:56,865 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2020-11-28 03:11:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:57,108 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-11-28 03:11:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:11:57,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-28 03:11:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:57,110 INFO L225 Difference]: With dead ends: 58 [2020-11-28 03:11:57,111 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 03:11:57,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:11:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 03:11:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-11-28 03:11:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 03:11:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-28 03:11:57,119 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 21 [2020-11-28 03:11:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:57,119 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-28 03:11:57,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:11:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-28 03:11:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:11:57,129 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:57,129 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, 1] [2020-11-28 03:11:57,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:11:57,129 INFO L429 AbstractCegarLoop]: === Iteration 11 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash -46243714, now seen corresponding path program 1 times [2020-11-28 03:11:57,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:57,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710878423] [2020-11-28 03:11:57,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:57,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:57,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-28 03:11:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:57,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710878423] [2020-11-28 03:11:57,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:57,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-28 03:11:57,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056338422] [2020-11-28 03:11:57,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:57,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:57,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:57,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:11:57,284 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2020-11-28 03:11:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:57,510 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-11-28 03:11:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:11:57,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-28 03:11:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:57,512 INFO L225 Difference]: With dead ends: 55 [2020-11-28 03:11:57,512 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 03:11:57,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:11:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 03:11:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2020-11-28 03:11:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 03:11:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-11-28 03:11:57,516 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2020-11-28 03:11:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:57,517 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-28 03:11:57,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-11-28 03:11:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:11:57,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:57,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:57,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 03:11:57,518 INFO L429 AbstractCegarLoop]: === Iteration 12 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1827219927, now seen corresponding path program 1 times [2020-11-28 03:11:57,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:57,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651930096] [2020-11-28 03:11:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:57,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:57,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651930096] [2020-11-28 03:11:57,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029458209] [2020-11-28 03:11:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:11:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:11:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:57,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:11:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:57,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:57,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-28 03:11:57,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788826557] [2020-11-28 03:11:57,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:11:57,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:57,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:11:57,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:57,906 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-11-28 03:11:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:58,230 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-11-28 03:11:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:11:58,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-11-28 03:11:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:58,232 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:11:58,232 INFO L226 Difference]: Without dead ends: 64 [2020-11-28 03:11:58,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:11:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-28 03:11:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-11-28 03:11:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 03:11:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-11-28 03:11:58,247 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 22 [2020-11-28 03:11:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:58,248 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-11-28 03:11:58,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:11:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-11-28 03:11:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:11:58,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:58,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:58,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 03:11:58,465 INFO L429 AbstractCegarLoop]: === Iteration 13 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:58,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1187883691, now seen corresponding path program 1 times [2020-11-28 03:11:58,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:58,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198011828] [2020-11-28 03:11:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:58,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:58,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198011828] [2020-11-28 03:11:58,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:58,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-28 03:11:58,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618697838] [2020-11-28 03:11:58,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:11:58,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:58,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:11:58,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:58,656 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 10 states. [2020-11-28 03:11:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:58,946 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-11-28 03:11:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:11:58,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-11-28 03:11:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:58,948 INFO L225 Difference]: With dead ends: 83 [2020-11-28 03:11:58,948 INFO L226 Difference]: Without dead ends: 83 [2020-11-28 03:11:58,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:11:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-28 03:11:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-28 03:11:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-28 03:11:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-11-28 03:11:58,957 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 22 [2020-11-28 03:11:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:58,957 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-11-28 03:11:58,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:11:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-11-28 03:11:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:11:58,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:58,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:58,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 03:11:58,959 INFO L429 AbstractCegarLoop]: === Iteration 14 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:58,960 INFO L82 PathProgramCache]: Analyzing trace with hash 166815337, now seen corresponding path program 1 times [2020-11-28 03:11:58,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:58,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574989518] [2020-11-28 03:11:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:59,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:59,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574989518] [2020-11-28 03:11:59,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:59,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-28 03:11:59,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033199693] [2020-11-28 03:11:59,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:11:59,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:59,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:11:59,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:11:59,165 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 11 states. [2020-11-28 03:11:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:59,511 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-11-28 03:11:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:11:59,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-11-28 03:11:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:59,513 INFO L225 Difference]: With dead ends: 100 [2020-11-28 03:11:59,513 INFO L226 Difference]: Without dead ends: 100 [2020-11-28 03:11:59,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:11:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-28 03:11:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2020-11-28 03:11:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-28 03:11:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-11-28 03:11:59,521 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 22 [2020-11-28 03:11:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:59,521 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-11-28 03:11:59,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:11:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-11-28 03:11:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:11:59,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:59,523 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, 1, 1, 1] [2020-11-28 03:11:59,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:11:59,523 INFO L429 AbstractCegarLoop]: === Iteration 15 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash -862082627, now seen corresponding path program 1 times [2020-11-28 03:11:59,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:59,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201026225] [2020-11-28 03:11:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:59,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:59,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-28 03:11:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:59,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201026225] [2020-11-28 03:11:59,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:59,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:59,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285121311] [2020-11-28 03:11:59,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:11:59,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:59,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:59,598 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 5 states. [2020-11-28 03:11:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:59,670 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-11-28 03:11:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:11:59,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-11-28 03:11:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:59,671 INFO L225 Difference]: With dead ends: 68 [2020-11-28 03:11:59,671 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 03:11:59,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 03:11:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 03:11:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:11:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-28 03:11:59,674 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2020-11-28 03:11:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:59,674 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-28 03:11:59,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:11:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-28 03:11:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:11:59,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:59,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:59,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-28 03:11:59,675 INFO L429 AbstractCegarLoop]: === Iteration 16 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:11:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:59,676 INFO L82 PathProgramCache]: Analyzing trace with hash 869619206, now seen corresponding path program 1 times [2020-11-28 03:11:59,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:59,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151784267] [2020-11-28 03:11:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:59,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:11:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:59,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151784267] [2020-11-28 03:11:59,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141554938] [2020-11-28 03:11:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:11:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:59,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:11:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:12:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:00,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:12:00,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-28 03:12:00,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239181183] [2020-11-28 03:12:00,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:12:00,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:12:00,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:12:00,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:12:00,091 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-11-28 03:12:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:12:00,362 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-11-28 03:12:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:12:00,363 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-11-28 03:12:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:12:00,364 INFO L225 Difference]: With dead ends: 39 [2020-11-28 03:12:00,364 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 03:12:00,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:12:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 03:12:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-11-28 03:12:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 03:12:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-28 03:12:00,368 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-11-28 03:12:00,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:12:00,368 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-28 03:12:00,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:12:00,368 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-28 03:12:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:12:00,369 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:12:00,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:12:00,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:12:00,581 INFO L429 AbstractCegarLoop]: === Iteration 17 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:12:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:12:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2038559330, now seen corresponding path program 2 times [2020-11-28 03:12:00,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:12:00,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260421846] [2020-11-28 03:12:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:12:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:12:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:00,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260421846] [2020-11-28 03:12:00,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681167914] [2020-11-28 03:12:00,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:12:01,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:12:01,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:12:01,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-28 03:12:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:12:01,110 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-28 03:12:01,111 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:12:01,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:01,120 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:12:01,120 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-28 03:12:01,390 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:01,390 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-11-28 03:12:01,391 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-28 03:12:01,401 INFO L625 ElimStorePlain]: treesize reduction 8, result has 55.6 percent of original size [2020-11-28 03:12:01,403 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:12:01,404 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-11-28 03:12:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:01,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:12:01,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2020-11-28 03:12:01,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735412732] [2020-11-28 03:12:01,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-28 03:12:01,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:12:01,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-28 03:12:01,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:12:01,411 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 21 states. [2020-11-28 03:12:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:12:01,944 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-11-28 03:12:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:12:01,945 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-11-28 03:12:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:12:01,945 INFO L225 Difference]: With dead ends: 54 [2020-11-28 03:12:01,946 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 03:12:01,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-11-28 03:12:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 03:12:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-11-28 03:12:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 03:12:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-11-28 03:12:01,949 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-11-28 03:12:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:12:01,949 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-11-28 03:12:01,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-28 03:12:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-11-28 03:12:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 03:12:01,951 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:12:01,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:12:02,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:12:02,161 INFO L429 AbstractCegarLoop]: === Iteration 18 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:12:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:12:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1010508549, now seen corresponding path program 3 times [2020-11-28 03:12:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:12:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392796370] [2020-11-28 03:12:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:12:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:02,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:12:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:02,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392796370] [2020-11-28 03:12:02,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390291160] [2020-11-28 03:12:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:12:02,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 03:12:02,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:12:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:12:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:12:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:02,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:12:02,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-11-28 03:12:02,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014854934] [2020-11-28 03:12:02,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-28 03:12:02,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:12:02,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-28 03:12:02,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:12:02,666 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2020-11-28 03:12:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:12:03,070 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-28 03:12:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:12:03,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-11-28 03:12:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:12:03,071 INFO L225 Difference]: With dead ends: 46 [2020-11-28 03:12:03,071 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 03:12:03,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:12:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 03:12:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-28 03:12:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 03:12:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-28 03:12:03,074 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 36 [2020-11-28 03:12:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:12:03,075 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-28 03:12:03,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-28 03:12:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-28 03:12:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-28 03:12:03,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:12:03,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:12:03,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:12:03,293 INFO L429 AbstractCegarLoop]: === Iteration 19 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:12:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:12:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1250412755, now seen corresponding path program 4 times [2020-11-28 03:12:03,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:12:03,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400040687] [2020-11-28 03:12:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:12:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:03,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:12:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:03,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400040687] [2020-11-28 03:12:03,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847235333] [2020-11-28 03:12:03,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:12:03,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:12:03,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:12:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-28 03:12:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:12:03,744 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:12:03,744 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:12:03,754 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:03,754 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:12:03,754 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 03:12:03,938 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-11-28 03:12:03,939 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:12:03,944 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:03,945 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:12:03,945 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-11-28 03:12:04,195 INFO L384 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 24 treesize of output 18 [2020-11-28 03:12:04,197 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:12:04,208 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:04,212 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-28 03:12:04,214 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:04,214 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-11-28 03:12:04,215 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:12:04,234 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:04,253 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:12:04,253 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-11-28 03:12:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:04,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:12:04,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2020-11-28 03:12:04,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885776614] [2020-11-28 03:12:04,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-28 03:12:04,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:12:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-28 03:12:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:12:04,269 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 25 states. [2020-11-28 03:12:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:12:05,138 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-28 03:12:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:12:05,139 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2020-11-28 03:12:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:12:05,139 INFO L225 Difference]: With dead ends: 70 [2020-11-28 03:12:05,140 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:12:05,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2020-11-28 03:12:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:12:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-28 03:12:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 03:12:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-11-28 03:12:05,143 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2020-11-28 03:12:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:12:05,143 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-11-28 03:12:05,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-28 03:12:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-11-28 03:12:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 03:12:05,144 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:12:05,144 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:12:05,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:12:05,345 INFO L429 AbstractCegarLoop]: === Iteration 20 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:12:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:12:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash 736937968, now seen corresponding path program 5 times [2020-11-28 03:12:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:12:05,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974558799] [2020-11-28 03:12:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:12:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:05,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:12:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:05,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974558799] [2020-11-28 03:12:05,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168541402] [2020-11-28 03:12:05,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:12:05,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-28 03:12:05,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:12:05,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-28 03:12:05,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:12:05,819 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:12:05,819 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:12:05,824 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:05,825 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:12:05,825 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 03:12:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:05,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:12:05,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2020-11-28 03:12:05,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872116031] [2020-11-28 03:12:05,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 03:12:05,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:12:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 03:12:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:12:05,954 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 16 states. [2020-11-28 03:12:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:12:06,410 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-11-28 03:12:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:12:06,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-11-28 03:12:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:12:06,411 INFO L225 Difference]: With dead ends: 56 [2020-11-28 03:12:06,411 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 03:12:06,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:12:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 03:12:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-28 03:12:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-28 03:12:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-11-28 03:12:06,414 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 46 [2020-11-28 03:12:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:12:06,415 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-11-28 03:12:06,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 03:12:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-11-28 03:12:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-28 03:12:06,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:12:06,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:12:06,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:12:06,633 INFO L429 AbstractCegarLoop]: === Iteration 21 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:12:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:12:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash -873535480, now seen corresponding path program 6 times [2020-11-28 03:12:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:12:06,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299265695] [2020-11-28 03:12:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:12:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:06,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:12:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:12:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:12:06,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299265695] [2020-11-28 03:12:06,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005446377] [2020-11-28 03:12:06,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/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 [2020-11-28 03:12:07,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-28 03:12:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:12:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-28 03:12:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:12:07,087 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:12:07,087 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:12:07,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:07,106 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:12:07,106 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-28 03:12:07,138 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-11-28 03:12:07,138 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:12:07,140 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:07,140 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:12:07,141 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-11-28 03:12:07,230 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:07,230 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-28 03:12:07,231 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-28 03:12:07,242 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:12:07,243 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:12:07,243 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2020-11-28 03:12:07,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:12:07,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:12:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-28 03:12:07,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:12:07,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 25 [2020-11-28 03:12:07,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080818407] [2020-11-28 03:12:07,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-28 03:12:07,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:12:07,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-28 03:12:07,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:12:07,393 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 25 states. [2020-11-28 03:12:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:12:10,010 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-11-28 03:12:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-28 03:12:10,010 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-11-28 03:12:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:12:10,011 INFO L225 Difference]: With dead ends: 85 [2020-11-28 03:12:10,011 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:12:10,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=443, Invalid=2863, Unknown=0, NotChecked=0, Total=3306 [2020-11-28 03:12:10,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:12:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:12:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:12:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:12:10,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-11-28 03:12:10,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:12:10,013 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:12:10,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-28 03:12:10,013 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:12:10,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:12:10,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-28 03:12:10,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:12:10 BoogieIcfgContainer [2020-11-28 03:12:10,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:12:10,218 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:12:10,218 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:12:10,218 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:12:10,218 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:53" (3/4) ... [2020-11-28 03:12:10,229 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:12:10,239 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:12:10,239 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2020-11-28 03:12:10,239 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrnlen [2020-11-28 03:12:10,239 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2020-11-28 03:12:10,239 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2020-11-28 03:12:10,240 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2020-11-28 03:12:10,240 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:12:10,240 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2020-11-28 03:12:10,245 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-28 03:12:10,246 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-28 03:12:10,246 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:12:10,246 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:12:10,285 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4509c4f2-5d7b-455d-976f-db23a788a373/bin/uautomizer/witness.graphml [2020-11-28 03:12:10,285 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:12:10,286 INFO L168 Benchmark]: Toolchain (without parser) took 18282.63 ms. Allocated memory was 90.2 MB in the beginning and 249.6 MB in the end (delta: 159.4 MB). Free memory was 54.0 MB in the beginning and 215.6 MB in the end (delta: -161.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:12:10,286 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 90.2 MB. Free memory is still 71.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:12:10,287 INFO L168 Benchmark]: CACSL2BoogieTranslator took 539.14 ms. Allocated memory is still 90.2 MB. Free memory was 53.8 MB in the beginning and 56.3 MB in the end (delta: -2.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:12:10,287 INFO L168 Benchmark]: Boogie Preprocessor took 75.65 ms. Allocated memory is still 90.2 MB. Free memory was 56.3 MB in the beginning and 54.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:12:10,288 INFO L168 Benchmark]: RCFGBuilder took 785.88 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 54.2 MB in the beginning and 73.7 MB in the end (delta: -19.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:12:10,288 INFO L168 Benchmark]: TraceAbstraction took 16807.73 ms. Allocated memory was 113.2 MB in the beginning and 249.6 MB in the end (delta: 136.3 MB). Free memory was 73.7 MB in the beginning and 219.5 MB in the end (delta: -145.8 MB). Peak memory consumption was 133.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:12:10,289 INFO L168 Benchmark]: Witness Printer took 67.66 ms. Allocated memory is still 249.6 MB. Free memory was 219.5 MB in the beginning and 215.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:12:10,291 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 90.2 MB. Free memory is still 71.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 539.14 ms. Allocated memory is still 90.2 MB. Free memory was 53.8 MB in the beginning and 56.3 MB in the end (delta: -2.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.65 ms. Allocated memory is still 90.2 MB. Free memory was 56.3 MB in the beginning and 54.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 785.88 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 54.2 MB in the beginning and 73.7 MB in the end (delta: -19.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16807.73 ms. Allocated memory was 113.2 MB in the beginning and 249.6 MB in the end (delta: 136.3 MB). Free memory was 73.7 MB in the beginning and 219.5 MB in the end (delta: -145.8 MB). Peak memory consumption was 133.5 MB. Max. memory is 16.1 GB. * Witness Printer took 67.66 ms. Allocated memory is still 249.6 MB. Free memory was 219.5 MB in the beginning and 215.6 MB in the end (delta: 3.9 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: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.7s, OverallIterations: 21, TraceHistogramMax: 5, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 519 SDtfs, 1064 SDslu, 950 SDs, 0 SdLazy, 3810 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 561 GetRequests, 269 SyntacticMatches, 5 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=14, 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, 21 MinimizatonAttempts, 122 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 758 NumberOfCodeBlocks, 751 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 729 ConstructedInterpolants, 11 QuantifiedInterpolants, 168010 SizeOfPredicates, 58 NumberOfNonLiveVariables, 996 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 29 InterpolantComputations, 13 PerfectInterpolantSequences, 124/364 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...