./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:26:05,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:26:05,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:26:05,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:26:05,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:26:05,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:26:05,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:26:05,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:26:05,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:26:05,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:26:05,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:26:05,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:26:05,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:26:05,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:26:05,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:26:05,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:26:05,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:26:05,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:26:05,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:26:05,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:26:05,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:26:05,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:26:05,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:26:05,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:26:05,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:26:05,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:26:05,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:26:05,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:26:05,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:26:05,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:26:05,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:26:05,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:26:05,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:26:05,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:26:05,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:26:05,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:26:05,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:26:05,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:26:05,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:26:05,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:26:05,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:26:05,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-11 00:26:05,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:26:05,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:26:05,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:26:05,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:26:05,465 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:26:05,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:26:05,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:26:05,465 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 00:26:05,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:26:05,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:26:05,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:26:05,473 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 00:26:05,474 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 00:26:05,474 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 00:26:05,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:26:05,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 00:26:05,475 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:26:05,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:26:05,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:26:05,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:26:05,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:26:05,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:26:05,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:26:05,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:26:05,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:26:05,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:26:05,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:26:05,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2021-10-11 00:26:05,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:26:05,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:26:05,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:26:05,808 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:26:05,808 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:26:05,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-10-11 00:26:05,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/data/26367b06e/ae3eb40e6ddf4516987c650e692300d2/FLAG28e0b003b [2021-10-11 00:26:06,470 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:26:06,470 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-10-11 00:26:06,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/data/26367b06e/ae3eb40e6ddf4516987c650e692300d2/FLAG28e0b003b [2021-10-11 00:26:06,747 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/data/26367b06e/ae3eb40e6ddf4516987c650e692300d2 [2021-10-11 00:26:06,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:26:06,753 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-11 00:26:06,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:26:06,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:26:06,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:26:06,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:26:06" (1/1) ... [2021-10-11 00:26:06,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b763fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:06, skipping insertion in model container [2021-10-11 00:26:06,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:26:06" (1/1) ... [2021-10-11 00:26:06,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:26:06,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:26:07,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:26:07,166 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:26:07,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:26:07,288 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:26:07,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07 WrapperNode [2021-10-11 00:26:07,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:26:07,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:26:07,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:26:07,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:26:07,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (1/1) ... [2021-10-11 00:26:07,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (1/1) ... [2021-10-11 00:26:07,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (1/1) ... [2021-10-11 00:26:07,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (1/1) ... [2021-10-11 00:26:07,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (1/1) ... [2021-10-11 00:26:07,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (1/1) ... [2021-10-11 00:26:07,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (1/1) ... [2021-10-11 00:26:07,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:26:07,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:26:07,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:26:07,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:26:07,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:26:07,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-11 00:26:07,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:26:07,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-11 00:26:07,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-11 00:26:07,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-11 00:26:07,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-11 00:26:07,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-11 00:26:07,449 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrnlen [2021-10-11 00:26:07,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-11 00:26:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-11 00:26:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-11 00:26:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-11 00:26:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-11 00:26:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-11 00:26:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-11 00:26:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-11 00:26:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-11 00:26:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-11 00:26:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-11 00:26:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-11 00:26:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-11 00:26:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-11 00:26:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-11 00:26:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-11 00:26:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-11 00:26:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-11 00:26:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-11 00:26:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-11 00:26:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-11 00:26:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-11 00:26:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-11 00:26:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-11 00:26:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-11 00:26:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-11 00:26:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-11 00:26:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-11 00:26:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-11 00:26:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-11 00:26:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-11 00:26:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-11 00:26:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-11 00:26:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-11 00:26:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-11 00:26:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-11 00:26:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-11 00:26:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-11 00:26:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-11 00:26:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-11 00:26:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-11 00:26:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-11 00:26:07,458 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-11 00:26:07,458 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-11 00:26:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-11 00:26:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-11 00:26:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-11 00:26:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-11 00:26:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-11 00:26:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-11 00:26:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-11 00:26:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-11 00:26:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-11 00:26:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-11 00:26:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-11 00:26:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-11 00:26:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-11 00:26:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-11 00:26:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-11 00:26:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-11 00:26:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-11 00:26:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-11 00:26:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-11 00:26:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-11 00:26:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-11 00:26:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-11 00:26:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-11 00:26:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-11 00:26:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-11 00:26:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-11 00:26:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-11 00:26:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-11 00:26:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-11 00:26:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-11 00:26:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-11 00:26:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-11 00:26:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-11 00:26:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-11 00:26:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-11 00:26:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-11 00:26:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-11 00:26:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-11 00:26:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-11 00:26:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-11 00:26:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-11 00:26:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-11 00:26:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure cstrnlen [2021-10-11 00:26:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:26:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-11 00:26:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:26:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 00:26:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:26:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-11 00:26:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:26:08,078 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:26:08,083 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-11 00:26:08,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:08 BoogieIcfgContainer [2021-10-11 00:26:08,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:26:08,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:26:08,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:26:08,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:26:08,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:26:06" (1/3) ... [2021-10-11 00:26:08,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782fd493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:26:08, skipping insertion in model container [2021-10-11 00:26:08,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:07" (2/3) ... [2021-10-11 00:26:08,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782fd493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:26:08, skipping insertion in model container [2021-10-11 00:26:08,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:08" (3/3) ... [2021-10-11 00:26:08,109 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2021-10-11 00:26:08,123 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:26:08,126 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2021-10-11 00:26:08,137 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-11 00:26:08,162 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:26:08,162 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 00:26:08,162 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:26:08,162 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:26:08,163 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:26:08,163 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:26:08,163 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:26:08,163 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:26:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-10-11 00:26:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:26:08,231 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:08,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:08,233 INFO L429 AbstractCegarLoop]: === Iteration 1 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:08,239 INFO L82 PathProgramCache]: Analyzing trace with hash 787746653, now seen corresponding path program 1 times [2021-10-11 00:26:08,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:08,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081027046] [2021-10-11 00:26:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:08,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081027046] [2021-10-11 00:26:08,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:08,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:26:08,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023120046] [2021-10-11 00:26:08,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:26:08,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:08,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:26:08,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:26:08,539 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-10-11 00:26:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:08,610 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-10-11 00:26:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:26:08,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-10-11 00:26:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:08,625 INFO L225 Difference]: With dead ends: 37 [2021-10-11 00:26:08,626 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 00:26:08,629 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 [2021-10-11 00:26:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 00:26:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-11 00:26:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 00:26:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-10-11 00:26:08,662 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2021-10-11 00:26:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:08,662 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-10-11 00:26:08,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:26:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-10-11 00:26:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:26:08,663 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:08,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:08,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:26:08,664 INFO L429 AbstractCegarLoop]: === Iteration 2 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash 787746343, now seen corresponding path program 1 times [2021-10-11 00:26:08,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:08,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589666812] [2021-10-11 00:26:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:08,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:08,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589666812] [2021-10-11 00:26:08,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:08,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:26:08,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057365782] [2021-10-11 00:26:08,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:26:08,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:08,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:26:08,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:26:08,769 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2021-10-11 00:26:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:08,907 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-10-11 00:26:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:26:08,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 00:26:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:08,908 INFO L225 Difference]: With dead ends: 32 [2021-10-11 00:26:08,909 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 00:26:08,910 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 [2021-10-11 00:26:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 00:26:08,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-11 00:26:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 00:26:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-10-11 00:26:08,918 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2021-10-11 00:26:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:08,919 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-10-11 00:26:08,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:26:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-10-11 00:26:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:26:08,920 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:08,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:08,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:26:08,921 INFO L429 AbstractCegarLoop]: === Iteration 3 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash 787746344, now seen corresponding path program 1 times [2021-10-11 00:26:08,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:08,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146478014] [2021-10-11 00:26:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:09,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146478014] [2021-10-11 00:26:09,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:09,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:26:09,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679153033] [2021-10-11 00:26:09,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:26:09,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:09,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:26:09,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:26:09,048 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2021-10-11 00:26:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:09,164 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-10-11 00:26:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:26:09,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-10-11 00:26:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:09,167 INFO L225 Difference]: With dead ends: 31 [2021-10-11 00:26:09,168 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 00:26:09,169 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 [2021-10-11 00:26:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 00:26:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-11 00:26:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:26:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-11 00:26:09,185 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 11 [2021-10-11 00:26:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:09,185 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-11 00:26:09,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:26:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-11 00:26:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:26:09,186 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:09,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:09,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 00:26:09,187 INFO L429 AbstractCegarLoop]: === Iteration 4 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:09,187 INFO L82 PathProgramCache]: Analyzing trace with hash 787746397, now seen corresponding path program 1 times [2021-10-11 00:26:09,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:09,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015601992] [2021-10-11 00:26:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:09,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015601992] [2021-10-11 00:26:09,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:09,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:26:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292153522] [2021-10-11 00:26:09,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:26:09,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:09,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:26:09,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:26:09,273 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2021-10-11 00:26:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:09,362 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-10-11 00:26:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:26:09,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-10-11 00:26:09,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:09,367 INFO L225 Difference]: With dead ends: 39 [2021-10-11 00:26:09,367 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 00:26:09,368 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 [2021-10-11 00:26:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 00:26:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-10-11 00:26:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 00:26:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-11 00:26:09,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2021-10-11 00:26:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:09,393 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-11 00:26:09,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:26:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-11 00:26:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:26:09,393 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:09,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:09,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 00:26:09,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash 789593439, now seen corresponding path program 1 times [2021-10-11 00:26:09,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:09,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48809449] [2021-10-11 00:26:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:09,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48809449] [2021-10-11 00:26:09,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:09,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:26:09,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603933273] [2021-10-11 00:26:09,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:26:09,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:09,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:26:09,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:26:09,490 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2021-10-11 00:26:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:09,619 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-10-11 00:26:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:26:09,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-10-11 00:26:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:09,626 INFO L225 Difference]: With dead ends: 43 [2021-10-11 00:26:09,626 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 00:26:09,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:26:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 00:26:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-10-11 00:26:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 00:26:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-10-11 00:26:09,633 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-10-11 00:26:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:09,634 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-10-11 00:26:09,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:26:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-10-11 00:26:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:26:09,635 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:09,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:09,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 00:26:09,636 INFO L429 AbstractCegarLoop]: === Iteration 6 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:09,636 INFO L82 PathProgramCache]: Analyzing trace with hash 849748688, now seen corresponding path program 1 times [2021-10-11 00:26:09,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:09,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549661621] [2021-10-11 00:26:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:09,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549661621] [2021-10-11 00:26:09,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:09,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:26:09,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049580011] [2021-10-11 00:26:09,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:26:09,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:09,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:26:09,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:26:09,746 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2021-10-11 00:26:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:09,886 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-11 00:26:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:26:09,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-10-11 00:26:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:09,887 INFO L225 Difference]: With dead ends: 35 [2021-10-11 00:26:09,887 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 00:26:09,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:26:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 00:26:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-11 00:26:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 00:26:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-10-11 00:26:09,896 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2021-10-11 00:26:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:09,897 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-10-11 00:26:09,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:26:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-10-11 00:26:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:26:09,901 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:09,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:09,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 00:26:09,901 INFO L429 AbstractCegarLoop]: === Iteration 7 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:09,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:09,902 INFO L82 PathProgramCache]: Analyzing trace with hash 849748689, now seen corresponding path program 1 times [2021-10-11 00:26:09,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:09,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104530729] [2021-10-11 00:26:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:10,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:10,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104530729] [2021-10-11 00:26:10,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:10,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 00:26:10,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500863264] [2021-10-11 00:26:10,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:26:10,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:10,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:26:10,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:26:10,058 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2021-10-11 00:26:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:10,263 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-10-11 00:26:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:26:10,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-10-11 00:26:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:10,269 INFO L225 Difference]: With dead ends: 44 [2021-10-11 00:26:10,269 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 00:26:10,270 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 [2021-10-11 00:26:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 00:26:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2021-10-11 00:26:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 00:26:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-10-11 00:26:10,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2021-10-11 00:26:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:10,286 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-10-11 00:26:10,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:26:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-10-11 00:26:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 00:26:10,287 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:10,287 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:10,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 00:26:10,288 INFO L429 AbstractCegarLoop]: === Iteration 8 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2015068958, now seen corresponding path program 1 times [2021-10-11 00:26:10,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:10,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880134891] [2021-10-11 00:26:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:10,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:10,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880134891] [2021-10-11 00:26:10,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870385204] [2021-10-11 00:26:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:26:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:10,644 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 00:26:10,645 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:10,652 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:10,653 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:26:10,653 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 00:26:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:10,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:10,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-11 00:26:10,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923646896] [2021-10-11 00:26:10,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:26:10,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:10,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:26:10,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:26:10,714 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2021-10-11 00:26:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:10,898 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-10-11 00:26:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:26:10,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-10-11 00:26:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:10,899 INFO L225 Difference]: With dead ends: 44 [2021-10-11 00:26:10,900 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 00:26:10,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:26:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 00:26:10,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-10-11 00:26:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 00:26:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-10-11 00:26:10,903 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2021-10-11 00:26:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:10,904 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-10-11 00:26:10,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:26:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-10-11 00:26:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 00:26:10,905 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:10,905 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:11,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-11 00:26:11,124 INFO L429 AbstractCegarLoop]: === Iteration 9 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1695397446, now seen corresponding path program 1 times [2021-10-11 00:26:11,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:11,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074764725] [2021-10-11 00:26:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:11,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074764725] [2021-10-11 00:26:11,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:11,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:26:11,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102047757] [2021-10-11 00:26:11,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:26:11,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:26:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:26:11,161 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2021-10-11 00:26:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:11,241 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-10-11 00:26:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:26:11,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-10-11 00:26:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:11,243 INFO L225 Difference]: With dead ends: 36 [2021-10-11 00:26:11,243 INFO L226 Difference]: Without dead ends: 36 [2021-10-11 00:26:11,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:26:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-11 00:26:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-11 00:26:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 00:26:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-10-11 00:26:11,246 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-10-11 00:26:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:11,247 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-10-11 00:26:11,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:26:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-10-11 00:26:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 00:26:11,248 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:11,248 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] [2021-10-11 00:26:11,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 00:26:11,248 INFO L429 AbstractCegarLoop]: === Iteration 10 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:11,249 INFO L82 PathProgramCache]: Analyzing trace with hash 964873536, now seen corresponding path program 1 times [2021-10-11 00:26:11,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:11,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298462778] [2021-10-11 00:26:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-11 00:26:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:11,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298462778] [2021-10-11 00:26:11,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:11,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 00:26:11,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124725420] [2021-10-11 00:26:11,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:26:11,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:11,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:26:11,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:26:11,348 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2021-10-11 00:26:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:11,545 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-10-11 00:26:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:26:11,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-10-11 00:26:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:11,546 INFO L225 Difference]: With dead ends: 58 [2021-10-11 00:26:11,547 INFO L226 Difference]: Without dead ends: 58 [2021-10-11 00:26:11,547 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 [2021-10-11 00:26:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-11 00:26:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-10-11 00:26:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-11 00:26:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-10-11 00:26:11,553 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 21 [2021-10-11 00:26:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:11,553 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-10-11 00:26:11,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:26:11,553 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-10-11 00:26:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 00:26:11,555 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:11,555 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] [2021-10-11 00:26:11,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 00:26:11,556 INFO L429 AbstractCegarLoop]: === Iteration 11 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash -46243714, now seen corresponding path program 1 times [2021-10-11 00:26:11,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:11,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847054742] [2021-10-11 00:26:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-11 00:26:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:11,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847054742] [2021-10-11 00:26:11,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:11,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-11 00:26:11,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915526735] [2021-10-11 00:26:11,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:26:11,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:11,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:26:11,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:26:11,657 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2021-10-11 00:26:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:11,843 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-10-11 00:26:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 00:26:11,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-10-11 00:26:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:11,845 INFO L225 Difference]: With dead ends: 55 [2021-10-11 00:26:11,845 INFO L226 Difference]: Without dead ends: 51 [2021-10-11 00:26:11,845 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 [2021-10-11 00:26:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-11 00:26:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-10-11 00:26:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 00:26:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-11 00:26:11,849 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-10-11 00:26:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:11,849 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-11 00:26:11,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:26:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-11 00:26:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 00:26:11,850 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:11,850 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] [2021-10-11 00:26:11,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 00:26:11,851 INFO L429 AbstractCegarLoop]: === Iteration 12 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1827219927, now seen corresponding path program 1 times [2021-10-11 00:26:11,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:11,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009914244] [2021-10-11 00:26:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:11,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009914244] [2021-10-11 00:26:11,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213362784] [2021-10-11 00:26:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 00:26:12,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:12,169 INFO L382 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 [2021-10-11 00:26:12,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:12,178 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:12,182 INFO L547 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. [2021-10-11 00:26:12,182 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2021-10-11 00:26:12,437 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:12,442 INFO L382 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 [2021-10-11 00:26:12,444 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-10-11 00:26:12,458 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:12,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:26:12,470 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-10-11 00:26:12,472 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:26:12,473 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:31 [2021-10-11 00:26:12,511 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:26:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:12,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:12,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-10-11 00:26:12,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536277755] [2021-10-11 00:26:12,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-10-11 00:26:12,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:12,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-11 00:26:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-10-11 00:26:12,619 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 16 states. [2021-10-11 00:26:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:14,137 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-10-11 00:26:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-11 00:26:14,137 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2021-10-11 00:26:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:14,139 INFO L225 Difference]: With dead ends: 80 [2021-10-11 00:26:14,139 INFO L226 Difference]: Without dead ends: 80 [2021-10-11 00:26:14,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-10-11 00:26:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-11 00:26:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2021-10-11 00:26:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-10-11 00:26:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-10-11 00:26:14,150 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 22 [2021-10-11 00:26:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:14,151 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-10-11 00:26:14,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-10-11 00:26:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-10-11 00:26:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-11 00:26:14,158 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:14,158 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] [2021-10-11 00:26:14,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-11 00:26:14,372 INFO L429 AbstractCegarLoop]: === Iteration 13 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash -862082627, now seen corresponding path program 1 times [2021-10-11 00:26:14,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:14,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814876412] [2021-10-11 00:26:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:14,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:14,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-11 00:26:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:14,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814876412] [2021-10-11 00:26:14,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:14,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:26:14,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507499709] [2021-10-11 00:26:14,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:26:14,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:14,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:26:14,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:26:14,432 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 5 states. [2021-10-11 00:26:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:14,490 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-10-11 00:26:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:26:14,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-10-11 00:26:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:14,491 INFO L225 Difference]: With dead ends: 63 [2021-10-11 00:26:14,491 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 00:26:14,492 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 [2021-10-11 00:26:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 00:26:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-11 00:26:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 00:26:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-10-11 00:26:14,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 23 [2021-10-11 00:26:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:14,498 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-10-11 00:26:14,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:26:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-10-11 00:26:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 00:26:14,504 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:14,504 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] [2021-10-11 00:26:14,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-11 00:26:14,505 INFO L429 AbstractCegarLoop]: === Iteration 14 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash 592155267, now seen corresponding path program 1 times [2021-10-11 00:26:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:14,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330473726] [2021-10-11 00:26:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:14,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330473726] [2021-10-11 00:26:14,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236455467] [2021-10-11 00:26:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:14,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:26:14,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:14,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 00:26:14,779 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:14,785 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:14,786 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:26:14,786 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:10, output treesize:5 [2021-10-11 00:26:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:14,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:26:14,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-10-11 00:26:14,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792862892] [2021-10-11 00:26:14,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:26:14,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:26:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-11 00:26:14,898 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 8 states. [2021-10-11 00:26:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:14,986 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-10-11 00:26:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:26:14,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-10-11 00:26:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:14,987 INFO L225 Difference]: With dead ends: 47 [2021-10-11 00:26:14,988 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 00:26:14,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-10-11 00:26:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 00:26:14,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-11 00:26:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 00:26:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-11 00:26:14,993 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2021-10-11 00:26:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:14,994 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-11 00:26:14,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:26:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-11 00:26:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 00:26:14,995 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:14,996 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] [2021-10-11 00:26:15,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 00:26:15,224 INFO L429 AbstractCegarLoop]: === Iteration 15 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash 811009985, now seen corresponding path program 1 times [2021-10-11 00:26:15,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:15,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531490766] [2021-10-11 00:26:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:15,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:15,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531490766] [2021-10-11 00:26:15,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227730083] [2021-10-11 00:26:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:15,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-11 00:26:15,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:15,514 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 00:26:15,514 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:15,519 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:15,520 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:26:15,520 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2021-10-11 00:26:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:15,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:26:15,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-10-11 00:26:15,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748174095] [2021-10-11 00:26:15,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:26:15,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:26:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:26:15,650 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2021-10-11 00:26:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:15,758 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-10-11 00:26:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:26:15,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-10-11 00:26:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:15,761 INFO L225 Difference]: With dead ends: 48 [2021-10-11 00:26:15,761 INFO L226 Difference]: Without dead ends: 36 [2021-10-11 00:26:15,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-10-11 00:26:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-11 00:26:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-10-11 00:26:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 00:26:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-11 00:26:15,765 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-10-11 00:26:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:15,765 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-11 00:26:15,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:26:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-11 00:26:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-11 00:26:15,766 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:15,766 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] [2021-10-11 00:26:15,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:15,992 INFO L429 AbstractCegarLoop]: === Iteration 16 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2038559330, now seen corresponding path program 1 times [2021-10-11 00:26:15,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:15,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47199063] [2021-10-11 00:26:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:16,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:16,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47199063] [2021-10-11 00:26:16,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580949978] [2021-10-11 00:26:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:16,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-11 00:26:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:16,505 INFO L382 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 [2021-10-11 00:26:16,506 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:16,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:16,512 INFO L547 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. [2021-10-11 00:26:16,513 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2021-10-11 00:26:16,880 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:16,880 INFO L382 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 [2021-10-11 00:26:16,885 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-10-11 00:26:16,898 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:16,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:26:16,902 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-10-11 00:26:16,908 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:26:16,908 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2021-10-11 00:26:16,951 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:26:16,952 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:26:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:17,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:17,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-11 00:26:17,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321210280] [2021-10-11 00:26:17,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-10-11 00:26:17,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:17,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-11 00:26:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-10-11 00:26:17,097 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 24 states. [2021-10-11 00:26:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:20,474 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-10-11 00:26:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-11 00:26:20,475 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2021-10-11 00:26:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:20,475 INFO L225 Difference]: With dead ends: 63 [2021-10-11 00:26:20,475 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 00:26:20,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=214, Invalid=1507, Unknown=1, NotChecked=0, Total=1722 [2021-10-11 00:26:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 00:26:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-10-11 00:26:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-11 00:26:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-10-11 00:26:20,479 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 32 [2021-10-11 00:26:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:20,479 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-10-11 00:26:20,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-10-11 00:26:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-10-11 00:26:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-11 00:26:20,480 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:20,481 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] [2021-10-11 00:26:20,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-11 00:26:20,692 INFO L429 AbstractCegarLoop]: === Iteration 17 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:20,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:20,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1250412755, now seen corresponding path program 2 times [2021-10-11 00:26:20,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:20,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573672259] [2021-10-11 00:26:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:20,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:20,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573672259] [2021-10-11 00:26:20,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422813534] [2021-10-11 00:26:20,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:21,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:26:21,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:26:21,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-11 00:26:21,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:21,328 INFO L382 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 [2021-10-11 00:26:21,329 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:21,337 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:21,339 INFO L547 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. [2021-10-11 00:26:21,339 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-10-11 00:26:21,541 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-11 00:26:21,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:21,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:21,546 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:26:21,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-10-11 00:26:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:21,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:21,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-10-11 00:26:21,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267153334] [2021-10-11 00:26:21,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-10-11 00:26:21,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-11 00:26:21,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-10-11 00:26:21,562 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 23 states. [2021-10-11 00:26:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:22,303 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-10-11 00:26:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-11 00:26:22,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2021-10-11 00:26:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:22,304 INFO L225 Difference]: With dead ends: 70 [2021-10-11 00:26:22,305 INFO L226 Difference]: Without dead ends: 50 [2021-10-11 00:26:22,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-10-11 00:26:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-11 00:26:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-10-11 00:26:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-10-11 00:26:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-10-11 00:26:22,308 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2021-10-11 00:26:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:22,309 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-10-11 00:26:22,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-10-11 00:26:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-10-11 00:26:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-11 00:26:22,310 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:22,310 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] [2021-10-11 00:26:22,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-11 00:26:22,524 INFO L429 AbstractCegarLoop]: === Iteration 18 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:26:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:22,524 INFO L82 PathProgramCache]: Analyzing trace with hash 736937968, now seen corresponding path program 3 times [2021-10-11 00:26:22,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:22,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87241030] [2021-10-11 00:26:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:22,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:26:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:22,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87241030] [2021-10-11 00:26:22,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697486023] [2021-10-11 00:26:22,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:22,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-11 00:26:22,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:26:22,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 00:26:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:22,912 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 00:26:22,913 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:22,916 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:22,917 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:26:22,917 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2021-10-11 00:26:22,967 INFO L382 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 16 treesize of output 12 [2021-10-11 00:26:22,968 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:26:22,976 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:22,977 INFO L547 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. [2021-10-11 00:26:22,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2021-10-11 00:26:23,173 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:23,173 INFO L382 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 20 treesize of output 20 [2021-10-11 00:26:23,175 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-10-11 00:26:23,189 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:26:23,190 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:26:23,192 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:26:23,193 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-10-11 00:26:23,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:26:23,233 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:26:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-11 00:26:23,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:23,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-11 00:26:23,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109895037] [2021-10-11 00:26:23,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-10-11 00:26:23,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-11 00:26:23,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-10-11 00:26:23,358 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2021-10-11 00:26:24,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:24,237 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-11 00:26:24,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 00:26:24,238 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2021-10-11 00:26:24,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:24,238 INFO L225 Difference]: With dead ends: 49 [2021-10-11 00:26:24,238 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 00:26:24,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-10-11 00:26:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 00:26:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 00:26:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 00:26:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:26:24,239 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2021-10-11 00:26:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:24,239 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:26:24,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-10-11 00:26:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:26:24,240 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 00:26:24,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-11 00:26:24,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:26:24 BoogieIcfgContainer [2021-10-11 00:26:24,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:26:24,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:26:24,444 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:26:24,445 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:26:24,445 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:08" (3/4) ... [2021-10-11 00:26:24,448 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 00:26:24,455 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-11 00:26:24,455 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-11 00:26:24,455 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrnlen [2021-10-11 00:26:24,455 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-11 00:26:24,456 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-11 00:26:24,456 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-11 00:26:24,456 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-11 00:26:24,456 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-11 00:26:24,461 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-11 00:26:24,461 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-11 00:26:24,461 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:26:24,461 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:26:24,517 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62409364-dbfc-450f-92eb-fe9e3dfc3cb3/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:26:24,517 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:26:24,518 INFO L168 Benchmark]: Toolchain (without parser) took 17764.96 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 64.7 MB in the beginning and 107.4 MB in the end (delta: -42.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:24,518 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 82.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:26:24,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 532.74 ms. Allocated memory is still 107.0 MB. Free memory was 64.6 MB in the beginning and 70.6 MB in the end (delta: -6.0 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:24,519 INFO L168 Benchmark]: Boogie Preprocessor took 53.18 ms. Allocated memory is still 107.0 MB. Free memory was 70.6 MB in the beginning and 68.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:24,523 INFO L168 Benchmark]: RCFGBuilder took 741.42 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 68.1 MB in the beginning and 97.0 MB in the end (delta: -28.9 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:24,524 INFO L168 Benchmark]: TraceAbstraction took 16356.92 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 97.0 MB in the beginning and 110.1 MB in the end (delta: -13.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:24,525 INFO L168 Benchmark]: Witness Printer took 72.88 ms. Allocated memory is still 157.3 MB. Free memory was 110.1 MB in the beginning and 107.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:24,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 82.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 532.74 ms. Allocated memory is still 107.0 MB. Free memory was 64.6 MB in the beginning and 70.6 MB in the end (delta: -6.0 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.18 ms. Allocated memory is still 107.0 MB. Free memory was 70.6 MB in the beginning and 68.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 741.42 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 68.1 MB in the beginning and 97.0 MB in the end (delta: -28.9 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16356.92 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 97.0 MB in the beginning and 110.1 MB in the end (delta: -13.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Witness Printer took 72.88 ms. Allocated memory is still 157.3 MB. Free memory was 110.1 MB in the beginning and 107.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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: 16.2s, OverallIterations: 18, TraceHistogramMax: 4, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 449 SDtfs, 920 SDslu, 761 SDs, 0 SdLazy, 2777 SolverSat, 187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 444 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=12, 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, 18 MinimizatonAttempts, 79 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 573 ConstructedInterpolants, 41 QuantifiedInterpolants, 119129 SizeOfPredicates, 54 NumberOfNonLiveVariables, 823 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 25 InterpolantComputations, 13 PerfectInterpolantSequences, 103/236 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...