./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:06:36,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:06:36,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:06:36,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:06:36,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:06:36,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:06:36,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:06:36,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:06:36,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:06:36,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:06:36,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:06:36,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:06:36,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:06:36,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:06:36,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:06:36,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:06:36,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:06:36,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:06:36,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:06:36,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:06:36,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:06:36,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:06:36,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:06:36,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:06:36,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:06:36,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:06:36,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:06:36,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:06:36,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:06:36,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:06:36,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:06:36,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:06:36,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:06:36,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:06:36,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:06:36,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:06:36,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:06:36,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:06:36,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:06:36,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:06:36,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:06:36,463 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:06:36,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:06:36,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:06:36,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:06:36,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:06:36,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:06:36,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:06:36,493 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:06:36,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:06:36,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:06:36,494 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:06:36,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:06:36,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:06:36,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:06:36,495 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:06:36,495 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:06:36,495 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:06:36,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:06:36,495 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:06:36,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:06:36,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:06:36,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:06:36,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:06:36,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:06:36,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:06:36,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:06:36,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:06:36,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:06:36,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:06:36,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:06:36,499 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_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 [2021-10-21 20:06:36,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:06:36,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:06:36,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:06:36,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:06:36,800 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:06:36,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-10-21 20:06:36,906 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/data/599348912/0ab3a060d85b4d83bfb5d2391530bab4/FLAG8e9e69c3b [2021-10-21 20:06:37,509 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:06:37,510 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-10-21 20:06:37,534 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/data/599348912/0ab3a060d85b4d83bfb5d2391530bab4/FLAG8e9e69c3b [2021-10-21 20:06:37,797 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/data/599348912/0ab3a060d85b4d83bfb5d2391530bab4 [2021-10-21 20:06:37,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:06:37,801 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:06:37,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:06:37,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:06:37,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:06:37,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:06:37" (1/1) ... [2021-10-21 20:06:37,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dacf017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:37, skipping insertion in model container [2021-10-21 20:06:37,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:06:37" (1/1) ... [2021-10-21 20:06:37,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:06:37,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:06:38,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:06:38,179 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:06:38,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:06:38,294 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:06:38,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38 WrapperNode [2021-10-21 20:06:38,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:06:38,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:06:38,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:06:38,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:06:38,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (1/1) ... [2021-10-21 20:06:38,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (1/1) ... [2021-10-21 20:06:38,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (1/1) ... [2021-10-21 20:06:38,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (1/1) ... [2021-10-21 20:06:38,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (1/1) ... [2021-10-21 20:06:38,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (1/1) ... [2021-10-21 20:06:38,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (1/1) ... [2021-10-21 20:06:38,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:06:38,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:06:38,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:06:38,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:06:38,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (1/1) ... [2021-10-21 20:06:38,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:06:38,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:38,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:06:38,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:06:38,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:06:38,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:06:38,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 20:06:38,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 20:06:38,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 20:06:38,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 20:06:38,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 20:06:38,447 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncmp [2021-10-21 20:06:38,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:06:38,447 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 20:06:38,447 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 20:06:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 20:06:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 20:06:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 20:06:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 20:06:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 20:06:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 20:06:38,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 20:06:38,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 20:06:38,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 20:06:38,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 20:06:38,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 20:06:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 20:06:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 20:06:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 20:06:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 20:06:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 20:06:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 20:06:38,451 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 20:06:38,451 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 20:06:38,451 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 20:06:38,451 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 20:06:38,451 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 20:06:38,452 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 20:06:38,452 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 20:06:38,452 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 20:06:38,452 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 20:06:38,452 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 20:06:38,452 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 20:06:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 20:06:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 20:06:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 20:06:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 20:06:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 20:06:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 20:06:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 20:06:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 20:06:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 20:06:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 20:06:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 20:06:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 20:06:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 20:06:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 20:06:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 20:06:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 20:06:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 20:06:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 20:06:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 20:06:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 20:06:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 20:06:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 20:06:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 20:06:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 20:06:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 20:06:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 20:06:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 20:06:38,458 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 20:06:38,458 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 20:06:38,458 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 20:06:38,458 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 20:06:38,458 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 20:06:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 20:06:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:06:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 20:06:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 20:06:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 20:06:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 20:06:38,460 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 20:06:38,460 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 20:06:38,460 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 20:06:38,460 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 20:06:38,460 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 20:06:38,461 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 20:06:38,461 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 20:06:38,461 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 20:06:38,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 20:06:38,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 20:06:38,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 20:06:38,462 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 20:06:38,462 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 20:06:38,462 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 20:06:38,462 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 20:06:38,462 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 20:06:38,462 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 20:06:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 20:06:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 20:06:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 20:06:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 20:06:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 20:06:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 20:06:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 20:06:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 20:06:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 20:06:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 20:06:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 20:06:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 20:06:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 20:06:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 20:06:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 20:06:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 20:06:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 20:06:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 20:06:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 20:06:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 20:06:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 20:06:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 20:06:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:06:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-21 20:06:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncmp [2021-10-21 20:06:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:06:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:06:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:06:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:06:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:06:38,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:06:38,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:06:39,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:06:39,001 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 20:06:39,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:06:39 BoogieIcfgContainer [2021-10-21 20:06:39,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:06:39,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:06:39,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:06:39,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:06:39,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:06:37" (1/3) ... [2021-10-21 20:06:39,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222707e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:06:39, skipping insertion in model container [2021-10-21 20:06:39,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:38" (2/3) ... [2021-10-21 20:06:39,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222707e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:06:39, skipping insertion in model container [2021-10-21 20:06:39,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:06:39" (3/3) ... [2021-10-21 20:06:39,013 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2021-10-21 20:06:39,019 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:06:39,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-21 20:06:39,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:06:39,070 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:06:39,070 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-21 20:06:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:06:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:06:39,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:39,094 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:39,095 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:39,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2021-10-21 20:06:39,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:39,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917224530] [2021-10-21 20:06:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:39,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:39,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:39,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:39,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917224530] [2021-10-21 20:06:39,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917224530] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:39,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:39,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:06:39,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112844905] [2021-10-21 20:06:39,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:06:39,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:06:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:39,381 INFO L87 Difference]: Start difference. First operand has 63 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:39,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:39,668 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-10-21 20:06:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:39,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:06:39,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:39,680 INFO L225 Difference]: With dead ends: 85 [2021-10-21 20:06:39,680 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 20:06:39,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:06:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 20:06:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2021-10-21 20:06:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 57 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-10-21 20:06:39,726 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 11 [2021-10-21 20:06:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:39,727 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-10-21 20:06:39,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-10-21 20:06:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:06:39,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:39,728 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:39,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:06:39,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1095106359, now seen corresponding path program 1 times [2021-10-21 20:06:39,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:39,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065196166] [2021-10-21 20:06:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:39,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:39,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:39,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:39,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065196166] [2021-10-21 20:06:39,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065196166] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:39,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:39,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:06:39,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823336141] [2021-10-21 20:06:39,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:06:39,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:39,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:06:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:39,844 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:40,014 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-10-21 20:06:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:06:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:06:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:40,020 INFO L225 Difference]: With dead ends: 86 [2021-10-21 20:06:40,020 INFO L226 Difference]: Without dead ends: 86 [2021-10-21 20:06:40,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-21 20:06:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2021-10-21 20:06:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 59 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-10-21 20:06:40,042 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 11 [2021-10-21 20:06:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:40,042 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-10-21 20:06:40,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-10-21 20:06:40,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:06:40,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:40,044 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:40,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:06:40,044 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:40,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1095106360, now seen corresponding path program 1 times [2021-10-21 20:06:40,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:40,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141278980] [2021-10-21 20:06:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:40,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:40,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:40,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141278980] [2021-10-21 20:06:40,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141278980] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:40,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:40,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:06:40,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4168072] [2021-10-21 20:06:40,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:06:40,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:40,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:06:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:40,143 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:40,263 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-10-21 20:06:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:06:40,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:06:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:40,270 INFO L225 Difference]: With dead ends: 63 [2021-10-21 20:06:40,270 INFO L226 Difference]: Without dead ends: 63 [2021-10-21 20:06:40,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-21 20:06:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-21 20:06:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-10-21 20:06:40,299 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 11 [2021-10-21 20:06:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:40,300 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-10-21 20:06:40,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-10-21 20:06:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 20:06:40,301 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:40,301 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:40,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:06:40,302 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:40,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1905282242, now seen corresponding path program 1 times [2021-10-21 20:06:40,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:40,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352028561] [2021-10-21 20:06:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:40,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:40,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:40,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352028561] [2021-10-21 20:06:40,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352028561] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:40,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:40,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:06:40,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185244089] [2021-10-21 20:06:40,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:06:40,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:06:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:40,439 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:40,587 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-10-21 20:06:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:06:40,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 20:06:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:40,590 INFO L225 Difference]: With dead ends: 62 [2021-10-21 20:06:40,590 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 20:06:40,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:40,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 20:06:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-21 20:06:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-10-21 20:06:40,611 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 13 [2021-10-21 20:06:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:40,611 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-10-21 20:06:40,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,612 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-10-21 20:06:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 20:06:40,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:40,613 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:40,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:06:40,614 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1905282190, now seen corresponding path program 1 times [2021-10-21 20:06:40,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:40,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991221854] [2021-10-21 20:06:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:40,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:40,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:40,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991221854] [2021-10-21 20:06:40,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991221854] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:40,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:40,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:06:40,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157495325] [2021-10-21 20:06:40,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:06:40,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:40,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:06:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:40,706 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:40,817 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-10-21 20:06:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:40,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 20:06:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:40,819 INFO L225 Difference]: With dead ends: 83 [2021-10-21 20:06:40,819 INFO L226 Difference]: Without dead ends: 83 [2021-10-21 20:06:40,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-21 20:06:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-10-21 20:06:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 67 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-10-21 20:06:40,834 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 13 [2021-10-21 20:06:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:40,834 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-10-21 20:06:40,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-10-21 20:06:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 20:06:40,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:40,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:40,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:06:40,835 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:40,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1848023888, now seen corresponding path program 1 times [2021-10-21 20:06:40,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:40,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210748350] [2021-10-21 20:06:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:40,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:40,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:40,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210748350] [2021-10-21 20:06:40,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210748350] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:40,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:40,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:06:40,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420865090] [2021-10-21 20:06:40,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:06:40,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:06:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:40,908 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:40,997 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-10-21 20:06:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:06:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 20:06:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:40,999 INFO L225 Difference]: With dead ends: 71 [2021-10-21 20:06:40,999 INFO L226 Difference]: Without dead ends: 71 [2021-10-21 20:06:41,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:41,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-21 20:06:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-21 20:06:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.5) internal successors, (78), 65 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-10-21 20:06:41,012 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 13 [2021-10-21 20:06:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:41,013 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-10-21 20:06:41,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-10-21 20:06:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 20:06:41,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:41,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:41,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:06:41,020 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:41,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1848023887, now seen corresponding path program 1 times [2021-10-21 20:06:41,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:41,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453240231] [2021-10-21 20:06:41,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:41,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:41,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:41,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:41,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453240231] [2021-10-21 20:06:41,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453240231] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:41,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:41,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:06:41,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18245524] [2021-10-21 20:06:41,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:41,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:41,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:41,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:41,109 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:41,264 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-10-21 20:06:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:41,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 20:06:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:41,265 INFO L225 Difference]: With dead ends: 83 [2021-10-21 20:06:41,265 INFO L226 Difference]: Without dead ends: 83 [2021-10-21 20:06:41,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:06:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-21 20:06:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-10-21 20:06:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5) internal successors, (81), 67 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-10-21 20:06:41,270 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 13 [2021-10-21 20:06:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:41,270 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-10-21 20:06:41,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-10-21 20:06:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:06:41,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:41,271 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:41,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:06:41,271 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1065792642, now seen corresponding path program 1 times [2021-10-21 20:06:41,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:41,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929020300] [2021-10-21 20:06:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:41,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:41,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:41,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:41,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929020300] [2021-10-21 20:06:41,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929020300] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:41,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:41,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:06:41,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713055799] [2021-10-21 20:06:41,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:06:41,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:06:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:41,327 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:41,442 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2021-10-21 20:06:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:06:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-21 20:06:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:41,443 INFO L225 Difference]: With dead ends: 72 [2021-10-21 20:06:41,443 INFO L226 Difference]: Without dead ends: 72 [2021-10-21 20:06:41,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-21 20:06:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-21 20:06:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 66 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-10-21 20:06:41,447 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 14 [2021-10-21 20:06:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:41,447 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-10-21 20:06:41,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-10-21 20:06:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:06:41,448 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:41,449 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:41,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:06:41,449 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:41,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2021-10-21 20:06:41,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:41,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082136388] [2021-10-21 20:06:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:41,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:41,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:41,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:41,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082136388] [2021-10-21 20:06:41,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082136388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:41,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412599636] [2021-10-21 20:06:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:41,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:41,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:41,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:41,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:06:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:41,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:06:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:41,800 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 20:06:41,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:06:41,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-21 20:06:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:41,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412599636] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:41,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:06:41,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 20:06:41,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792253089] [2021-10-21 20:06:41,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:06:41,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:06:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:06:41,961 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:42,226 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2021-10-21 20:06:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:42,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 20:06:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:42,227 INFO L225 Difference]: With dead ends: 92 [2021-10-21 20:06:42,227 INFO L226 Difference]: Without dead ends: 92 [2021-10-21 20:06:42,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-21 20:06:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-10-21 20:06:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.44) internal successors, (72), 61 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-10-21 20:06:42,230 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 15 [2021-10-21 20:06:42,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:42,231 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-10-21 20:06:42,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-10-21 20:06:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:06:42,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:42,232 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:42,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:42,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:42,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2008977164, now seen corresponding path program 1 times [2021-10-21 20:06:42,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:42,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514016060] [2021-10-21 20:06:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:42,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:42,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:42,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514016060] [2021-10-21 20:06:42,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514016060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:42,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557822755] [2021-10-21 20:06:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:42,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:42,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:42,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:42,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:06:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:42,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:06:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:42,795 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:06:42,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:06:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:42,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557822755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:42,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:06:42,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-21 20:06:42,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129431874] [2021-10-21 20:06:42,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:06:42,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:42,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:06:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:42,924 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:43,126 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-10-21 20:06:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:06:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 20:06:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:43,127 INFO L225 Difference]: With dead ends: 75 [2021-10-21 20:06:43,127 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 20:06:43,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 20:06:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2021-10-21 20:06:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 58 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-10-21 20:06:43,131 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 17 [2021-10-21 20:06:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:43,132 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-10-21 20:06:43,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-10-21 20:06:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:06:43,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:43,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:43,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:43,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 20:06:43,347 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrncmpErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:43,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1968803502, now seen corresponding path program 1 times [2021-10-21 20:06:43,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:43,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520276494] [2021-10-21 20:06:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:43,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:43,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:43,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:43,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520276494] [2021-10-21 20:06:43,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520276494] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:43,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:43,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:06:43,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653079823] [2021-10-21 20:06:43,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:43,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:43,405 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:43,554 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-10-21 20:06:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:43,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-21 20:06:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:43,556 INFO L225 Difference]: With dead ends: 62 [2021-10-21 20:06:43,556 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 20:06:43,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 20:06:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-21 20:06:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.375) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-10-21 20:06:43,560 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 19 [2021-10-21 20:06:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:43,560 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-10-21 20:06:43,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-10-21 20:06:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:06:43,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:43,561 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:43,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 20:06:43,562 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1968803501, now seen corresponding path program 1 times [2021-10-21 20:06:43,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:43,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712634630] [2021-10-21 20:06:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:43,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:43,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:43,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:43,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712634630] [2021-10-21 20:06:43,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712634630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:43,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:43,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 20:06:43,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217181020] [2021-10-21 20:06:43,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:06:43,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:06:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:43,678 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:43,908 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-10-21 20:06:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:06:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-21 20:06:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:43,911 INFO L225 Difference]: With dead ends: 76 [2021-10-21 20:06:43,911 INFO L226 Difference]: Without dead ends: 76 [2021-10-21 20:06:43,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:06:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-21 20:06:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-10-21 20:06:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 61 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-10-21 20:06:43,915 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 19 [2021-10-21 20:06:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:43,915 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-10-21 20:06:43,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-10-21 20:06:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:06:43,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:43,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:43,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 20:06:43,921 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrncmpErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:43,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2060413811, now seen corresponding path program 1 times [2021-10-21 20:06:43,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:43,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119664874] [2021-10-21 20:06:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:43,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:43,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:44,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:44,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119664874] [2021-10-21 20:06:44,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119664874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:44,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:44,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:06:44,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488662543] [2021-10-21 20:06:44,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:06:44,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:06:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:06:44,004 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:44,163 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-10-21 20:06:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:06:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:06:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:44,165 INFO L225 Difference]: With dead ends: 66 [2021-10-21 20:06:44,165 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 20:06:44,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:06:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 20:06:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-21 20:06:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 60 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-10-21 20:06:44,168 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 21 [2021-10-21 20:06:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:44,168 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-10-21 20:06:44,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-10-21 20:06:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:06:44,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:44,169 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:44,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 20:06:44,169 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2060413812, now seen corresponding path program 1 times [2021-10-21 20:06:44,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:44,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105305479] [2021-10-21 20:06:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:44,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:44,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:44,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105305479] [2021-10-21 20:06:44,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105305479] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:44,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:44,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:06:44,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251018728] [2021-10-21 20:06:44,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:06:44,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:44,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:06:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:44,288 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:44,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:44,556 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-10-21 20:06:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:44,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:06:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:44,557 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:06:44,557 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 20:06:44,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:06:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 20:06:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-21 20:06:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-21 20:06:44,561 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 21 [2021-10-21 20:06:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:44,561 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-21 20:06:44,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-21 20:06:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:06:44,562 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:44,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:44,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 20:06:44,563 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:44,564 INFO L82 PathProgramCache]: Analyzing trace with hash -551434875, now seen corresponding path program 1 times [2021-10-21 20:06:44,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:44,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621093000] [2021-10-21 20:06:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:44,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 20:06:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:44,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:44,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621093000] [2021-10-21 20:06:44,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621093000] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:44,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:44,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:06:44,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785031831] [2021-10-21 20:06:44,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:06:44,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:06:44,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:44,671 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:44,768 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-10-21 20:06:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:06:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-10-21 20:06:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:44,769 INFO L225 Difference]: With dead ends: 65 [2021-10-21 20:06:44,769 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 20:06:44,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 20:06:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-21 20:06:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 54 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-21 20:06:44,776 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 22 [2021-10-21 20:06:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:44,776 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-21 20:06:44,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:06:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-21 20:06:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:06:44,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:44,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:44,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 20:06:44,780 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrncmpErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash 77751092, now seen corresponding path program 1 times [2021-10-21 20:06:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:44,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324035511] [2021-10-21 20:06:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:44,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:44,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:44,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324035511] [2021-10-21 20:06:44,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324035511] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:44,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:44,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:06:44,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896862321] [2021-10-21 20:06:44,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:06:44,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:06:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:06:44,866 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:45,011 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-10-21 20:06:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:06:45,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-21 20:06:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:45,013 INFO L225 Difference]: With dead ends: 58 [2021-10-21 20:06:45,013 INFO L226 Difference]: Without dead ends: 58 [2021-10-21 20:06:45,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:06:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-21 20:06:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-21 20:06:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-21 20:06:45,017 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 23 [2021-10-21 20:06:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:45,017 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-21 20:06:45,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-21 20:06:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:06:45,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:45,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:45,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 20:06:45,019 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrncmpErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash 77751093, now seen corresponding path program 1 times [2021-10-21 20:06:45,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:45,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792369112] [2021-10-21 20:06:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:45,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:45,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:45,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792369112] [2021-10-21 20:06:45,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792369112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:45,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:45,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 20:06:45,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647764586] [2021-10-21 20:06:45,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:06:45,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:06:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:45,122 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:45,293 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-10-21 20:06:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-21 20:06:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:45,294 INFO L225 Difference]: With dead ends: 63 [2021-10-21 20:06:45,294 INFO L226 Difference]: Without dead ends: 63 [2021-10-21 20:06:45,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:06:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-21 20:06:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-10-21 20:06:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 54 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-21 20:06:45,298 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 23 [2021-10-21 20:06:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:45,298 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-21 20:06:45,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-21 20:06:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 20:06:45,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:45,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:45,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 20:06:45,299 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrncmpErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:45,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1704080630, now seen corresponding path program 1 times [2021-10-21 20:06:45,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:45,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868240118] [2021-10-21 20:06:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:45,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:45,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:45,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:45,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868240118] [2021-10-21 20:06:45,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868240118] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:45,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:45,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:06:45,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021203797] [2021-10-21 20:06:45,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:06:45,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:06:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:06:45,509 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:45,829 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-10-21 20:06:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:06:45,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-21 20:06:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:45,830 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:06:45,830 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 20:06:45,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:06:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 20:06:45,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-10-21 20:06:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-10-21 20:06:45,834 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 25 [2021-10-21 20:06:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:45,834 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-10-21 20:06:45,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-10-21 20:06:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 20:06:45,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:45,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 20:06:45,836 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrncmpErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1704080629, now seen corresponding path program 1 times [2021-10-21 20:06:45,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:45,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133406372] [2021-10-21 20:06:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:45,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:45,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:45,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:45,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133406372] [2021-10-21 20:06:45,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133406372] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:45,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:45,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:06:45,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035499632] [2021-10-21 20:06:45,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:06:45,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:45,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:06:45,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:06:45,912 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:46,044 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-21 20:06:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:06:46,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-21 20:06:46,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:46,045 INFO L225 Difference]: With dead ends: 60 [2021-10-21 20:06:46,046 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 20:06:46,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:06:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 20:06:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-21 20:06:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-10-21 20:06:46,048 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2021-10-21 20:06:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:46,049 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-10-21 20:06:46,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-10-21 20:06:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:06:46,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:46,052 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:46,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 20:06:46,052 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:46,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1505322102, now seen corresponding path program 1 times [2021-10-21 20:06:46,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:46,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770372980] [2021-10-21 20:06:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:46,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:46,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:46,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:46,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770372980] [2021-10-21 20:06:46,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770372980] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:46,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:46,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:06:46,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358460413] [2021-10-21 20:06:46,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:06:46,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:06:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:06:46,312 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:46,602 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-10-21 20:06:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:06:46,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-21 20:06:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:46,604 INFO L225 Difference]: With dead ends: 76 [2021-10-21 20:06:46,604 INFO L226 Difference]: Without dead ends: 52 [2021-10-21 20:06:46,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-21 20:06:46,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-21 20:06:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-21 20:06:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-10-21 20:06:46,607 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 27 [2021-10-21 20:06:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:46,607 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-10-21 20:06:46,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-10-21 20:06:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:06:46,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:46,608 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:46,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 20:06:46,608 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1928023928, now seen corresponding path program 1 times [2021-10-21 20:06:46,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:46,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922734623] [2021-10-21 20:06:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:46,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:46,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:46,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922734623] [2021-10-21 20:06:46,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922734623] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:46,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:46,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 20:06:46,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237368438] [2021-10-21 20:06:46,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:06:46,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:06:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:06:46,857 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:47,158 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-21 20:06:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:06:47,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-21 20:06:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:47,164 INFO L225 Difference]: With dead ends: 79 [2021-10-21 20:06:47,164 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 20:06:47,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:06:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 20:06:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-10-21 20:06:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-10-21 20:06:47,168 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 27 [2021-10-21 20:06:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:47,168 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-10-21 20:06:47,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-10-21 20:06:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 20:06:47,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:47,169 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 20:06:47,169 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1331508539, now seen corresponding path program 1 times [2021-10-21 20:06:47,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:47,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829375618] [2021-10-21 20:06:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:47,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:47,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:47,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:47,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829375618] [2021-10-21 20:06:47,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829375618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:47,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662660325] [2021-10-21 20:06:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:47,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:47,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:47,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:47,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:06:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:47,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 20:06:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:47,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662660325] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:47,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:06:47,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-10-21 20:06:47,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692962291] [2021-10-21 20:06:47,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 20:06:47,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 20:06:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:06:47,787 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:48,233 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-10-21 20:06:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:06:48,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-10-21 20:06:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:48,238 INFO L225 Difference]: With dead ends: 72 [2021-10-21 20:06:48,238 INFO L226 Difference]: Without dead ends: 72 [2021-10-21 20:06:48,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-10-21 20:06:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-21 20:06:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-10-21 20:06:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-10-21 20:06:48,241 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 31 [2021-10-21 20:06:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:48,241 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-10-21 20:06:48,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-10-21 20:06:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 20:06:48,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:48,242 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:48,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:48,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:48,442 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -320547492, now seen corresponding path program 1 times [2021-10-21 20:06:48,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:48,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995671650] [2021-10-21 20:06:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:48,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:48,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:48,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995671650] [2021-10-21 20:06:48,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995671650] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:48,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:48,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-21 20:06:48,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394584859] [2021-10-21 20:06:48,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 20:06:48,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:48,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 20:06:48,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:06:48,751 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:49,156 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-10-21 20:06:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:06:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-10-21 20:06:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:49,157 INFO L225 Difference]: With dead ends: 74 [2021-10-21 20:06:49,157 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 20:06:49,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-10-21 20:06:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 20:06:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-21 20:06:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-10-21 20:06:49,161 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 33 [2021-10-21 20:06:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:49,161 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-10-21 20:06:49,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-10-21 20:06:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 20:06:49,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:49,162 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:49,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 20:06:49,162 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:49,163 INFO L82 PathProgramCache]: Analyzing trace with hash -258507878, now seen corresponding path program 1 times [2021-10-21 20:06:49,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:49,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072124855] [2021-10-21 20:06:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:49,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:49,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:49,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072124855] [2021-10-21 20:06:49,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072124855] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:49,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:49,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-21 20:06:49,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979266720] [2021-10-21 20:06:49,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 20:06:49,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 20:06:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:06:49,530 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:49,970 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-10-21 20:06:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 20:06:49,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-10-21 20:06:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:49,972 INFO L225 Difference]: With dead ends: 70 [2021-10-21 20:06:49,972 INFO L226 Difference]: Without dead ends: 58 [2021-10-21 20:06:49,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-10-21 20:06:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-21 20:06:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-10-21 20:06:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-10-21 20:06:49,975 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 33 [2021-10-21 20:06:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:49,975 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-10-21 20:06:49,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-10-21 20:06:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:06:49,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:49,976 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:49,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 20:06:49,976 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:49,977 INFO L82 PathProgramCache]: Analyzing trace with hash -912468131, now seen corresponding path program 1 times [2021-10-21 20:06:49,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:49,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179229072] [2021-10-21 20:06:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:49,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:50,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:50,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:50,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179229072] [2021-10-21 20:06:50,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179229072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:50,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610440558] [2021-10-21 20:06:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:50,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:50,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:50,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:50,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:06:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 20:06:50,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:50,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610440558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:50,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:06:50,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-10-21 20:06:50,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628375232] [2021-10-21 20:06:50,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:06:50,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:06:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:06:50,689 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:51,068 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-10-21 20:06:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:06:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-10-21 20:06:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:51,070 INFO L225 Difference]: With dead ends: 58 [2021-10-21 20:06:51,070 INFO L226 Difference]: Without dead ends: 58 [2021-10-21 20:06:51,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-10-21 20:06:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-21 20:06:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-10-21 20:06:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.173913043478261) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-10-21 20:06:51,074 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2021-10-21 20:06:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:51,074 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-10-21 20:06:51,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-10-21 20:06:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:06:51,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:51,075 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:51,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:51,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:51,283 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrncmpErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:51,283 INFO L82 PathProgramCache]: Analyzing trace with hash -708544290, now seen corresponding path program 1 times [2021-10-21 20:06:51,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:51,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194510967] [2021-10-21 20:06:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:51,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:51,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:51,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:51,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194510967] [2021-10-21 20:06:51,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194510967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:51,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132633711] [2021-10-21 20:06:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:51,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:51,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:51,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:51,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:06:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 20:06:51,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:51,789 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 20:06:51,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:06:51,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-21 20:06:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:52,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132633711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:52,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:06:52,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-10-21 20:06:52,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658659493] [2021-10-21 20:06:52,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:06:52,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:52,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:06:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:06:52,246 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:52,751 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-10-21 20:06:52,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:06:52,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-10-21 20:06:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:52,755 INFO L225 Difference]: With dead ends: 63 [2021-10-21 20:06:52,755 INFO L226 Difference]: Without dead ends: 63 [2021-10-21 20:06:52,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-10-21 20:06:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-21 20:06:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-10-21 20:06:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-10-21 20:06:52,759 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 39 [2021-10-21 20:06:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:52,759 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-10-21 20:06:52,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-10-21 20:06:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-21 20:06:52,761 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:52,761 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:52,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:52,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 20:06:52,972 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrncmpErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1988461663, now seen corresponding path program 1 times [2021-10-21 20:06:52,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:52,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443332561] [2021-10-21 20:06:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:52,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:53,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:53,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:53,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443332561] [2021-10-21 20:06:53,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443332561] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:53,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452442723] [2021-10-21 20:06:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:53,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:53,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:53,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:06:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 20:06:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:53,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452442723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:53,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:06:53,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-10-21 20:06:53,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153583856] [2021-10-21 20:06:53,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 20:06:53,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 20:06:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:06:53,768 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:54,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:54,240 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-10-21 20:06:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:06:54,240 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-10-21 20:06:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:54,241 INFO L225 Difference]: With dead ends: 67 [2021-10-21 20:06:54,241 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 20:06:54,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-10-21 20:06:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 20:06:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-10-21 20:06:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-10-21 20:06:54,244 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 41 [2021-10-21 20:06:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:54,245 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-10-21 20:06:54,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-10-21 20:06:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 20:06:54,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:54,246 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:54,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:54,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 20:06:54,471 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:54,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash -82412129, now seen corresponding path program 1 times [2021-10-21 20:06:54,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:54,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539561323] [2021-10-21 20:06:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:54,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:54,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:54,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:54,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539561323] [2021-10-21 20:06:54,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539561323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:54,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481129592] [2021-10-21 20:06:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:54,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:54,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:54,789 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:54,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:06:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-21 20:06:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:55,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:06:56,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-21 20:06:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:06:56,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481129592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:56,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:06:56,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-10-21 20:06:56,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342230744] [2021-10-21 20:06:56,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 20:06:56,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:56,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 20:06:56,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-10-21 20:06:56,017 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:57,825 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2021-10-21 20:06:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-21 20:06:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-10-21 20:06:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:57,827 INFO L225 Difference]: With dead ends: 142 [2021-10-21 20:06:57,827 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 20:06:57,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1644.9ms TimeCoverageRelationStatistics Valid=365, Invalid=3295, Unknown=0, NotChecked=0, Total=3660 [2021-10-21 20:06:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 20:06:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-10-21 20:06:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-10-21 20:06:57,831 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 43 [2021-10-21 20:06:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:57,832 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-10-21 20:06:57,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-10-21 20:06:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 20:06:57,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:57,833 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:57,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:58,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 20:06:58,047 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:58,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1162320101, now seen corresponding path program 2 times [2021-10-21 20:06:58,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:58,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497299246] [2021-10-21 20:06:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:58,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:58,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:06:58,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:58,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497299246] [2021-10-21 20:06:58,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497299246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:58,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131464775] [2021-10-21 20:06:58,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:06:58,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:58,259 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:58,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:06:58,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:06:58,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:06:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 20:06:58,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:06:58,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131464775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:58,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:06:58,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-10-21 20:06:58,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751044641] [2021-10-21 20:06:58,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 20:06:58,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 20:06:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:06:58,907 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:59,414 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-10-21 20:06:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:06:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-21 20:06:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:59,417 INFO L225 Difference]: With dead ends: 75 [2021-10-21 20:06:59,418 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 20:06:59,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-10-21 20:06:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 20:06:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-10-21 20:06:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-21 20:06:59,422 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 51 [2021-10-21 20:06:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:59,423 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-21 20:06:59,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:06:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-21 20:06:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 20:06:59,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:59,424 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:59,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:59,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 20:06:59,640 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:06:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:59,640 INFO L82 PathProgramCache]: Analyzing trace with hash 298120838, now seen corresponding path program 2 times [2021-10-21 20:06:59,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:59,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103880566] [2021-10-21 20:06:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:59,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:59,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:06:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:06:59,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:59,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103880566] [2021-10-21 20:06:59,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103880566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:59,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809611252] [2021-10-21 20:06:59,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:06:59,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:59,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:59,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:59,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:07:00,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:07:00,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 20:07:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:07:00,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809611252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:00,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:07:00,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-10-21 20:07:00,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785488377] [2021-10-21 20:07:00,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 20:07:00,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 20:07:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:07:00,526 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 18 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:01,083 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-10-21 20:07:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:07:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 18 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-10-21 20:07:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:01,085 INFO L225 Difference]: With dead ends: 71 [2021-10-21 20:07:01,085 INFO L226 Difference]: Without dead ends: 71 [2021-10-21 20:07:01,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 388.4ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-10-21 20:07:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-21 20:07:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-21 20:07:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-10-21 20:07:01,089 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 53 [2021-10-21 20:07:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:01,089 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-10-21 20:07:01,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 18 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-10-21 20:07:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 20:07:01,090 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:01,090 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:01,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:01,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:01,304 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrncmpErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1268682297, now seen corresponding path program 2 times [2021-10-21 20:07:01,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:01,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589551306] [2021-10-21 20:07:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:01,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:01,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:07:01,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:01,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589551306] [2021-10-21 20:07:01,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589551306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:01,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260875174] [2021-10-21 20:07:01,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:07:01,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:01,571 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:01,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 20:07:01,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 20:07:01,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:01,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:07:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 20:07:02,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260875174] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:07:02,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:02,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2021-10-21 20:07:02,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869697618] [2021-10-21 20:07:02,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:07:02,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:02,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:07:02,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:07:02,133 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:02,163 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-10-21 20:07:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:07:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-21 20:07:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:02,164 INFO L225 Difference]: With dead ends: 69 [2021-10-21 20:07:02,164 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 20:07:02,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:07:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 20:07:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-10-21 20:07:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-10-21 20:07:02,168 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 55 [2021-10-21 20:07:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:02,169 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-10-21 20:07:02,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-10-21 20:07:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 20:07:02,170 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:02,170 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:02,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:02,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:02,395 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrncmpErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:02,395 INFO L82 PathProgramCache]: Analyzing trace with hash 566748936, now seen corresponding path program 2 times [2021-10-21 20:07:02,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:02,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136183869] [2021-10-21 20:07:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:02,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:07:02,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:02,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136183869] [2021-10-21 20:07:02,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136183869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:02,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366742882] [2021-10-21 20:07:02,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:07:02,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:02,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:02,662 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:02,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 20:07:03,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 20:07:03,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:07:03,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 20:07:03,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366742882] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:07:03,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:03,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 17 [2021-10-21 20:07:03,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653356929] [2021-10-21 20:07:03,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:07:03,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:03,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:07:03,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-21 20:07:03,245 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:03,295 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-10-21 20:07:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:07:03,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-10-21 20:07:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:03,296 INFO L225 Difference]: With dead ends: 66 [2021-10-21 20:07:03,296 INFO L226 Difference]: Without dead ends: 63 [2021-10-21 20:07:03,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:07:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-21 20:07:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-21 20:07:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-10-21 20:07:03,299 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2021-10-21 20:07:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:03,300 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-10-21 20:07:03,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-10-21 20:07:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 20:07:03,300 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:03,301 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:03,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:03,519 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash -548742648, now seen corresponding path program 3 times [2021-10-21 20:07:03,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:03,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504630485] [2021-10-21 20:07:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:03,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:03,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:07:03,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:03,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504630485] [2021-10-21 20:07:03,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504630485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:03,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506619367] [2021-10-21 20:07:03,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:07:03,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:03,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:03,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:03,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 20:07:04,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:07:04,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:04,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-21 20:07:04,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:04,320 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:07:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:07:04,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 20:07:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-10-21 20:07:05,996 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-21 20:07:05,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 29 [2021-10-21 20:07:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:07:06,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506619367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:06,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:07:06,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2021-10-21 20:07:06,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229602032] [2021-10-21 20:07:06,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 20:07:06,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 20:07:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-10-21 20:07:06,019 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:08,315 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2021-10-21 20:07:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-21 20:07:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-10-21 20:07:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:08,316 INFO L225 Difference]: With dead ends: 178 [2021-10-21 20:07:08,316 INFO L226 Difference]: Without dead ends: 77 [2021-10-21 20:07:08,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2234.4ms TimeCoverageRelationStatistics Valid=464, Invalid=4792, Unknown=0, NotChecked=0, Total=5256 [2021-10-21 20:07:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-21 20:07:08,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-21 20:07:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-10-21 20:07:08,323 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2021-10-21 20:07:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:08,323 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-10-21 20:07:08,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-10-21 20:07:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 20:07:08,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:08,324 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:08,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:08,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 20:07:08,531 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1002719566, now seen corresponding path program 4 times [2021-10-21 20:07:08,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:08,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419385822] [2021-10-21 20:07:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:08,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:08,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:07:08,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:08,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419385822] [2021-10-21 20:07:08,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419385822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:08,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606794730] [2021-10-21 20:07:08,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:07:08,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:08,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:08,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:07:09,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:07:09,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:09,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-21 20:07:09,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:09,397 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:07:09,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:07:09,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:07:10,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 20:07:10,179 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-21 20:07:10,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-21 20:07:11,274 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-10-21 20:07:11,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2021-10-21 20:07:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:07:11,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606794730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:11,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:07:11,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-21 20:07:11,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252247221] [2021-10-21 20:07:11,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 20:07:11,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 20:07:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2021-10-21 20:07:11,433 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:13,513 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-10-21 20:07:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 20:07:13,514 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-10-21 20:07:13,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:13,515 INFO L225 Difference]: With dead ends: 81 [2021-10-21 20:07:13,515 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 20:07:13,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1485.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 20:07:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 20:07:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-10-21 20:07:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-10-21 20:07:13,519 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 67 [2021-10-21 20:07:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:13,520 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-10-21 20:07:13,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-10-21 20:07:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-21 20:07:13,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:13,521 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:13,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:13,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 20:07:13,722 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:13,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1540829359, now seen corresponding path program 3 times [2021-10-21 20:07:13,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:13,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560274463] [2021-10-21 20:07:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:13,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:14,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:07:14,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:14,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560274463] [2021-10-21 20:07:14,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560274463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:14,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968660023] [2021-10-21 20:07:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:07:14,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:14,010 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:14,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:07:14,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:07:14,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 20:07:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:14,560 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:07:14,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:07:14,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-21 20:07:15,041 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-10-21 20:07:15,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 36 [2021-10-21 20:07:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 20:07:15,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968660023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:15,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:07:15,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-10-21 20:07:15,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887842484] [2021-10-21 20:07:15,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 20:07:15,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:15,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 20:07:15,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:07:15,196 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:16,575 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-10-21 20:07:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-21 20:07:16,576 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-10-21 20:07:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:16,576 INFO L225 Difference]: With dead ends: 79 [2021-10-21 20:07:16,576 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 20:07:16,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1415.3ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 20:07:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 20:07:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-10-21 20:07:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-10-21 20:07:16,580 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2021-10-21 20:07:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:16,580 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-10-21 20:07:16,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-10-21 20:07:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-21 20:07:16,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:16,582 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:16,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:16,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 20:07:16,787 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1982402929, now seen corresponding path program 5 times [2021-10-21 20:07:16,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:16,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460915577] [2021-10-21 20:07:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:16,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:07:17,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:17,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460915577] [2021-10-21 20:07:17,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460915577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:17,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804020049] [2021-10-21 20:07:17,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:07:17,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:17,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:17,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:07:17,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-21 20:07:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 20:07:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:17,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:07:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:07:18,335 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 20:07:18,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 20:07:19,614 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 20:07:19,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-21 20:07:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:07:19,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804020049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:19,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:07:19,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-10-21 20:07:19,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716998882] [2021-10-21 20:07:19,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 20:07:19,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 20:07:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2021-10-21 20:07:19,629 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 28 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:41,300 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2021-10-21 20:07:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 20:07:41,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 28 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-10-21 20:07:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:41,302 INFO L225 Difference]: With dead ends: 133 [2021-10-21 20:07:41,302 INFO L226 Difference]: Without dead ends: 83 [2021-10-21 20:07:41,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 21334.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 20:07:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-21 20:07:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-10-21 20:07:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-10-21 20:07:41,306 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 75 [2021-10-21 20:07:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:41,306 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-10-21 20:07:41,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 28 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-10-21 20:07:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 20:07:41,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:41,308 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:41,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-21 20:07:41,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 20:07:41,523 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -723077580, now seen corresponding path program 6 times [2021-10-21 20:07:41,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:41,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955028893] [2021-10-21 20:07:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:41,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:07:41,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:41,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955028893] [2021-10-21 20:07:41,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955028893] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:41,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676960198] [2021-10-21 20:07:41,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:07:41,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:41,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:41,840 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:41,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 20:07:42,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 20:07:42,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-21 20:07:42,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:07:43,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676960198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:43,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:07:43,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-10-21 20:07:43,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37700946] [2021-10-21 20:07:43,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-21 20:07:43,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-21 20:07:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-10-21 20:07:43,106 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:43,831 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-10-21 20:07:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 20:07:43,831 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-10-21 20:07:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:43,832 INFO L225 Difference]: With dead ends: 91 [2021-10-21 20:07:43,832 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 20:07:43,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 665.1ms TimeCoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 20:07:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 20:07:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-10-21 20:07:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-10-21 20:07:43,835 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 79 [2021-10-21 20:07:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:43,836 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-10-21 20:07:43,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-10-21 20:07:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-21 20:07:43,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:43,837 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:43,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:44,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:44,051 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash -509921193, now seen corresponding path program 7 times [2021-10-21 20:07:44,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:44,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732405261] [2021-10-21 20:07:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:44,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:44,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 70 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:07:44,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:44,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732405261] [2021-10-21 20:07:44,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732405261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:44,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833201417] [2021-10-21 20:07:44,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:07:44,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:44,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:44,379 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:44,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 20:07:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:45,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 20:07:45,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:45,329 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:07:45,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:07:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 78 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:07:45,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833201417] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:45,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:07:45,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-10-21 20:07:45,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147889512] [2021-10-21 20:07:45,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 20:07:45,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 20:07:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-10-21 20:07:45,967 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 32 states, 32 states have (on average 4.125) internal successors, (132), 29 states have internal predecessors, (132), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:46,568 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2021-10-21 20:07:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 20:07:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 29 states have internal predecessors, (132), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-10-21 20:07:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:46,570 INFO L225 Difference]: With dead ends: 136 [2021-10-21 20:07:46,570 INFO L226 Difference]: Without dead ends: 95 [2021-10-21 20:07:46,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 585.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 20:07:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-21 20:07:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-10-21 20:07:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-10-21 20:07:46,574 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2021-10-21 20:07:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:46,574 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-10-21 20:07:46,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 29 states have internal predecessors, (132), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:07:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-10-21 20:07:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-21 20:07:46,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:46,575 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:46,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:46,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 20:07:46,783 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:07:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash -233954342, now seen corresponding path program 8 times [2021-10-21 20:07:46,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:46,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599357825] [2021-10-21 20:07:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:46,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:47,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:07:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:07:47,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:47,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599357825] [2021-10-21 20:07:47,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599357825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:47,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499619885] [2021-10-21 20:07:47,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:07:47,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:47,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:47,431 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:47,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 20:07:48,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:07:48,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:48,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-21 20:07:48,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:48,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:07:48,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:07:48,964 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 20:07:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 20:07:50,486 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 20:07:50,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-21 20:07:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:07:50,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499619885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:50,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:07:50,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-10-21 20:07:50,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319333738] [2021-10-21 20:07:50,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-21 20:07:50,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-21 20:07:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 20:07:50,501 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 33 states have internal predecessors, (142), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:20,595 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-10-21 20:08:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 20:08:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 33 states have internal predecessors, (142), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-10-21 20:08:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:20,597 INFO L225 Difference]: With dead ends: 161 [2021-10-21 20:08:20,597 INFO L226 Difference]: Without dead ends: 99 [2021-10-21 20:08:20,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 29835.4ms TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 20:08:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-21 20:08:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-10-21 20:08:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-10-21 20:08:20,602 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2021-10-21 20:08:20,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:20,602 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-10-21 20:08:20,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 33 states have internal predecessors, (142), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-10-21 20:08:20,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 20:08:20,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:20,603 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:20,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:20,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 20:08:20,804 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:08:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2053628573, now seen corresponding path program 9 times [2021-10-21 20:08:20,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:20,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432518919] [2021-10-21 20:08:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:20,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:21,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:08:21,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:21,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432518919] [2021-10-21 20:08:21,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432518919] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:21,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742794640] [2021-10-21 20:08:21,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:08:21,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:21,222 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:21,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 20:08:22,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 20:08:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-21 20:08:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:22,605 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:08:22,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:08:23,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 20:08:23,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-10-21 20:08:24,104 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 20:08:24,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-10-21 20:08:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:08:24,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742794640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:24,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:24,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 38 [2021-10-21 20:08:24,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093883448] [2021-10-21 20:08:24,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 20:08:24,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:24,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 20:08:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:08:24,140 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 35 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:28,186 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2021-10-21 20:08:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-21 20:08:28,187 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 35 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-10-21 20:08:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:28,188 INFO L225 Difference]: With dead ends: 158 [2021-10-21 20:08:28,188 INFO L226 Difference]: Without dead ends: 114 [2021-10-21 20:08:28,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2838.3ms TimeCoverageRelationStatistics Valid=595, Invalid=5411, Unknown=0, NotChecked=0, Total=6006 [2021-10-21 20:08:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-21 20:08:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-10-21 20:08:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-10-21 20:08:28,194 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 95 [2021-10-21 20:08:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:28,194 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-10-21 20:08:28,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 35 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-10-21 20:08:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-21 20:08:28,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:28,196 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:28,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:28,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 20:08:28,396 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:08:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 811012419, now seen corresponding path program 10 times [2021-10-21 20:08:28,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:28,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025003901] [2021-10-21 20:08:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:28,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:28,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:08:28,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:28,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025003901] [2021-10-21 20:08:28,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025003901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:28,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971229497] [2021-10-21 20:08:28,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:08:28,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:28,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:28,907 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:28,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 20:08:29,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:08:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:29,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-21 20:08:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:29,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:08:29,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-21 20:08:30,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-21 20:08:30,702 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-10-21 20:08:30,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-10-21 20:08:32,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 20:08:32,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-10-21 20:08:32,174 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-10-21 20:08:32,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-10-21 20:08:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 112 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:08:32,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971229497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:32,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:32,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-10-21 20:08:32,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212217297] [2021-10-21 20:08:32,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 20:08:32,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 20:08:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 20:08:32,186 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 39 states, 39 states have (on average 4.256410256410256) internal successors, (166), 36 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:00,181 WARN L207 SmtUtils]: Spent 8.69 s on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-10-21 20:09:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:03,030 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2021-10-21 20:09:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 20:09:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.256410256410256) internal successors, (166), 36 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-10-21 20:09:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:03,032 INFO L225 Difference]: With dead ends: 189 [2021-10-21 20:09:03,032 INFO L226 Difference]: Without dead ends: 115 [2021-10-21 20:09:03,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 22572.9ms TimeCoverageRelationStatistics Valid=359, Invalid=3673, Unknown=0, NotChecked=0, Total=4032 [2021-10-21 20:09:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-21 20:09:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2021-10-21 20:09:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-10-21 20:09:03,037 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2021-10-21 20:09:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:03,037 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-10-21 20:09:03,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.256410256410256) internal successors, (166), 36 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-10-21 20:09:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-21 20:09:03,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:03,039 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:03,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-21 20:09:03,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:03,252 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:09:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1792600582, now seen corresponding path program 11 times [2021-10-21 20:09:03,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:03,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137325282] [2021-10-21 20:09:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:03,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:03,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:09:03,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:03,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137325282] [2021-10-21 20:09:03,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137325282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:03,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408593407] [2021-10-21 20:09:03,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:09:03,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:03,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:03,701 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:03,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 20:09:05,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-21 20:09:05,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:05,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-21 20:09:05,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:09:06,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408593407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:06,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:06,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 30 [2021-10-21 20:09:06,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842698131] [2021-10-21 20:09:06,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 20:09:06,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:06,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 20:09:06,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-10-21 20:09:06,539 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 31 states, 30 states have (on average 4.533333333333333) internal successors, (136), 28 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:07,482 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2021-10-21 20:09:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 20:09:07,482 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.533333333333333) internal successors, (136), 28 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-10-21 20:09:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:07,483 INFO L225 Difference]: With dead ends: 123 [2021-10-21 20:09:07,483 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 20:09:07,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 20:09:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 20:09:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2021-10-21 20:09:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-10-21 20:09:07,489 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 111 [2021-10-21 20:09:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:07,489 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-10-21 20:09:07,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.533333333333333) internal successors, (136), 28 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-10-21 20:09:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 20:09:07,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:07,491 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:07,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:07,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-21 20:09:07,701 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:09:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1479706071, now seen corresponding path program 12 times [2021-10-21 20:09:07,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:07,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103305129] [2021-10-21 20:09:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:07,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:08,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 152 proven. 68 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:08,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:08,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103305129] [2021-10-21 20:09:08,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103305129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:08,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196844764] [2021-10-21 20:09:08,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:09:08,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:08,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:08,123 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:08,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 20:09:09,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-21 20:09:09,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-21 20:09:09,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:09,624 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:09:09,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:09:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 169 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:10,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196844764] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:10,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:10,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2021-10-21 20:09:10,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506013751] [2021-10-21 20:09:10,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 20:09:10,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 20:09:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 20:09:10,782 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 36 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:11,589 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-10-21 20:09:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 20:09:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 36 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-10-21 20:09:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:11,591 INFO L225 Difference]: With dead ends: 184 [2021-10-21 20:09:11,591 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 20:09:11,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 794.0ms TimeCoverageRelationStatistics Valid=370, Invalid=2080, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 20:09:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 20:09:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2021-10-21 20:09:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2021-10-21 20:09:11,596 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2021-10-21 20:09:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:11,596 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2021-10-21 20:09:11,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 36 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2021-10-21 20:09:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-21 20:09:11,597 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:11,597 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:11,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:11,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-21 20:09:11,807 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:09:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1184835156, now seen corresponding path program 13 times [2021-10-21 20:09:11,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:11,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468794610] [2021-10-21 20:09:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:11,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:12,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:12,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:12,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468794610] [2021-10-21 20:09:12,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468794610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:12,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871978673] [2021-10-21 20:09:12,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:09:12,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:12,695 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:12,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 20:09:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:14,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-21 20:09:14,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:14,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:09:14,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:09:14,806 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 20:09:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 20:09:16,976 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 20:09:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-21 20:09:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:16,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871978673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:16,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:16,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-10-21 20:09:16,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350222953] [2021-10-21 20:09:16,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-21 20:09:16,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-21 20:09:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 20:09:16,990 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 40 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:50,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:50,864 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2021-10-21 20:09:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 20:09:50,864 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 40 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-10-21 20:09:50,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:50,865 INFO L225 Difference]: With dead ends: 217 [2021-10-21 20:09:50,865 INFO L226 Difference]: Without dead ends: 131 [2021-10-21 20:09:50,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 33052.0ms TimeCoverageRelationStatistics Valid=216, Invalid=2976, Unknown=0, NotChecked=0, Total=3192 [2021-10-21 20:09:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-21 20:09:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-10-21 20:09:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-10-21 20:09:50,870 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 123 [2021-10-21 20:09:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:50,870 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-10-21 20:09:50,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 40 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-10-21 20:09:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 20:09:50,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:50,872 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:50,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:51,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:51,087 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:09:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1768502161, now seen corresponding path program 14 times [2021-10-21 20:09:51,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:51,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581475361] [2021-10-21 20:09:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:51,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:51,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 45 proven. 221 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:51,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:51,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581475361] [2021-10-21 20:09:51,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581475361] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:51,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171471219] [2021-10-21 20:09:51,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:09:51,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:51,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:51,593 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:51,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 20:09:52,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:09:52,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:52,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-21 20:09:52,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 66 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:53,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171471219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:53,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:53,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-10-21 20:09:53,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365982700] [2021-10-21 20:09:53,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 20:09:53,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 20:09:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 20:09:53,582 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 32 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:54,565 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2021-10-21 20:09:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 20:09:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 32 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-10-21 20:09:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:54,567 INFO L225 Difference]: With dead ends: 139 [2021-10-21 20:09:54,567 INFO L226 Difference]: Without dead ends: 139 [2021-10-21 20:09:54,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 719.3ms TimeCoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 20:09:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-21 20:09:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2021-10-21 20:09:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2021-10-21 20:09:54,570 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 127 [2021-10-21 20:09:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:54,571 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2021-10-21 20:09:54,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 32 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2021-10-21 20:09:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-21 20:09:54,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:54,572 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:54,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:54,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:54,787 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:09:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:54,787 INFO L82 PathProgramCache]: Analyzing trace with hash 10150802, now seen corresponding path program 15 times [2021-10-21 20:09:54,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:54,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932019565] [2021-10-21 20:09:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:54,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:55,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 205 proven. 93 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:09:55,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:55,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932019565] [2021-10-21 20:09:55,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932019565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:55,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404870694] [2021-10-21 20:09:55,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:09:55,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:55,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:55,178 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:55,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 20:09:57,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-21 20:09:57,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:57,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-21 20:09:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:57,080 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:09:57,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:09:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 225 proven. 73 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:09:58,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404870694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:58,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:58,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2021-10-21 20:09:58,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385482462] [2021-10-21 20:09:58,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-21 20:09:58,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:58,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-21 20:09:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 20:09:58,159 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 40 states have internal predecessors, (204), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:58,787 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2021-10-21 20:09:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 20:09:58,787 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 40 states have internal predecessors, (204), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-10-21 20:09:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:58,789 INFO L225 Difference]: With dead ends: 208 [2021-10-21 20:09:58,789 INFO L226 Difference]: Without dead ends: 143 [2021-10-21 20:09:58,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=450, Invalid=2520, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 20:09:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-21 20:09:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-10-21 20:09:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2021-10-21 20:09:58,793 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 135 [2021-10-21 20:09:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:58,794 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2021-10-21 20:09:58,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 40 states have internal predecessors, (204), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2021-10-21 20:09:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-21 20:09:58,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:58,795 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:58,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:59,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-21 20:09:59,007 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:09:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:59,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1064796907, now seen corresponding path program 16 times [2021-10-21 20:09:59,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:59,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576341881] [2021-10-21 20:09:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:59,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:59,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:09:59,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:59,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576341881] [2021-10-21 20:09:59,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576341881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:59,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025298448] [2021-10-21 20:09:59,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:09:59,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:59,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:59,643 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:59,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 20:10:01,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:10:01,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-21 20:10:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:01,111 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:10:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:10:01,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:10:01,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-10-21 20:10:02,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:10:02,312 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 20:10:02,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-10-21 20:10:05,361 INFO L354 Elim1Store]: treesize reduction 125, result has 6.0 percent of original size [2021-10-21 20:10:05,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 41 [2021-10-21 20:10:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:10:05,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025298448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:05,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:05,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30] total 52 [2021-10-21 20:10:05,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717879757] [2021-10-21 20:10:05,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 20:10:05,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 20:10:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2535, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 20:10:05,378 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 49 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:11:00,745 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2021-10-21 20:11:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 20:11:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 49 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-10-21 20:11:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:11:00,747 INFO L225 Difference]: With dead ends: 245 [2021-10-21 20:11:00,747 INFO L226 Difference]: Without dead ends: 147 [2021-10-21 20:11:00,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 46895.7ms TimeCoverageRelationStatistics Valid=296, Invalid=5106, Unknown=0, NotChecked=0, Total=5402 [2021-10-21 20:11:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-21 20:11:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-10-21 20:11:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2021-10-21 20:11:00,752 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 139 [2021-10-21 20:11:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:11:00,753 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2021-10-21 20:11:00,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 49 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2021-10-21 20:11:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-21 20:11:00,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:11:00,755 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:11:00,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-21 20:11:00,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:11:00,983 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:11:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:11:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1728149032, now seen corresponding path program 17 times [2021-10-21 20:11:00,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:11:00,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956587089] [2021-10-21 20:11:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:11:00,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:11:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:11:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 66 proven. 286 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:11:01,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:11:01,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956587089] [2021-10-21 20:11:01,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956587089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:01,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635999085] [2021-10-21 20:11:01,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:11:01,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:11:01,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:11:01,632 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:11:01,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 20:11:04,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-21 20:11:04,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:11:04,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-21 20:11:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:11:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:11:05,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635999085] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:05,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:11:05,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 36 [2021-10-21 20:11:05,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504124936] [2021-10-21 20:11:05,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-21 20:11:05,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:11:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-21 20:11:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 20:11:05,724 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 37 states, 36 states have (on average 4.666666666666667) internal successors, (168), 34 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:11:06,688 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2021-10-21 20:11:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 20:11:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.666666666666667) internal successors, (168), 34 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-10-21 20:11:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:11:06,690 INFO L225 Difference]: With dead ends: 155 [2021-10-21 20:11:06,690 INFO L226 Difference]: Without dead ends: 155 [2021-10-21 20:11:06,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 935.9ms TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:11:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-21 20:11:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-10-21 20:11:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2021-10-21 20:11:06,694 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 143 [2021-10-21 20:11:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:11:06,695 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2021-10-21 20:11:06,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.666666666666667) internal successors, (168), 34 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2021-10-21 20:11:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-21 20:11:06,696 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:11:06,697 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:11:06,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 20:11:06,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-21 20:11:06,908 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:11:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:11:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 34023419, now seen corresponding path program 18 times [2021-10-21 20:11:06,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:11:06,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315681914] [2021-10-21 20:11:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:11:06,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:11:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:07,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:11:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 266 proven. 122 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:11:07,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:11:07,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315681914] [2021-10-21 20:11:07,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315681914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:07,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930173734] [2021-10-21 20:11:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:11:07,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:11:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:11:07,396 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:11:07,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 20:11:10,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-21 20:11:10,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:11:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-21 20:11:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:11:10,096 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:11:10,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:11:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 289 proven. 99 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:11:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930173734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:11,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:11:11,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 47 [2021-10-21 20:11:11,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593408709] [2021-10-21 20:11:11,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-21 20:11:11,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:11:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-21 20:11:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1845, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 20:11:11,452 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 47 states, 47 states have (on average 4.851063829787234) internal successors, (228), 44 states have internal predecessors, (228), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:11:12,151 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2021-10-21 20:11:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 20:11:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.851063829787234) internal successors, (228), 44 states have internal predecessors, (228), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-10-21 20:11:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:11:12,152 INFO L225 Difference]: With dead ends: 232 [2021-10-21 20:11:12,152 INFO L226 Difference]: Without dead ends: 159 [2021-10-21 20:11:12,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 889.5ms TimeCoverageRelationStatistics Valid=539, Invalid=3001, Unknown=0, NotChecked=0, Total=3540 [2021-10-21 20:11:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-21 20:11:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2021-10-21 20:11:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-10-21 20:11:12,157 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 151 [2021-10-21 20:11:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:11:12,157 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-10-21 20:11:12,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.851063829787234) internal successors, (228), 44 states have internal predecessors, (228), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-10-21 20:11:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-10-21 20:11:12,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:11:12,158 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:11:12,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 20:11:12,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-21 20:11:12,359 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:11:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:11:12,359 INFO L82 PathProgramCache]: Analyzing trace with hash 606796670, now seen corresponding path program 19 times [2021-10-21 20:11:12,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:11:12,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173003973] [2021-10-21 20:11:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:11:12,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:11:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:13,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:11:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:11:13,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:11:13,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173003973] [2021-10-21 20:11:13,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173003973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:13,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009323776] [2021-10-21 20:11:13,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:11:13,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:11:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:11:13,227 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:11:13,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 20:11:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:15,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-21 20:11:15,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:11:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:11:16,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:11:16,099 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 20:11:16,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 20:11:18,772 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 20:11:18,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-21 20:11:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:11:18,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009323776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:18,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:11:18,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2021-10-21 20:11:18,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727027319] [2021-10-21 20:11:18,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 20:11:18,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:11:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 20:11:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2427, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:11:18,783 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 51 states, 51 states have (on average 4.666666666666667) internal successors, (238), 48 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:01,535 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2021-10-21 20:12:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 20:12:01,536 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.666666666666667) internal successors, (238), 48 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-10-21 20:12:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:01,537 INFO L225 Difference]: With dead ends: 273 [2021-10-21 20:12:01,537 INFO L226 Difference]: Without dead ends: 163 [2021-10-21 20:12:01,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 41284.6ms TimeCoverageRelationStatistics Valid=252, Invalid=4170, Unknown=0, NotChecked=0, Total=4422 [2021-10-21 20:12:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-21 20:12:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-10-21 20:12:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-10-21 20:12:01,542 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2021-10-21 20:12:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:01,542 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-10-21 20:12:01,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.666666666666667) internal successors, (238), 48 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-10-21 20:12:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-10-21 20:12:01,544 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:01,544 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:12:01,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 20:12:01,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-21 20:12:01,759 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:12:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1200807359, now seen corresponding path program 20 times [2021-10-21 20:12:01,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:01,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010844275] [2021-10-21 20:12:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:01,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:02,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:12:02,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:02,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010844275] [2021-10-21 20:12:02,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010844275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:12:02,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87619099] [2021-10-21 20:12:02,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:12:02,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:12:02,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:12:02,551 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:12:02,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 20:12:04,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:12:04,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:12:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-21 20:12:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:12:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:12:06,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87619099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:12:06,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:12:06,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 40 [2021-10-21 20:12:06,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179776950] [2021-10-21 20:12:06,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-21 20:12:06,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-21 20:12:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 20:12:06,037 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 41 states, 40 states have (on average 4.6) internal successors, (184), 38 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:07,672 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2021-10-21 20:12:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 20:12:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.6) internal successors, (184), 38 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-10-21 20:12:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:07,674 INFO L225 Difference]: With dead ends: 171 [2021-10-21 20:12:07,675 INFO L226 Difference]: Without dead ends: 171 [2021-10-21 20:12:07,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1163.1ms TimeCoverageRelationStatistics Valid=334, Invalid=2746, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 20:12:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-21 20:12:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-10-21 20:12:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-10-21 20:12:07,680 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 159 [2021-10-21 20:12:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:07,681 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-10-21 20:12:07,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.6) internal successors, (184), 38 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-10-21 20:12:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-10-21 20:12:07,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:07,683 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:12:07,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 20:12:07,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:12:07,898 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:12:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1164920676, now seen corresponding path program 21 times [2021-10-21 20:12:07,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:07,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634387635] [2021-10-21 20:12:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:07,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 335 proven. 155 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:12:08,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:08,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634387635] [2021-10-21 20:12:08,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634387635] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:12:08,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748258782] [2021-10-21 20:12:08,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:12:08,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:12:08,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:12:08,537 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:12:08,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 20:12:12,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-21 20:12:12,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:12:12,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-21 20:12:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:12:12,710 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:12:12,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:12:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 361 proven. 129 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:12:14,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748258782] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:12:14,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:12:14,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 51 [2021-10-21 20:12:14,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342491073] [2021-10-21 20:12:14,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 20:12:14,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 20:12:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:12:14,394 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 51 states, 51 states have (on average 4.9411764705882355) internal successors, (252), 48 states have internal predecessors, (252), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:15,559 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2021-10-21 20:12:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 20:12:15,566 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.9411764705882355) internal successors, (252), 48 states have internal predecessors, (252), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-10-21 20:12:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:15,567 INFO L225 Difference]: With dead ends: 256 [2021-10-21 20:12:15,567 INFO L226 Difference]: Without dead ends: 175 [2021-10-21 20:12:15,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1081.2ms TimeCoverageRelationStatistics Valid=637, Invalid=3523, Unknown=0, NotChecked=0, Total=4160 [2021-10-21 20:12:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-21 20:12:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-10-21 20:12:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2021-10-21 20:12:15,571 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2021-10-21 20:12:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:15,571 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2021-10-21 20:12:15,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.9411764705882355) internal successors, (252), 48 states have internal predecessors, (252), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2021-10-21 20:12:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-21 20:12:15,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:15,573 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:12:15,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 20:12:15,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-21 20:12:15,773 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:12:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1839551719, now seen corresponding path program 22 times [2021-10-21 20:12:15,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:15,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51701898] [2021-10-21 20:12:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:15,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:16,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:12:16,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:16,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51701898] [2021-10-21 20:12:16,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51701898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:12:16,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396197772] [2021-10-21 20:12:16,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:12:16,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:12:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:12:16,868 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:12:16,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 20:12:19,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:12:19,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:12:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-21 20:12:19,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:12:19,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:12:19,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-21 20:12:21,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 20:12:21,511 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-21 20:12:21,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-21 20:12:24,800 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 20:12:24,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-10-21 20:12:24,812 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 20:12:24,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2021-10-21 20:12:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 352 proven. 171 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:12:24,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396197772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:12:24,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:12:24,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 54 [2021-10-21 20:12:24,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054275146] [2021-10-21 20:12:24,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-21 20:12:24,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-21 20:12:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2666, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 20:12:24,829 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 54 states, 54 states have (on average 4.851851851851852) internal successors, (262), 51 states have internal predecessors, (262), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:02,297 INFO L93 Difference]: Finished difference Result 301 states and 304 transitions. [2021-10-21 20:13:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 20:13:02,298 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.851851851851852) internal successors, (262), 51 states have internal predecessors, (262), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-10-21 20:13:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:02,300 INFO L225 Difference]: With dead ends: 301 [2021-10-21 20:13:02,300 INFO L226 Difference]: Without dead ends: 179 [2021-10-21 20:13:02,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 32152.5ms TimeCoverageRelationStatistics Valid=469, Invalid=6011, Unknown=0, NotChecked=0, Total=6480 [2021-10-21 20:13:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-21 20:13:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2021-10-21 20:13:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2021-10-21 20:13:02,306 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 171 [2021-10-21 20:13:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:02,306 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2021-10-21 20:13:02,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.851851851851852) internal successors, (262), 51 states have internal predecessors, (262), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2021-10-21 20:13:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-21 20:13:02,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:02,309 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:02,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:02,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:02,535 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:13:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash -432040534, now seen corresponding path program 23 times [2021-10-21 20:13:02,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:02,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790369272] [2021-10-21 20:13:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:02,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:03,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 120 proven. 440 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:13:03,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:03,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790369272] [2021-10-21 20:13:03,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790369272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:03,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321588861] [2021-10-21 20:13:03,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:13:03,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:03,353 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:03,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 20:13:07,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-10-21 20:13:07,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:13:07,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-21 20:13:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 153 proven. 407 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:13:08,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321588861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:08,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:13:08,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 39 [2021-10-21 20:13:08,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711929517] [2021-10-21 20:13:08,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-21 20:13:08,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-21 20:13:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 20:13:08,980 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 40 states, 39 states have (on average 5.717948717948718) internal successors, (223), 38 states have internal predecessors, (223), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:10,913 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2021-10-21 20:13:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 20:13:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.717948717948718) internal successors, (223), 38 states have internal predecessors, (223), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-10-21 20:13:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:10,915 INFO L225 Difference]: With dead ends: 187 [2021-10-21 20:13:10,915 INFO L226 Difference]: Without dead ends: 187 [2021-10-21 20:13:10,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1255.2ms TimeCoverageRelationStatistics Valid=261, Invalid=2819, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 20:13:10,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-21 20:13:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-10-21 20:13:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-10-21 20:13:10,920 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2021-10-21 20:13:10,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:10,921 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-10-21 20:13:10,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.717948717948718) internal successors, (223), 38 states have internal predecessors, (223), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:10,921 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-10-21 20:13:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-10-21 20:13:10,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:10,923 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:10,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:11,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:11,131 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:13:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:11,131 INFO L82 PathProgramCache]: Analyzing trace with hash 254820813, now seen corresponding path program 24 times [2021-10-21 20:13:11,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:11,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116232600] [2021-10-21 20:13:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:11,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:11,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 412 proven. 192 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:13:11,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:11,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116232600] [2021-10-21 20:13:11,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116232600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:11,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350391433] [2021-10-21 20:13:11,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:13:11,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:11,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:11,891 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:11,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 20:13:17,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-10-21 20:13:17,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:13:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-21 20:13:17,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:17,976 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:13:17,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:13:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 441 proven. 163 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:13:19,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350391433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:19,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:13:19,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 55 [2021-10-21 20:13:19,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534337282] [2021-10-21 20:13:19,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-21 20:13:19,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-21 20:13:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2523, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 20:13:19,957 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 52 states have internal predecessors, (276), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:21,068 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2021-10-21 20:13:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 20:13:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 52 states have internal predecessors, (276), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2021-10-21 20:13:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:21,070 INFO L225 Difference]: With dead ends: 280 [2021-10-21 20:13:21,070 INFO L226 Difference]: Without dead ends: 191 [2021-10-21 20:13:21,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1320.4ms TimeCoverageRelationStatistics Valid=744, Invalid=4086, Unknown=0, NotChecked=0, Total=4830 [2021-10-21 20:13:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-21 20:13:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2021-10-21 20:13:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2021-10-21 20:13:21,074 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 183 [2021-10-21 20:13:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:21,075 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2021-10-21 20:13:21,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 52 states have internal predecessors, (276), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2021-10-21 20:13:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-10-21 20:13:21,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:21,077 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:21,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:21,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-21 20:13:21,297 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:13:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash -782988976, now seen corresponding path program 25 times [2021-10-21 20:13:21,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:21,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472552820] [2021-10-21 20:13:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:21,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:22,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:13:22,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:22,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472552820] [2021-10-21 20:13:22,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472552820] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:22,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147283578] [2021-10-21 20:13:22,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:13:22,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:22,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:22,469 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:22,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 20:13:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:25,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 126 conjunts are in the unsatisfiable core [2021-10-21 20:13:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:25,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:13:26,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:13:27,040 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 20:13:27,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 20:13:30,543 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 20:13:30,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-21 20:13:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:13:30,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147283578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:30,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:13:30,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 59 [2021-10-21 20:13:30,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526264100] [2021-10-21 20:13:30,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-21 20:13:30,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:30,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-21 20:13:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 20:13:30,559 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 59 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 56 states have internal predecessors, (286), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:14:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:23,876 INFO L93 Difference]: Finished difference Result 329 states and 332 transitions. [2021-10-21 20:14:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 20:14:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 56 states have internal predecessors, (286), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2021-10-21 20:14:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:23,878 INFO L225 Difference]: With dead ends: 329 [2021-10-21 20:14:23,878 INFO L226 Difference]: Without dead ends: 195 [2021-10-21 20:14:23,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 50889.0ms TimeCoverageRelationStatistics Valid=288, Invalid=5564, Unknown=0, NotChecked=0, Total=5852 [2021-10-21 20:14:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-21 20:14:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2021-10-21 20:14:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:14:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2021-10-21 20:14:23,884 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 187 [2021-10-21 20:14:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:23,884 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2021-10-21 20:14:23,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 56 states have internal predecessors, (286), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:14:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2021-10-21 20:14:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-10-21 20:14:23,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:23,886 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:23,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:24,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-21 20:14:24,103 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:14:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1093475309, now seen corresponding path program 26 times [2021-10-21 20:14:24,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:24,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380785257] [2021-10-21 20:14:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:24,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:24,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 153 proven. 529 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:14:24,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:24,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380785257] [2021-10-21 20:14:24,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380785257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:24,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908743954] [2021-10-21 20:14:24,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:14:24,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:14:24,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:14:24,922 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:14:24,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-21 20:14:28,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:14:28,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:14:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 213 conjunts are in the unsatisfiable core [2021-10-21 20:14:28,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:14:31,414 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-21 20:14:31,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-10-21 20:14:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-21 20:14:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908743954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:31,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:14:31,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33] total 62 [2021-10-21 20:14:31,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057442643] [2021-10-21 20:14:31,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-21 20:14:31,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-21 20:14:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3611, Unknown=0, NotChecked=0, Total=3782 [2021-10-21 20:14:31,516 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand has 62 states, 62 states have (on average 4.741935483870968) internal successors, (294), 59 states have internal predecessors, (294), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:14:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:42,338 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2021-10-21 20:14:42,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-21 20:14:42,339 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 4.741935483870968) internal successors, (294), 59 states have internal predecessors, (294), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-10-21 20:14:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:42,341 INFO L225 Difference]: With dead ends: 302 [2021-10-21 20:14:42,341 INFO L226 Difference]: Without dead ends: 210 [2021-10-21 20:14:42,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 5831.4ms TimeCoverageRelationStatistics Valid=823, Invalid=13939, Unknown=0, NotChecked=0, Total=14762 [2021-10-21 20:14:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-21 20:14:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-10-21 20:14:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.015075376884422) internal successors, (202), 199 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:14:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2021-10-21 20:14:42,346 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 191 [2021-10-21 20:14:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:42,347 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2021-10-21 20:14:42,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 4.741935483870968) internal successors, (294), 59 states have internal predecessors, (294), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:14:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2021-10-21 20:14:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-10-21 20:14:42,349 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:42,349 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:42,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:42,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-21 20:14:42,563 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:14:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:42,563 INFO L82 PathProgramCache]: Analyzing trace with hash 781555897, now seen corresponding path program 27 times [2021-10-21 20:14:42,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:42,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138608053] [2021-10-21 20:14:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:42,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:43,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-21 20:14:43,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:43,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138608053] [2021-10-21 20:14:43,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138608053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:43,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331159207] [2021-10-21 20:14:43,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:14:43,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:14:43,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:14:43,803 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:14:43,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-21 20:14:51,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-10-21 20:14:51,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:14:51,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 166 conjunts are in the unsatisfiable core [2021-10-21 20:14:51,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:51,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:14:53,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:14:54,011 INFO L354 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2021-10-21 20:14:54,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-21 20:14:57,798 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-10-21 20:14:57,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-21 20:14:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 967 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:14:57,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331159207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:57,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:14:57,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 43] total 73 [2021-10-21 20:14:57,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145274065] [2021-10-21 20:14:57,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-21 20:14:57,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-21 20:14:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5059, Unknown=0, NotChecked=0, Total=5256 [2021-10-21 20:14:57,813 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 73 states, 73 states have (on average 4.794520547945205) internal successors, (350), 70 states have internal predecessors, (350), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:03,994 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2021-10-21 20:15:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-21 20:15:03,995 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.794520547945205) internal successors, (350), 70 states have internal predecessors, (350), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2021-10-21 20:15:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:03,996 INFO L225 Difference]: With dead ends: 357 [2021-10-21 20:15:03,996 INFO L226 Difference]: Without dead ends: 211 [2021-10-21 20:15:03,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 4804.2ms TimeCoverageRelationStatistics Valid=422, Invalid=9678, Unknown=0, NotChecked=0, Total=10100 [2021-10-21 20:15:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-21 20:15:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-10-21 20:15:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2021-10-21 20:15:04,001 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2021-10-21 20:15:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:04,002 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2021-10-21 20:15:04,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.794520547945205) internal successors, (350), 70 states have internal predecessors, (350), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2021-10-21 20:15:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-10-21 20:15:04,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:04,004 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:04,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:04,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-21 20:15:04,218 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:15:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:04,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1987834500, now seen corresponding path program 28 times [2021-10-21 20:15:04,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:04,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050528664] [2021-10-21 20:15:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:04,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:05,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:15:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 190 proven. 626 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-21 20:15:05,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:05,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050528664] [2021-10-21 20:15:05,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050528664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:05,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254697251] [2021-10-21 20:15:05,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:15:05,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:05,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:05,183 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:05,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-21 20:15:09,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:15:09,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 135 conjunts are in the unsatisfiable core [2021-10-21 20:15:09,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:09,537 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:15:09,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:15:09,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:15:12,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 20:15:12,178 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-21 20:15:12,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-21 20:15:16,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:15:16,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:15:16,523 INFO L354 Elim1Store]: treesize reduction 64, result has 13.5 percent of original size [2021-10-21 20:15:16,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 28 [2021-10-21 20:15:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 242 proven. 574 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-21 20:15:16,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254697251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:16,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:15:16,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 66 [2021-10-21 20:15:16,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321407379] [2021-10-21 20:15:16,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-10-21 20:15:16,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-10-21 20:15:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=4101, Unknown=0, NotChecked=0, Total=4422 [2021-10-21 20:15:16,756 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 67 states, 66 states have (on average 4.878787878787879) internal successors, (322), 64 states have internal predecessors, (322), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:24,476 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-10-21 20:15:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 20:15:24,477 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.878787878787879) internal successors, (322), 64 states have internal predecessors, (322), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2021-10-21 20:15:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:24,478 INFO L225 Difference]: With dead ends: 219 [2021-10-21 20:15:24,478 INFO L226 Difference]: Without dead ends: 219 [2021-10-21 20:15:24,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 5803.1ms TimeCoverageRelationStatistics Valid=623, Invalid=7567, Unknown=0, NotChecked=0, Total=8190 [2021-10-21 20:15:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-10-21 20:15:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2021-10-21 20:15:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.014218009478673) internal successors, (214), 211 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2021-10-21 20:15:24,482 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 207 [2021-10-21 20:15:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:24,483 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2021-10-21 20:15:24,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.878787878787879) internal successors, (322), 64 states have internal predecessors, (322), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2021-10-21 20:15:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-10-21 20:15:24,485 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:24,485 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:24,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:24,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-21 20:15:24,699 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:15:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1640970337, now seen corresponding path program 29 times [2021-10-21 20:15:24,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:24,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422145823] [2021-10-21 20:15:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:24,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:15:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 590 proven. 278 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-10-21 20:15:25,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:25,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422145823] [2021-10-21 20:15:25,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422145823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:25,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982337182] [2021-10-21 20:15:25,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:15:25,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:25,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:25,470 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 20:15:35,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-10-21 20:15:35,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:35,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-21 20:15:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:35,497 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:15:35,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:15:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 614 proven. 254 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-10-21 20:15:37,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982337182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:37,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:15:37,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2021-10-21 20:15:37,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107153199] [2021-10-21 20:15:37,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-10-21 20:15:37,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:37,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-10-21 20:15:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=3428, Unknown=0, NotChecked=0, Total=4032 [2021-10-21 20:15:37,274 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand has 64 states, 64 states have (on average 5.0625) internal successors, (324), 61 states have internal predecessors, (324), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:39,185 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2021-10-21 20:15:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-21 20:15:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 5.0625) internal successors, (324), 61 states have internal predecessors, (324), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2021-10-21 20:15:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:39,188 INFO L225 Difference]: With dead ends: 328 [2021-10-21 20:15:39,188 INFO L226 Difference]: Without dead ends: 223 [2021-10-21 20:15:39,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 1869.7ms TimeCoverageRelationStatistics Valid=1375, Invalid=6997, Unknown=0, NotChecked=0, Total=8372 [2021-10-21 20:15:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-21 20:15:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2021-10-21 20:15:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2021-10-21 20:15:39,194 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 215 [2021-10-21 20:15:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:39,194 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2021-10-21 20:15:39,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.0625) internal successors, (324), 61 states have internal predecessors, (324), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:15:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2021-10-21 20:15:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-10-21 20:15:39,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:39,196 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:39,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:39,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-21 20:15:39,397 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-21 20:15:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash 264602402, now seen corresponding path program 30 times [2021-10-21 20:15:39,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:39,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142474597] [2021-10-21 20:15:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:39,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:40,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:15:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-10-21 20:15:40,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:40,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142474597] [2021-10-21 20:15:40,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142474597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:40,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112516786] [2021-10-21 20:15:40,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:15:40,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:40,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:40,854 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:40,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-21 20:15:55,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-10-21 20:15:55,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-21 20:15:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:55,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:15:55,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-21 20:15:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-21 20:15:57,393 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-10-21 20:15:57,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-21 20:15:58,887 INFO L354 Elim1Store]: treesize reduction 43, result has 18.9 percent of original size [2021-10-21 20:15:58,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 24 [2021-10-21 20:15:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-10-21 20:15:59,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112516786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:59,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:15:59,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 9] total 43 [2021-10-21 20:15:59,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58169485] [2021-10-21 20:15:59,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-21 20:15:59,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:59,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-21 20:15:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1720, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 20:15:59,072 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 43 states, 43 states have (on average 4.72093023255814) internal successors, (203), 40 states have internal predecessors, (203), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:16:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:07,199 INFO L93 Difference]: Finished difference Result 384 states and 387 transitions. [2021-10-21 20:16:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-21 20:16:07,199 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.72093023255814) internal successors, (203), 40 states have internal predecessors, (203), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2021-10-21 20:16:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:07,200 INFO L225 Difference]: With dead ends: 384 [2021-10-21 20:16:07,200 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:16:07,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 6231.6ms TimeCoverageRelationStatistics Valid=746, Invalid=10596, Unknown=0, NotChecked=0, Total=11342 [2021-10-21 20:16:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:16:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:16:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:16:07,201 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-10-21 20:16:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:07,201 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:16:07,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.72093023255814) internal successors, (203), 40 states have internal predecessors, (203), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:16:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:16:07,202 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:16:07,204 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:16:07,205 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:16:07,205 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 20:16:07,205 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 20:16:07,205 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-21 20:16:07,205 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-21 20:16:07,205 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-21 20:16:07,205 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-21 20:16:07,205 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr0REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr1REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr2REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr3REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr4REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr5REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr6REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr7REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr8REQUIRES_VIOLATION [2021-10-21 20:16:07,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr9REQUIRES_VIOLATION [2021-10-21 20:16:07,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:07,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-10-21 20:16:07,412 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:16:07,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:16:07 BoogieIcfgContainer [2021-10-21 20:16:07,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:16:07,415 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:16:07,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:16:07,416 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:16:07,416 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:06:39" (3/4) ... [2021-10-21 20:16:07,420 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:16:07,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 20:16:07,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 20:16:07,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 20:16:07,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-21 20:16:07,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-21 20:16:07,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 20:16:07,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrncmp [2021-10-21 20:16:07,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-21 20:16:07,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2021-10-21 20:16:07,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-21 20:16:07,437 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:16:07,437 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:16:07,479 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:16:07,479 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:16:07,480 INFO L168 Benchmark]: Toolchain (without parser) took 569679.09 ms. Allocated memory was 94.4 MB in the beginning and 717.2 MB in the end (delta: 622.9 MB). Free memory was 72.5 MB in the beginning and 314.4 MB in the end (delta: -242.0 MB). Peak memory consumption was 378.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:07,481 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:16:07,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.53 ms. Allocated memory is still 94.4 MB. Free memory was 72.2 MB in the beginning and 63.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:07,481 INFO L168 Benchmark]: Boogie Preprocessor took 66.51 ms. Allocated memory is still 94.4 MB. Free memory was 63.2 MB in the beginning and 60.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:07,482 INFO L168 Benchmark]: RCFGBuilder took 639.89 ms. Allocated memory is still 94.4 MB. Free memory was 60.7 MB in the beginning and 39.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:07,482 INFO L168 Benchmark]: TraceAbstraction took 568409.23 ms. Allocated memory was 94.4 MB in the beginning and 717.2 MB in the end (delta: 622.9 MB). Free memory was 39.5 MB in the beginning and 318.0 MB in the end (delta: -278.6 MB). Peak memory consumption was 342.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:07,483 INFO L168 Benchmark]: Witness Printer took 64.09 ms. Allocated memory is still 717.2 MB. Free memory was 318.0 MB in the beginning and 314.4 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:07,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 493.53 ms. Allocated memory is still 94.4 MB. Free memory was 72.2 MB in the beginning and 63.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.51 ms. Allocated memory is still 94.4 MB. Free memory was 63.2 MB in the beginning and 60.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 639.89 ms. Allocated memory is still 94.4 MB. Free memory was 60.7 MB in the beginning and 39.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 568409.23 ms. Allocated memory was 94.4 MB in the beginning and 717.2 MB in the end (delta: 622.9 MB). Free memory was 39.5 MB in the beginning and 318.0 MB in the end (delta: -278.6 MB). Peak memory consumption was 342.9 MB. Max. memory is 16.1 GB. * Witness Printer took 64.09 ms. Allocated memory is still 717.2 MB. Free memory was 318.0 MB in the beginning and 314.4 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 78 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 568349.0ms, OverallIterations: 61, TraceHistogramMax: 13, EmptinessCheckTime: 74.9ms, AutomataDifference: 371940.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2559 SDtfs, 8238 SDslu, 14537 SDs, 0 SdLazy, 82810 SolverSat, 1351 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 70079.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6236 GetRequests, 3926 SyntacticMatches, 28 SemanticMatches, 2282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30850 ImplicationChecksByTransitivity, 327795.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=60, InterpolantAutomatonStates: 1209, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 303.3ms AutomataMinimizationTime, 61 MinimizatonAttempts, 261 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 795.8ms SsaConstructionTime, 34217.9ms SatisfiabilityAnalysisTime, 95076.8ms InterpolantComputationTime, 9313 NumberOfCodeBlocks, 9124 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 9212 ConstructedInterpolants, 949 QuantifiedInterpolants, 108902 SizeOfPredicates, 823 NumberOfNonLiveVariables, 18595 ConjunctsInSsa, 2773 ConjunctsInUnsatCore, 101 InterpolantComputations, 23 PerfectInterpolantSequences, 13707/28120 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 - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 20:16:07,707 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-21 20:16:07,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc7d7a6e-9f51-40ad-9d4a-d8684c0c281d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...