./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX --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 bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:18:43,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:18:43,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:18:43,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:18:43,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:18:43,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:18:43,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:18:43,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:18:43,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:18:43,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:18:43,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:18:43,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:18:43,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:18:43,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:18:43,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:18:43,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:18:43,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:18:43,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:18:43,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:18:43,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:18:43,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:18:43,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:18:43,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:18:43,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:18:43,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:18:43,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:18:43,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:18:43,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:18:43,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:18:43,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:18:43,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:18:43,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:18:43,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:18:43,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:18:43,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:18:43,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:18:43,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:18:43,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:18:43,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:18:43,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:18:43,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:18:43,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:18:43,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:18:43,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:18:43,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:18:43,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:18:43,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:18:43,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:18:43,952 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:18:43,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:18:43,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:18:43,954 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:18:43,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:18:43,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:18:43,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:18:43,955 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:18:43,956 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:18:43,956 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:18:43,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:18:43,957 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:18:43,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:18:43,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:18:43,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:18:43,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:18:43,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:18:43,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:43,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:18:43,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:18:43,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:18:43,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:18:43,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:18:43,962 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_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2021-11-09 09:18:44,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:18:44,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:18:44,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:18:44,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:18:44,331 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:18:44,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-11-09 09:18:44,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/data/50715b1b8/320fdd2142854b4ab0e20dfb8b7853b5/FLAG6b0e2288c [2021-11-09 09:18:45,100 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:18:45,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-11-09 09:18:45,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/data/50715b1b8/320fdd2142854b4ab0e20dfb8b7853b5/FLAG6b0e2288c [2021-11-09 09:18:45,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/data/50715b1b8/320fdd2142854b4ab0e20dfb8b7853b5 [2021-11-09 09:18:45,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:18:45,377 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:18:45,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:45,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:18:45,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:18:45,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:45,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733019ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45, skipping insertion in model container [2021-11-09 09:18:45,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:45,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:18:45,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:18:45,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:45,842 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:18:45,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:45,971 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:18:45,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45 WrapperNode [2021-11-09 09:18:45,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:45,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:18:45,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:18:45,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:18:45,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:45,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:46,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:46,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:46,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:46,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:46,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:46,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:18:46,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:18:46,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:18:46,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:18:46,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (1/1) ... [2021-11-09 09:18:46,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:46,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:18:46,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:18:46,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:18:46,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:18:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 09:18:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 09:18:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 09:18:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 09:18:46,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 09:18:46,175 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcat [2021-11-09 09:18:46,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:18:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 09:18:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 09:18:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 09:18:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 09:18:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 09:18:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 09:18:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 09:18:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 09:18:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 09:18:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 09:18:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 09:18:46,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 09:18:46,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 09:18:46,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 09:18:46,180 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 09:18:46,180 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 09:18:46,180 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 09:18:46,180 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 09:18:46,181 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 09:18:46,181 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 09:18:46,181 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 09:18:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 09:18:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 09:18:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 09:18:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 09:18:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 09:18:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 09:18:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 09:18:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 09:18:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 09:18:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 09:18:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 09:18:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 09:18:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 09:18:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 09:18:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 09:18:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 09:18:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 09:18:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 09:18:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 09:18:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 09:18:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 09:18:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 09:18:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 09:18:46,188 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 09:18:46,188 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 09:18:46,188 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 09:18:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 09:18:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 09:18:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 09:18:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 09:18:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 09:18:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 09:18:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 09:18:46,191 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 09:18:46,191 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 09:18:46,191 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 09:18:46,191 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 09:18:46,192 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 09:18:46,192 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 09:18:46,192 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 09:18:46,192 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 09:18:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 09:18:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 09:18:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 09:18:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 09:18:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 09:18:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 09:18:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 09:18:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 09:18:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 09:18:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 09:18:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 09:18:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 09:18:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 09:18:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 09:18:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 09:18:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 09:18:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 09:18:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 09:18:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 09:18:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 09:18:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 09:18:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 09:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 09:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 09:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 09:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 09:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 09:18:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 09:18:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 09:18:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 09:18:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 09:18:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 09:18:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 09:18:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 09:18:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 09:18:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 09:18:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 09:18:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 09:18:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 09:18:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 09:18:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 09:18:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 09:18:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 09:18:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 09:18:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 09:18:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 09:18:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-09 09:18:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcat [2021-11-09 09:18:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:18:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:18:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:18:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:18:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:18:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:18:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:18:46,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:18:46,854 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 09:18:46,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:46 BoogieIcfgContainer [2021-11-09 09:18:46,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:18:46,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:18:46,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:18:46,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:18:46,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:18:45" (1/3) ... [2021-11-09 09:18:46,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bf5cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:46, skipping insertion in model container [2021-11-09 09:18:46,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:45" (2/3) ... [2021-11-09 09:18:46,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bf5cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:46, skipping insertion in model container [2021-11-09 09:18:46,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:46" (3/3) ... [2021-11-09 09:18:46,867 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2021-11-09 09:18:46,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:18:46,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-09 09:18:46,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:18:46,942 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:18:46,942 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-09 09:18:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 30 states have (on average 1.9) internal successors, (57), 45 states have internal predecessors, (57), 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) [2021-11-09 09:18:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:18:46,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:46,972 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:46,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash 697927889, now seen corresponding path program 1 times [2021-11-09 09:18:46,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:46,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009326634] [2021-11-09 09:18:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:46,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:47,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:47,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:47,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009326634] [2021-11-09 09:18:47,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009326634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:47,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:47,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:18:47,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701557510] [2021-11-09 09:18:47,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:18:47,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:18:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:47,351 INFO L87 Difference]: Start difference. First operand has 52 states, 30 states have (on average 1.9) internal successors, (57), 45 states have internal predecessors, (57), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:47,895 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2021-11-09 09:18:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:18:47,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-09 09:18:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:47,912 INFO L225 Difference]: With dead ends: 106 [2021-11-09 09:18:47,912 INFO L226 Difference]: Without dead ends: 99 [2021-11-09 09:18:47,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:18:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-09 09:18:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2021-11-09 09:18:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 43 states have internal predecessors, (50), 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) [2021-11-09 09:18:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-09 09:18:47,983 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 11 [2021-11-09 09:18:47,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:47,984 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-09 09:18:47,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-09 09:18:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:18:47,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:47,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:47,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:18:47,987 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 160927933, now seen corresponding path program 1 times [2021-11-09 09:18:47,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:47,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815368799] [2021-11-09 09:18:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:47,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:48,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:48,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:48,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815368799] [2021-11-09 09:18:48,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815368799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:48,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:48,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:18:48,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390506771] [2021-11-09 09:18:48,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:18:48,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:18:48,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:48,172 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:48,347 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-11-09 09:18:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:18:48,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-11-09 09:18:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:48,353 INFO L225 Difference]: With dead ends: 70 [2021-11-09 09:18:48,353 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 09:18:48,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 09:18:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-11-09 09:18:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 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) [2021-11-09 09:18:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-09 09:18:48,376 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2021-11-09 09:18:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:48,377 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-09 09:18:48,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-09 09:18:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:18:48,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:48,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:48,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:18:48,379 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:48,381 INFO L85 PathProgramCache]: Analyzing trace with hash 218186235, now seen corresponding path program 1 times [2021-11-09 09:18:48,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:48,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021350079] [2021-11-09 09:18:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:48,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:48,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:48,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:48,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021350079] [2021-11-09 09:18:48,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021350079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:48,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:48,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:18:48,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519360114] [2021-11-09 09:18:48,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:18:48,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:18:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:48,578 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:48,788 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-11-09 09:18:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 12 [2021-11-09 09:18:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:48,797 INFO L225 Difference]: With dead ends: 76 [2021-11-09 09:18:48,797 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 09:18:48,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 09:18:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2021-11-09 09:18:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 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) [2021-11-09 09:18:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-09 09:18:48,819 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2021-11-09 09:18:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:48,819 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-09 09:18:48,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-09 09:18:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:18:48,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:48,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:48,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:18:48,821 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:48,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash 220033277, now seen corresponding path program 1 times [2021-11-09 09:18:48,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:48,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989697109] [2021-11-09 09:18:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:48,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:48,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:48,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:48,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989697109] [2021-11-09 09:18:48,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989697109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:48,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:48,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:18:48,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617360565] [2021-11-09 09:18:48,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:18:48,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:18:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:18:48,962 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:49,102 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-11-09 09:18:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:18:49,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 12 [2021-11-09 09:18:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:49,104 INFO L225 Difference]: With dead ends: 51 [2021-11-09 09:18:49,104 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 09:18:49,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:18:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 09:18:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-09 09:18:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 45 states have internal predecessors, (54), 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) [2021-11-09 09:18:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-09 09:18:49,124 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 12 [2021-11-09 09:18:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:49,124 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-09 09:18:49,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-09 09:18:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:18:49,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:49,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:49,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:18:49,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash 220033278, now seen corresponding path program 1 times [2021-11-09 09:18:49,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:49,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600481850] [2021-11-09 09:18:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:49,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:49,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:49,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600481850] [2021-11-09 09:18:49,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600481850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:49,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:49,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:18:49,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078978750] [2021-11-09 09:18:49,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:18:49,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:18:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:49,300 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:49,519 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-09 09:18:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:18:49,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-11-09 09:18:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:49,521 INFO L225 Difference]: With dead ends: 71 [2021-11-09 09:18:49,521 INFO L226 Difference]: Without dead ends: 71 [2021-11-09 09:18:49,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-09 09:18:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-11-09 09:18:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 47 states have internal predecessors, (57), 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) [2021-11-09 09:18:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-11-09 09:18:49,528 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 12 [2021-11-09 09:18:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:49,528 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-11-09 09:18:49,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-11-09 09:18:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:18:49,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:49,530 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:49,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:18:49,530 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:49,531 INFO L85 PathProgramCache]: Analyzing trace with hash 32870805, now seen corresponding path program 1 times [2021-11-09 09:18:49,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:49,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374229351] [2021-11-09 09:18:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:49,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:49,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:49,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374229351] [2021-11-09 09:18:49,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374229351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:49,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:49,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:18:49,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286819131] [2021-11-09 09:18:49,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:18:49,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:18:49,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:49,591 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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) [2021-11-09 09:18:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:49,708 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-11-09 09:18:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 [2021-11-09 09:18:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:49,710 INFO L225 Difference]: With dead ends: 59 [2021-11-09 09:18:49,711 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 09:18:49,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 09:18:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-11-09 09:18:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 48 states have internal predecessors, (58), 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) [2021-11-09 09:18:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-09 09:18:49,716 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2021-11-09 09:18:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:49,717 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-09 09:18:49,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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) [2021-11-09 09:18:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-09 09:18:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:18:49,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:49,718 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:49,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:18:49,719 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash 32870857, now seen corresponding path program 1 times [2021-11-09 09:18:49,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:49,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416548401] [2021-11-09 09:18:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:49,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:49,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:49,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416548401] [2021-11-09 09:18:49,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416548401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:49,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:49,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:18:49,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049345319] [2021-11-09 09:18:49,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:18:49,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:49,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:18:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:18:49,771 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-09 09:18:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:49,853 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-11-09 09:18:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:18:49,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-11-09 09:18:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:49,855 INFO L225 Difference]: With dead ends: 52 [2021-11-09 09:18:49,855 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 09:18:49,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:18:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 09:18:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-09 09:18:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 46 states have internal predecessors, (56), 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) [2021-11-09 09:18:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-11-09 09:18:49,860 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2021-11-09 09:18:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:49,861 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-11-09 09:18:49,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-09 09:18:49,861 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-11-09 09:18:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:18:49,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:49,862 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:49,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:18:49,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash 32870858, now seen corresponding path program 1 times [2021-11-09 09:18:49,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:49,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500904823] [2021-11-09 09:18:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:49,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:49,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:49,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500904823] [2021-11-09 09:18:49,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500904823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:49,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:49,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:18:49,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811779862] [2021-11-09 09:18:49,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:18:49,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:18:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:49,971 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-11-09 09:18:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:50,101 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-11-09 09:18:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:50,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 [2021-11-09 09:18:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:50,103 INFO L225 Difference]: With dead ends: 55 [2021-11-09 09:18:50,103 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 09:18:50,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 09:18:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-11-09 09:18:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 47 states have internal predecessors, (57), 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) [2021-11-09 09:18:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-11-09 09:18:50,121 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 14 [2021-11-09 09:18:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:50,122 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-11-09 09:18:50,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-11-09 09:18:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-11-09 09:18:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:18:50,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:50,123 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:50,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:18:50,123 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:50,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1859671169, now seen corresponding path program 1 times [2021-11-09 09:18:50,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:50,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498756284] [2021-11-09 09:18:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:50,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:50,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:50,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498756284] [2021-11-09 09:18:50,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498756284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:50,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122480166] [2021-11-09 09:18:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:50,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:50,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:50,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:50,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:18:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:50,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:18:50,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:50,614 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:18:50,615 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 [2021-11-09 09:18:50,624 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 [2021-11-09 09:18:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:50,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122480166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:50,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:50,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-09 09:18:50,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235454431] [2021-11-09 09:18:50,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:18:50,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:50,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:18:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:50,767 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:51,001 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-11-09 09:18:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:51,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 16 [2021-11-09 09:18:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:51,002 INFO L225 Difference]: With dead ends: 70 [2021-11-09 09:18:51,002 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 09:18:51,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 09:18:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-11-09 09:18:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 44 states have internal predecessors, (53), 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) [2021-11-09 09:18:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-09 09:18:51,006 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2021-11-09 09:18:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:51,006 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-09 09:18:51,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-09 09:18:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:18:51,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:51,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:51,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:51,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:51,209 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:51,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:51,209 INFO L85 PathProgramCache]: Analyzing trace with hash 98804632, now seen corresponding path program 1 times [2021-11-09 09:18:51,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:51,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291787846] [2021-11-09 09:18:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:51,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:51,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291787846] [2021-11-09 09:18:51,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291787846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:51,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:51,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:18:51,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339309213] [2021-11-09 09:18:51,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:18:51,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:18:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:51,297 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:51,401 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-09 09:18:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:18:51,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 18 [2021-11-09 09:18:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:51,402 INFO L225 Difference]: With dead ends: 49 [2021-11-09 09:18:51,403 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 09:18:51,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 09:18:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-09 09:18:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 43 states have internal predecessors, (52), 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) [2021-11-09 09:18:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-11-09 09:18:51,414 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 18 [2021-11-09 09:18:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:51,417 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-11-09 09:18:51,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-11-09 09:18:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:18:51,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:51,422 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:18:51,422 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash 98804685, now seen corresponding path program 1 times [2021-11-09 09:18:51,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:51,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673831598] [2021-11-09 09:18:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:51,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:51,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673831598] [2021-11-09 09:18:51,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673831598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:51,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678699033] [2021-11-09 09:18:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:51,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:51,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:51,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:18:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:18:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:51,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678699033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:51,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:18:51,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-11-09 09:18:51,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362512145] [2021-11-09 09:18:51,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:18:51,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:18:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:51,830 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:51,861 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-11-09 09:18:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:18:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-09 09:18:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:51,863 INFO L225 Difference]: With dead ends: 65 [2021-11-09 09:18:51,863 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 09:18:51,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 09:18:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-11-09 09:18:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 52 states have internal predecessors, (62), 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) [2021-11-09 09:18:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-11-09 09:18:51,868 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 18 [2021-11-09 09:18:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:51,868 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-11-09 09:18:51,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-11-09 09:18:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:18:51,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:51,874 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:51,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:52,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:18:52,094 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash 799869263, now seen corresponding path program 1 times [2021-11-09 09:18:52,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:52,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591330985] [2021-11-09 09:18:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:52,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:52,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:52,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:52,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591330985] [2021-11-09 09:18:52,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591330985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:52,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239552373] [2021-11-09 09:18:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:52,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:52,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:52,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:52,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:18:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:18:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:52,416 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:18:52,417 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 [2021-11-09 09:18:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:52,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239552373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:52,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:52,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-11-09 09:18:52,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296213171] [2021-11-09 09:18:52,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:18:52,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:18:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:52,544 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:52,677 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-11-09 09:18:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:52,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 18 [2021-11-09 09:18:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:52,679 INFO L225 Difference]: With dead ends: 59 [2021-11-09 09:18:52,679 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 09:18:52,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 09:18:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-09 09:18:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 50 states have internal predecessors, (60), 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) [2021-11-09 09:18:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-11-09 09:18:52,682 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 18 [2021-11-09 09:18:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:52,683 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-11-09 09:18:52,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-11-09 09:18:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:18:52,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:52,686 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:52,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-09 09:18:52,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:18:52,899 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:52,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1232023695, now seen corresponding path program 1 times [2021-11-09 09:18:52,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:52,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632588957] [2021-11-09 09:18:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:52,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:53,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:53,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:53,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632588957] [2021-11-09 09:18:53,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632588957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:53,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475347283] [2021-11-09 09:18:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:53,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:53,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:53,024 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:53,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:18:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:18:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:53,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475347283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:53,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:53,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-11-09 09:18:53,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147625930] [2021-11-09 09:18:53,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:18:53,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:18:53,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:18:53,359 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:53,562 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2021-11-09 09:18:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 19 [2021-11-09 09:18:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:53,564 INFO L225 Difference]: With dead ends: 86 [2021-11-09 09:18:53,564 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 09:18:53,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:18:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 09:18:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-11-09 09:18:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 73 states have internal predecessors, (85), 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) [2021-11-09 09:18:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-11-09 09:18:53,568 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 19 [2021-11-09 09:18:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:53,568 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-11-09 09:18:53,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-11-09 09:18:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:18:53,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:53,569 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:53,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:53,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:18:53,781 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash -530959117, now seen corresponding path program 1 times [2021-11-09 09:18:53,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:53,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205114973] [2021-11-09 09:18:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:53,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:53,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:53,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:53,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205114973] [2021-11-09 09:18:53,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205114973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:53,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506505312] [2021-11-09 09:18:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:53,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:53,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:53,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:53,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:18:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:18:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:54,130 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:18:54,130 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 13 treesize of output 18 [2021-11-09 09:18:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:54,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506505312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:54,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:18:54,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-09 09:18:54,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288429996] [2021-11-09 09:18:54,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:18:54,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:18:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:18:54,229 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:54,244 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2021-11-09 09:18:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:18:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-09 09:18:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:54,245 INFO L225 Difference]: With dead ends: 78 [2021-11-09 09:18:54,245 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 09:18:54,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:18:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 09:18:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2021-11-09 09:18:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.372093023255814) internal successors, (59), 49 states have internal predecessors, (59), 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) [2021-11-09 09:18:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-09 09:18:54,249 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 19 [2021-11-09 09:18:54,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:54,249 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-09 09:18:54,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-09 09:18:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:18:54,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:54,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:54,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:54,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:54,477 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrcatErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1572671214, now seen corresponding path program 1 times [2021-11-09 09:18:54,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:54,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834132851] [2021-11-09 09:18:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:54,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:54,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:54,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834132851] [2021-11-09 09:18:54,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834132851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:54,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:54,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:18:54,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63564965] [2021-11-09 09:18:54,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:18:54,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:54,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:18:54,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:54,530 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-11-09 09:18:54,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:54,646 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-09 09:18:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:54,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 22 [2021-11-09 09:18:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:54,647 INFO L225 Difference]: With dead ends: 54 [2021-11-09 09:18:54,648 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 09:18:54,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 09:18:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-09 09:18:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 48 states have internal predecessors, (58), 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) [2021-11-09 09:18:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-09 09:18:54,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 22 [2021-11-09 09:18:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:54,653 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-09 09:18:54,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-11-09 09:18:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-09 09:18:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:18:54,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:54,655 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:54,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:18:54,655 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1572671215, now seen corresponding path program 1 times [2021-11-09 09:18:54,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:54,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976447454] [2021-11-09 09:18:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:54,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:54,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:54,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976447454] [2021-11-09 09:18:54,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976447454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:54,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660711348] [2021-11-09 09:18:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:54,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:54,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:54,789 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:54,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:18:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:18:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:55,013 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:18:55,013 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 13 treesize of output 18 [2021-11-09 09:18:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:55,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660711348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:55,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:18:55,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-11-09 09:18:55,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208236367] [2021-11-09 09:18:55,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:18:55,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:55,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:18:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:18:55,134 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:55,220 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-09 09:18:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 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 22 [2021-11-09 09:18:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:55,227 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:18:55,227 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 09:18:55,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:18:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 09:18:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-11-09 09:18:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 49 states have internal predecessors, (59), 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) [2021-11-09 09:18:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-09 09:18:55,234 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 22 [2021-11-09 09:18:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:55,234 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-09 09:18:55,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-09 09:18:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:18:55,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:55,238 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:55,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:55,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:18:55,453 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash -491449560, now seen corresponding path program 1 times [2021-11-09 09:18:55,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:55,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115309221] [2021-11-09 09:18:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:55,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:55,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:55,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:55,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115309221] [2021-11-09 09:18:55,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115309221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:55,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743801136] [2021-11-09 09:18:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:55,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:55,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:55,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:55,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:18:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:55,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:18:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:55,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:18:55,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:18:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:55,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743801136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:55,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:18:55,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-09 09:18:55,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598914200] [2021-11-09 09:18:55,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:18:55,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:18:55,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:18:55,938 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:56,034 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-11-09 09:18:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:18:56,035 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), 2 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 24 [2021-11-09 09:18:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:56,036 INFO L225 Difference]: With dead ends: 92 [2021-11-09 09:18:56,036 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 09:18:56,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:18:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 09:18:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2021-11-09 09:18:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 75 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2021-11-09 09:18:56,040 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 24 [2021-11-09 09:18:56,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:56,040 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2021-11-09 09:18:56,041 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:18:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2021-11-09 09:18:56,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:18:56,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:56,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:56,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:56,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:18:56,253 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1512517914, now seen corresponding path program 1 times [2021-11-09 09:18:56,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:56,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314487165] [2021-11-09 09:18:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:56,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:56,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:56,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:56,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314487165] [2021-11-09 09:18:56,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314487165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:56,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650458239] [2021-11-09 09:18:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:56,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:56,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:56,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:56,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:18:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:18:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:56,588 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:18:56,589 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 13 treesize of output 18 [2021-11-09 09:18:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650458239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:56,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:56,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-09 09:18:56,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435452023] [2021-11-09 09:18:56,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:18:56,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:18:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:18:56,731 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 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) [2021-11-09 09:18:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:56,999 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2021-11-09 09:18:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:18:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 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 24 [2021-11-09 09:18:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:57,003 INFO L225 Difference]: With dead ends: 97 [2021-11-09 09:18:57,003 INFO L226 Difference]: Without dead ends: 97 [2021-11-09 09:18:57,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:18:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-09 09:18:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2021-11-09 09:18:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.25) internal successors, (90), 77 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-11-09 09:18:57,007 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 24 [2021-11-09 09:18:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:57,010 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-11-09 09:18:57,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 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) [2021-11-09 09:18:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-11-09 09:18:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:18:57,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:57,012 INFO L513 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] [2021-11-09 09:18:57,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:57,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:18:57,229 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrcatErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1944931375, now seen corresponding path program 1 times [2021-11-09 09:18:57,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:57,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837722809] [2021-11-09 09:18:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:57,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:57,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:57,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:57,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837722809] [2021-11-09 09:18:57,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837722809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:57,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:57,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:18:57,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432277941] [2021-11-09 09:18:57,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:18:57,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:18:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:57,284 INFO L87 Difference]: Start difference. First operand 84 states and 97 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) [2021-11-09 09:18:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:57,405 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-11-09 09:18:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:57,406 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 [2021-11-09 09:18:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:57,408 INFO L225 Difference]: With dead ends: 83 [2021-11-09 09:18:57,408 INFO L226 Difference]: Without dead ends: 83 [2021-11-09 09:18:57,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:18:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-09 09:18:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-09 09:18:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 76 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-11-09 09:18:57,413 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 25 [2021-11-09 09:18:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:57,413 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-11-09 09:18:57,414 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) [2021-11-09 09:18:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-11-09 09:18:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:18:57,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:57,415 INFO L513 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] [2021-11-09 09:18:57,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:18:57,415 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1944931376, now seen corresponding path program 1 times [2021-11-09 09:18:57,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:57,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895598706] [2021-11-09 09:18:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:57,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:57,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:57,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:57,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895598706] [2021-11-09 09:18:57,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895598706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:57,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:57,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:18:57,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109269145] [2021-11-09 09:18:57,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:18:57,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:57,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:18:57,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:57,512 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2021-11-09 09:18:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:57,698 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2021-11-09 09:18:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:18:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 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 [2021-11-09 09:18:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:57,700 INFO L225 Difference]: With dead ends: 89 [2021-11-09 09:18:57,700 INFO L226 Difference]: Without dead ends: 89 [2021-11-09 09:18:57,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:18:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-09 09:18:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-11-09 09:18:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 78 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2021-11-09 09:18:57,704 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 25 [2021-11-09 09:18:57,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:57,705 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2021-11-09 09:18:57,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2021-11-09 09:18:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2021-11-09 09:18:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:18:57,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:57,706 INFO L513 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] [2021-11-09 09:18:57,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:18:57,706 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcatErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:57,706 INFO L85 PathProgramCache]: Analyzing trace with hash 163330554, now seen corresponding path program 1 times [2021-11-09 09:18:57,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:57,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160254693] [2021-11-09 09:18:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:57,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:57,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:57,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:57,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160254693] [2021-11-09 09:18:57,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160254693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:57,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:57,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:18:57,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356823906] [2021-11-09 09:18:57,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:18:57,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:57,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:18:57,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:57,768 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-11-09 09:18:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:57,898 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-11-09 09:18:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:57,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 26 [2021-11-09 09:18:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:57,899 INFO L225 Difference]: With dead ends: 84 [2021-11-09 09:18:57,899 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 09:18:57,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:18:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 09:18:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-09 09:18:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 77 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-11-09 09:18:57,920 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 26 [2021-11-09 09:18:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:57,920 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-11-09 09:18:57,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-11-09 09:18:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-11-09 09:18:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:18:57,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:57,921 INFO L513 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] [2021-11-09 09:18:57,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:18:57,922 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash 163330555, now seen corresponding path program 1 times [2021-11-09 09:18:57,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:57,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438053139] [2021-11-09 09:18:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:57,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:58,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:58,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438053139] [2021-11-09 09:18:58,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438053139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:58,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:58,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:18:58,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723768491] [2021-11-09 09:18:58,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:18:58,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:18:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:58,087 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-11-09 09:18:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:58,257 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2021-11-09 09:18:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:18:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 26 [2021-11-09 09:18:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:58,261 INFO L225 Difference]: With dead ends: 88 [2021-11-09 09:18:58,261 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 09:18:58,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:18:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 09:18:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-09 09:18:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 80 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-11-09 09:18:58,273 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 26 [2021-11-09 09:18:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:58,273 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-11-09 09:18:58,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-11-09 09:18:58,274 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-11-09 09:18:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:18:58,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:58,275 INFO L513 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] [2021-11-09 09:18:58,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:18:58,275 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1830768289, now seen corresponding path program 2 times [2021-11-09 09:18:58,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:58,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401503272] [2021-11-09 09:18:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:58,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:18:58,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:58,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401503272] [2021-11-09 09:18:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401503272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:58,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:58,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-09 09:18:58,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245643802] [2021-11-09 09:18:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:18:58,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:18:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:18:58,451 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-11-09 09:18:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:58,739 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2021-11-09 09:18:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:18:58,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 26 [2021-11-09 09:18:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:58,741 INFO L225 Difference]: With dead ends: 105 [2021-11-09 09:18:58,741 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 09:18:58,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:18:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 09:18:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2021-11-09 09:18:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 72 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-11-09 09:18:58,746 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 26 [2021-11-09 09:18:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:58,746 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-11-09 09:18:58,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-11-09 09:18:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-11-09 09:18:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:18:58,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:58,747 INFO L513 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] [2021-11-09 09:18:58,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 09:18:58,747 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:18:58,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:58,747 INFO L85 PathProgramCache]: Analyzing trace with hash 775255265, now seen corresponding path program 1 times [2021-11-09 09:18:58,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:58,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984362255] [2021-11-09 09:18:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:58,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:18:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:58,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:58,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984362255] [2021-11-09 09:18:58,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984362255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:58,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386345308] [2021-11-09 09:18:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:58,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:58,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:59,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:18:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:59,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:18:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:59,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:18:59,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:18:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:59,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386345308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:59,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:59,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-11-09 09:18:59,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438556375] [2021-11-09 09:18:59,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:18:59,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:18:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:18:59,494 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:00,095 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2021-11-09 09:19:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:19:00,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 3 states have call successors, (5), 3 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 26 [2021-11-09 09:19:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:00,097 INFO L225 Difference]: With dead ends: 119 [2021-11-09 09:19:00,097 INFO L226 Difference]: Without dead ends: 119 [2021-11-09 09:19:00,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:19:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-09 09:19:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2021-11-09 09:19:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:19:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2021-11-09 09:19:00,101 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 26 [2021-11-09 09:19:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:00,101 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2021-11-09 09:19:00,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2021-11-09 09:19:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:19:00,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:00,102 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:00,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:00,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:19:00,313 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -417333064, now seen corresponding path program 1 times [2021-11-09 09:19:00,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:00,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668780015] [2021-11-09 09:19:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:00,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:00,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:00,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668780015] [2021-11-09 09:19:00,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668780015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:00,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:00,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 09:19:00,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692130583] [2021-11-09 09:19:00,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:19:00,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:19:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:19:00,452 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-11-09 09:19:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:00,701 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2021-11-09 09:19:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:19:00,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 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 29 [2021-11-09 09:19:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:00,702 INFO L225 Difference]: With dead ends: 138 [2021-11-09 09:19:00,703 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 09:19:00,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:19:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 09:19:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2021-11-09 09:19:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 120 states have (on average 1.2083333333333333) internal successors, (145), 124 states have internal predecessors, (145), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:19:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2021-11-09 09:19:00,709 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 29 [2021-11-09 09:19:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:00,709 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2021-11-09 09:19:00,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-11-09 09:19:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2021-11-09 09:19:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:19:00,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:00,711 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:00,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 09:19:00,711 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2072195898, now seen corresponding path program 1 times [2021-11-09 09:19:00,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:00,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014842445] [2021-11-09 09:19:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:00,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:00,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:00,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014842445] [2021-11-09 09:19:00,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014842445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:00,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:00,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 09:19:00,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411931240] [2021-11-09 09:19:00,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:19:00,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:19:00,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:19:00,871 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-11-09 09:19:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:01,213 INFO L93 Difference]: Finished difference Result 162 states and 184 transitions. [2021-11-09 09:19:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:19:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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 29 [2021-11-09 09:19:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:01,215 INFO L225 Difference]: With dead ends: 162 [2021-11-09 09:19:01,216 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 09:19:01,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:19:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 09:19:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 137. [2021-11-09 09:19:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 127 states have internal predecessors, (146), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 09:19:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2021-11-09 09:19:01,222 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 29 [2021-11-09 09:19:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:01,222 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2021-11-09 09:19:01,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-11-09 09:19:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2021-11-09 09:19:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:19:01,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:01,224 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:01,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 09:19:01,224 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:01,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2003916680, now seen corresponding path program 1 times [2021-11-09 09:19:01,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:01,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372856294] [2021-11-09 09:19:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:01,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:01,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:01,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:01,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372856294] [2021-11-09 09:19:01,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372856294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:01,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:01,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-09 09:19:01,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328762888] [2021-11-09 09:19:01,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:19:01,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:01,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:19:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:19:01,398 INFO L87 Difference]: Start difference. First operand 137 states and 159 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-11-09 09:19:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:01,667 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2021-11-09 09:19:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:19:01,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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 29 [2021-11-09 09:19:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:01,670 INFO L225 Difference]: With dead ends: 191 [2021-11-09 09:19:01,670 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 09:19:01,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:19:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 09:19:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2021-11-09 09:19:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 129 states have internal predecessors, (150), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 09:19:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2021-11-09 09:19:01,676 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 29 [2021-11-09 09:19:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:01,677 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2021-11-09 09:19:01,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-11-09 09:19:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2021-11-09 09:19:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 09:19:01,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:01,678 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:01,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-09 09:19:01,678 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1008188004, now seen corresponding path program 2 times [2021-11-09 09:19:01,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:01,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143253492] [2021-11-09 09:19:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:01,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:01,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:01,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:01,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143253492] [2021-11-09 09:19:01,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143253492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:01,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565334327] [2021-11-09 09:19:01,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:01,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:01,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:01,845 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:01,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:19:02,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:02,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:02,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:19:02,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:02,149 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:02,150 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 [2021-11-09 09:19:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:02,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565334327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:02,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:02,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-11-09 09:19:02,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439472906] [2021-11-09 09:19:02,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:19:02,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:02,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:19:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:19:02,460 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 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) [2021-11-09 09:19:03,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:03,000 INFO L93 Difference]: Finished difference Result 216 states and 251 transitions. [2021-11-09 09:19:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:19:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 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 30 [2021-11-09 09:19:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:03,014 INFO L225 Difference]: With dead ends: 216 [2021-11-09 09:19:03,014 INFO L226 Difference]: Without dead ends: 216 [2021-11-09 09:19:03,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:19:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-09 09:19:03,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 171. [2021-11-09 09:19:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 153 states have (on average 1.2156862745098038) internal successors, (186), 160 states have internal predecessors, (186), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (8), 2 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-09 09:19:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2021-11-09 09:19:03,031 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 30 [2021-11-09 09:19:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:03,032 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2021-11-09 09:19:03,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 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) [2021-11-09 09:19:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2021-11-09 09:19:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:19:03,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:03,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:03,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:03,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:19:03,241 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:03,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1118111750, now seen corresponding path program 1 times [2021-11-09 09:19:03,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:03,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628957511] [2021-11-09 09:19:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:03,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:03,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:03,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 09:19:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:03,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:03,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628957511] [2021-11-09 09:19:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628957511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:03,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:03,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:19:03,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358644127] [2021-11-09 09:19:03,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:19:03,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:19:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:19:03,315 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-09 09:19:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:03,503 INFO L93 Difference]: Finished difference Result 174 states and 205 transitions. [2021-11-09 09:19:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:19:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 32 [2021-11-09 09:19:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:03,505 INFO L225 Difference]: With dead ends: 174 [2021-11-09 09:19:03,505 INFO L226 Difference]: Without dead ends: 115 [2021-11-09 09:19:03,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:19:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-09 09:19:03,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2021-11-09 09:19:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2021-11-09 09:19:03,513 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 32 [2021-11-09 09:19:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:03,513 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2021-11-09 09:19:03,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-09 09:19:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2021-11-09 09:19:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:19:03,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:03,514 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:19:03,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-09 09:19:03,515 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1793981897, now seen corresponding path program 1 times [2021-11-09 09:19:03,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:03,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658425714] [2021-11-09 09:19:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:03,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:03,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:03,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:03,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658425714] [2021-11-09 09:19:03,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658425714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:03,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677024014] [2021-11-09 09:19:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:03,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:03,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:03,693 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:03,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:19:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:03,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:19:03,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:04,020 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:04,020 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 [2021-11-09 09:19:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:04,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677024014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:04,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:04,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-11-09 09:19:04,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358739010] [2021-11-09 09:19:04,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:19:04,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:04,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:19:04,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:19:04,364 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 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) [2021-11-09 09:19:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:04,715 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2021-11-09 09:19:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:19:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 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 32 [2021-11-09 09:19:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:04,716 INFO L225 Difference]: With dead ends: 124 [2021-11-09 09:19:04,717 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 09:19:04,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:19:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 09:19:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2021-11-09 09:19:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 100 states have (on average 1.19) internal successors, (119), 102 states have internal predecessors, (119), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-11-09 09:19:04,721 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 32 [2021-11-09 09:19:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:04,721 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-11-09 09:19:04,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 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) [2021-11-09 09:19:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-11-09 09:19:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:19:04,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:04,723 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:04,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:04,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:04,933 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1793936035, now seen corresponding path program 3 times [2021-11-09 09:19:04,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:04,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121015023] [2021-11-09 09:19:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:04,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:05,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:05,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:05,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121015023] [2021-11-09 09:19:05,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121015023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:05,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606774371] [2021-11-09 09:19:05,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:05,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:05,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:05,337 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:05,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:19:05,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:19:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:19:05,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:05,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 09:19:06,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:19:06,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2021-11-09 09:19:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:06,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606774371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:06,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:06,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-11-09 09:19:06,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402577342] [2021-11-09 09:19:06,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:19:06,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:19:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:19:06,054 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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) [2021-11-09 09:19:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:06,860 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2021-11-09 09:19:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:19:06,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 32 [2021-11-09 09:19:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:06,861 INFO L225 Difference]: With dead ends: 160 [2021-11-09 09:19:06,862 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 09:19:06,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:19:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 09:19:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2021-11-09 09:19:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 115 states have internal predecessors, (134), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2021-11-09 09:19:06,867 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 32 [2021-11-09 09:19:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:06,867 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2021-11-09 09:19:06,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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) [2021-11-09 09:19:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2021-11-09 09:19:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:19:06,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:06,868 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:06,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:07,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:07,069 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2076386475, now seen corresponding path program 1 times [2021-11-09 09:19:07,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:07,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92889997] [2021-11-09 09:19:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:07,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:07,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:07,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:07,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92889997] [2021-11-09 09:19:07,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92889997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:07,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470187224] [2021-11-09 09:19:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:07,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:07,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:07,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:19:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:07,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:19:07,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:07,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470187224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:07,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:07,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-11-09 09:19:07,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888854795] [2021-11-09 09:19:07,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:19:07,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:07,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:19:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:19:07,573 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 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) [2021-11-09 09:19:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:07,784 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2021-11-09 09:19:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:19:07,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 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 33 [2021-11-09 09:19:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:07,785 INFO L225 Difference]: With dead ends: 129 [2021-11-09 09:19:07,786 INFO L226 Difference]: Without dead ends: 129 [2021-11-09 09:19:07,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:19:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-09 09:19:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2021-11-09 09:19:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2021-11-09 09:19:07,798 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 33 [2021-11-09 09:19:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:07,798 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2021-11-09 09:19:07,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 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) [2021-11-09 09:19:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2021-11-09 09:19:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:19:07,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:07,799 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:07,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:08,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:08,025 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:08,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1362988192, now seen corresponding path program 4 times [2021-11-09 09:19:08,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:08,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951794987] [2021-11-09 09:19:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:08,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:08,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:08,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:08,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951794987] [2021-11-09 09:19:08,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951794987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:08,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758305039] [2021-11-09 09:19:08,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:19:08,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:08,237 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:08,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:19:08,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:19:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:19:08,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:08,663 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:08,663 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 23 [2021-11-09 09:19:08,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 09:19:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:09,295 INFO L354 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2021-11-09 09:19:09,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2021-11-09 09:19:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 09:19:09,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758305039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:09,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:09,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-11-09 09:19:09,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411811251] [2021-11-09 09:19:09,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:19:09,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:19:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:19:09,530 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-11-09 09:19:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:11,226 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2021-11-09 09:19:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:19:11,228 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 36 [2021-11-09 09:19:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:11,229 INFO L225 Difference]: With dead ends: 173 [2021-11-09 09:19:11,229 INFO L226 Difference]: Without dead ends: 173 [2021-11-09 09:19:11,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=277, Invalid=2173, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:19:11,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-09 09:19:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 124. [2021-11-09 09:19:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 116 states have internal predecessors, (135), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2021-11-09 09:19:11,236 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 36 [2021-11-09 09:19:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:11,236 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2021-11-09 09:19:11,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-11-09 09:19:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2021-11-09 09:19:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:19:11,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:11,238 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:19:11,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:11,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 09:19:11,457 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1736805490, now seen corresponding path program 2 times [2021-11-09 09:19:11,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:11,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36752044] [2021-11-09 09:19:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:11,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:11,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:19:11,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:11,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36752044] [2021-11-09 09:19:11,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36752044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:11,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303814019] [2021-11-09 09:19:11,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:11,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:11,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:11,605 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:11,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:19:11,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:11,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:19:11,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:19:12,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303814019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:12,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:12,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-11-09 09:19:12,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596847838] [2021-11-09 09:19:12,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:19:12,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:12,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:19:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:19:12,138 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 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) [2021-11-09 09:19:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:12,478 INFO L93 Difference]: Finished difference Result 141 states and 156 transitions. [2021-11-09 09:19:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:19:12,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 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 [2021-11-09 09:19:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:12,479 INFO L225 Difference]: With dead ends: 141 [2021-11-09 09:19:12,479 INFO L226 Difference]: Without dead ends: 141 [2021-11-09 09:19:12,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:19:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-09 09:19:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-11-09 09:19:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 121 states have internal predecessors, (140), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2021-11-09 09:19:12,484 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 37 [2021-11-09 09:19:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:12,484 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2021-11-09 09:19:12,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 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) [2021-11-09 09:19:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2021-11-09 09:19:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:19:12,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:12,485 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:12,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:12,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:19:12,689 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -133417613, now seen corresponding path program 2 times [2021-11-09 09:19:12,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:12,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443262446] [2021-11-09 09:19:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:12,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:12,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:12,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443262446] [2021-11-09 09:19:12,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443262446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:12,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063054456] [2021-11-09 09:19:12,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:12,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:12,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:12,902 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:12,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:19:13,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 09:19:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:19:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-09 09:19:13,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063054456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:13,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:19:13,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2021-11-09 09:19:13,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738124565] [2021-11-09 09:19:13,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:19:13,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:19:13,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:19:13,364 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-11-09 09:19:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:13,389 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2021-11-09 09:19:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:19:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 38 [2021-11-09 09:19:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:13,390 INFO L225 Difference]: With dead ends: 129 [2021-11-09 09:19:13,390 INFO L226 Difference]: Without dead ends: 126 [2021-11-09 09:19:13,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:19:13,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-09 09:19:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-11-09 09:19:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 115 states have internal predecessors, (131), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2021-11-09 09:19:13,395 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 38 [2021-11-09 09:19:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:13,395 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2021-11-09 09:19:13,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-11-09 09:19:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2021-11-09 09:19:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:19:13,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:13,396 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:13,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:13,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:13,619 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:13,619 INFO L85 PathProgramCache]: Analyzing trace with hash -133371751, now seen corresponding path program 5 times [2021-11-09 09:19:13,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:13,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432039011] [2021-11-09 09:19:13,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:13,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:14,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:14,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:14,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432039011] [2021-11-09 09:19:14,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432039011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:14,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662369808] [2021-11-09 09:19:14,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:19:14,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:14,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:14,225 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:14,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:19:14,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:19:14,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:19:14,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:14,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:19:15,424 INFO L354 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-11-09 09:19:15,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 32 [2021-11-09 09:19:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:15,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662369808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:15,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:15,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2021-11-09 09:19:15,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093905222] [2021-11-09 09:19:15,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:19:15,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:19:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:19:15,440 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 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) [2021-11-09 09:19:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:17,338 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2021-11-09 09:19:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:19:17,339 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 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 38 [2021-11-09 09:19:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:17,340 INFO L225 Difference]: With dead ends: 181 [2021-11-09 09:19:17,340 INFO L226 Difference]: Without dead ends: 171 [2021-11-09 09:19:17,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:19:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-09 09:19:17,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2021-11-09 09:19:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 128 states have (on average 1.1640625) internal successors, (149), 130 states have internal predecessors, (149), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2021-11-09 09:19:17,346 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 38 [2021-11-09 09:19:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:17,346 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2021-11-09 09:19:17,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 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) [2021-11-09 09:19:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2021-11-09 09:19:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:19:17,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:17,348 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:19:17,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:17,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:17,553 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash -667913360, now seen corresponding path program 1 times [2021-11-09 09:19:17,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:17,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736939938] [2021-11-09 09:19:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:17,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:17,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:19:17,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:17,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736939938] [2021-11-09 09:19:17,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736939938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:17,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186809097] [2021-11-09 09:19:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:17,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:17,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:17,777 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:17,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:19:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:19:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:18,239 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:18,239 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 15 treesize of output 20 [2021-11-09 09:19:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:19:18,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186809097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:18,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:18,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-11-09 09:19:18,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47284980] [2021-11-09 09:19:18,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:19:18,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:19:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:19:18,582 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 17 states have internal predecessors, (59), 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) [2021-11-09 09:19:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:19,048 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2021-11-09 09:19:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:19:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 17 states have internal predecessors, (59), 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 40 [2021-11-09 09:19:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:19,049 INFO L225 Difference]: With dead ends: 164 [2021-11-09 09:19:19,049 INFO L226 Difference]: Without dead ends: 164 [2021-11-09 09:19:19,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:19:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-09 09:19:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2021-11-09 09:19:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 140 states have (on average 1.1571428571428573) internal successors, (162), 142 states have internal predecessors, (162), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 170 transitions. [2021-11-09 09:19:19,054 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 170 transitions. Word has length 40 [2021-11-09 09:19:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:19,054 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 170 transitions. [2021-11-09 09:19:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 17 states have internal predecessors, (59), 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) [2021-11-09 09:19:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 170 transitions. [2021-11-09 09:19:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:19:19,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:19,055 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-09 09:19:19,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:19,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:19,255 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:19,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash -667267078, now seen corresponding path program 3 times [2021-11-09 09:19:19,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:19,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102465743] [2021-11-09 09:19:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:19,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:19:19,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:19,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102465743] [2021-11-09 09:19:19,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102465743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:19,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545184321] [2021-11-09 09:19:19,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:19,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:19,562 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:19,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:19:19,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:19:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 09:19:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:20,006 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 [2021-11-09 09:19:20,460 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 [2021-11-09 09:19:20,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 09:19:21,119 INFO L354 Elim1Store]: treesize reduction 64, result has 30.4 percent of original size [2021-11-09 09:19:21,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 56 [2021-11-09 09:19:21,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-09 09:19:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:21,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545184321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:21,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:21,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-11-09 09:19:21,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658922247] [2021-11-09 09:19:21,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:19:21,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:21,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:19:21,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:19:21,212 INFO L87 Difference]: Start difference. First operand 151 states and 170 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 24 states have internal predecessors, (59), 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) [2021-11-09 09:19:22,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:22,147 INFO L93 Difference]: Finished difference Result 264 states and 295 transitions. [2021-11-09 09:19:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:19:22,148 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 24 states have internal predecessors, (59), 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 [2021-11-09 09:19:22,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:22,149 INFO L225 Difference]: With dead ends: 264 [2021-11-09 09:19:22,149 INFO L226 Difference]: Without dead ends: 214 [2021-11-09 09:19:22,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=246, Invalid=1824, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:19:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-09 09:19:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 203. [2021-11-09 09:19:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 191 states have (on average 1.1361256544502618) internal successors, (217), 193 states have internal predecessors, (217), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 226 transitions. [2021-11-09 09:19:22,156 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 226 transitions. Word has length 41 [2021-11-09 09:19:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:22,156 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 226 transitions. [2021-11-09 09:19:22,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 24 states have internal predecessors, (59), 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) [2021-11-09 09:19:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 226 transitions. [2021-11-09 09:19:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:19:22,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:22,158 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:22,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:22,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:19:22,385 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1598291556, now seen corresponding path program 6 times [2021-11-09 09:19:22,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:22,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013521600] [2021-11-09 09:19:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:22,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:22,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:22,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:22,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013521600] [2021-11-09 09:19:22,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013521600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:22,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682461332] [2021-11-09 09:19:22,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:19:22,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:22,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:22,605 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:22,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:19:23,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:19:23,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 09:19:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:23,241 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:23,241 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 [2021-11-09 09:19:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682461332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:23,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:23,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-11-09 09:19:23,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718856620] [2021-11-09 09:19:23,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:19:23,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:19:23,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:19:23,682 INFO L87 Difference]: Start difference. First operand 203 states and 226 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 26 states have internal predecessors, (71), 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) [2021-11-09 09:19:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:24,244 INFO L93 Difference]: Finished difference Result 292 states and 320 transitions. [2021-11-09 09:19:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:19:24,245 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 26 states have internal predecessors, (71), 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 42 [2021-11-09 09:19:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:24,247 INFO L225 Difference]: With dead ends: 292 [2021-11-09 09:19:24,247 INFO L226 Difference]: Without dead ends: 292 [2021-11-09 09:19:24,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:19:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-09 09:19:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 209. [2021-11-09 09:19:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 197 states have (on average 1.1421319796954315) internal successors, (225), 199 states have internal predecessors, (225), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2021-11-09 09:19:24,256 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 42 [2021-11-09 09:19:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:24,256 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2021-11-09 09:19:24,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 26 states have internal predecessors, (71), 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) [2021-11-09 09:19:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2021-11-09 09:19:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:19:24,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:24,258 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:24,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:19:24,476 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1640107669, now seen corresponding path program 7 times [2021-11-09 09:19:24,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:24,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554144229] [2021-11-09 09:19:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:24,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:25,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:25,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:25,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554144229] [2021-11-09 09:19:25,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554144229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:25,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886682942] [2021-11-09 09:19:25,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:19:25,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:25,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:25,182 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:25,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:19:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:19:25,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:26,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:19:27,014 INFO L354 Elim1Store]: treesize reduction 93, result has 20.5 percent of original size [2021-11-09 09:19:27,014 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 65 treesize of output 59 [2021-11-09 09:19:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:27,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886682942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:27,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:27,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-11-09 09:19:27,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600347581] [2021-11-09 09:19:27,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:19:27,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:19:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:19:27,035 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand has 38 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 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) [2021-11-09 09:19:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:28,671 INFO L93 Difference]: Finished difference Result 300 states and 333 transitions. [2021-11-09 09:19:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:19:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 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 44 [2021-11-09 09:19:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:28,673 INFO L225 Difference]: With dead ends: 300 [2021-11-09 09:19:28,673 INFO L226 Difference]: Without dead ends: 288 [2021-11-09 09:19:28,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=401, Invalid=3505, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 09:19:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-09 09:19:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 241. [2021-11-09 09:19:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 227 states have (on average 1.1497797356828194) internal successors, (261), 229 states have internal predecessors, (261), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2021-11-09 09:19:28,682 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 44 [2021-11-09 09:19:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:28,683 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2021-11-09 09:19:28,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 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) [2021-11-09 09:19:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2021-11-09 09:19:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:19:28,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:28,684 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-09 09:19:28,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-09 09:19:28,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:19:28,913 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1898173420, now seen corresponding path program 2 times [2021-11-09 09:19:28,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:28,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037323206] [2021-11-09 09:19:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:28,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:29,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:29,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:29,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037323206] [2021-11-09 09:19:29,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037323206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:29,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79980054] [2021-11-09 09:19:29,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:29,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:29,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:29,117 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:29,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:19:29,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:29,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:19:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:29,720 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:29,721 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 [2021-11-09 09:19:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:30,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79980054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:30,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:30,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-11-09 09:19:30,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199225925] [2021-11-09 09:19:30,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:19:30,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:19:30,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:19:30,150 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 26 states, 25 states have (on average 3.16) internal successors, (79), 23 states have internal predecessors, (79), 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) [2021-11-09 09:19:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:30,644 INFO L93 Difference]: Finished difference Result 273 states and 302 transitions. [2021-11-09 09:19:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:19:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 23 states have internal predecessors, (79), 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 46 [2021-11-09 09:19:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:30,646 INFO L225 Difference]: With dead ends: 273 [2021-11-09 09:19:30,646 INFO L226 Difference]: Without dead ends: 256 [2021-11-09 09:19:30,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:19:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-09 09:19:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 245. [2021-11-09 09:19:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 232 states have (on average 1.1379310344827587) internal successors, (264), 234 states have internal predecessors, (264), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2021-11-09 09:19:30,652 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 46 [2021-11-09 09:19:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:30,653 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2021-11-09 09:19:30,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 23 states have internal predecessors, (79), 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) [2021-11-09 09:19:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2021-11-09 09:19:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 09:19:30,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:30,654 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:30,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-09 09:19:30,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:30,871 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1515382440, now seen corresponding path program 8 times [2021-11-09 09:19:30,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:30,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477104225] [2021-11-09 09:19:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:30,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:31,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:31,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477104225] [2021-11-09 09:19:31,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477104225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:31,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348815036] [2021-11-09 09:19:31,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:31,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:31,141 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:31,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:19:31,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:31,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:31,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:19:31,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:31,703 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:31,703 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 [2021-11-09 09:19:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:32,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348815036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:32,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:32,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-11-09 09:19:32,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344306594] [2021-11-09 09:19:32,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:19:32,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:19:32,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:19:32,263 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 29 states have internal predecessors, (83), 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) [2021-11-09 09:19:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:33,026 INFO L93 Difference]: Finished difference Result 352 states and 387 transitions. [2021-11-09 09:19:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:19:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 29 states have internal predecessors, (83), 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 48 [2021-11-09 09:19:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:33,029 INFO L225 Difference]: With dead ends: 352 [2021-11-09 09:19:33,029 INFO L226 Difference]: Without dead ends: 352 [2021-11-09 09:19:33,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:19:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-09 09:19:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 251. [2021-11-09 09:19:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 238 states have (on average 1.1428571428571428) internal successors, (272), 240 states have internal predecessors, (272), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 282 transitions. [2021-11-09 09:19:33,039 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 282 transitions. Word has length 48 [2021-11-09 09:19:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:33,039 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 282 transitions. [2021-11-09 09:19:33,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 29 states have internal predecessors, (83), 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) [2021-11-09 09:19:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 282 transitions. [2021-11-09 09:19:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:19:33,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:33,041 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-09 09:19:33,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 09:19:33,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:33,261 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1078891276, now seen corresponding path program 4 times [2021-11-09 09:19:33,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:33,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818340259] [2021-11-09 09:19:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:33,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:33,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 09:19:33,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:33,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818340259] [2021-11-09 09:19:33,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818340259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:33,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091031687] [2021-11-09 09:19:33,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:19:33,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:33,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:33,473 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:33,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:19:34,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:19:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:34,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 09:19:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:34,231 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:34,231 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 [2021-11-09 09:19:34,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-09 09:19:35,002 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-09 09:19:35,003 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 44 treesize of output 43 [2021-11-09 09:19:35,651 INFO L354 Elim1Store]: treesize reduction 54, result has 41.3 percent of original size [2021-11-09 09:19:35,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 70 [2021-11-09 09:19:35,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:19:35,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-09 09:19:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:36,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091031687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:36,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:36,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 30 [2021-11-09 09:19:36,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370720490] [2021-11-09 09:19:36,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:19:36,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:19:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:19:36,111 INFO L87 Difference]: Start difference. First operand 251 states and 282 transitions. Second operand has 31 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 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) [2021-11-09 09:19:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:47,226 INFO L93 Difference]: Finished difference Result 270 states and 298 transitions. [2021-11-09 09:19:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:19:47,226 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 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 49 [2021-11-09 09:19:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:47,228 INFO L225 Difference]: With dead ends: 270 [2021-11-09 09:19:47,228 INFO L226 Difference]: Without dead ends: 270 [2021-11-09 09:19:47,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=265, Invalid=2185, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:19:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-09 09:19:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 260. [2021-11-09 09:19:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 247 states have (on average 1.1376518218623481) internal successors, (281), 249 states have internal predecessors, (281), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2021-11-09 09:19:47,237 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 49 [2021-11-09 09:19:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:47,237 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2021-11-09 09:19:47,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 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) [2021-11-09 09:19:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2021-11-09 09:19:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:19:47,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:47,239 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:47,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:47,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 09:19:47,453 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -288610479, now seen corresponding path program 9 times [2021-11-09 09:19:47,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:47,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904080780] [2021-11-09 09:19:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:47,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:48,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:48,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:48,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904080780] [2021-11-09 09:19:48,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904080780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:48,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968633265] [2021-11-09 09:19:48,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:48,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:48,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:48,522 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:48,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:19:49,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 09:19:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 09:19:49,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:50,141 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 33 treesize of output 29 [2021-11-09 09:19:50,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:19:50,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 23 [2021-11-09 09:19:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:50,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968633265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:50,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:50,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 43 [2021-11-09 09:19:50,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759961084] [2021-11-09 09:19:50,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 09:19:50,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 09:19:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:19:50,867 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 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) [2021-11-09 09:19:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:53,446 INFO L93 Difference]: Finished difference Result 390 states and 433 transitions. [2021-11-09 09:19:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 09:19:53,446 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 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 50 [2021-11-09 09:19:53,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:53,448 INFO L225 Difference]: With dead ends: 390 [2021-11-09 09:19:53,449 INFO L226 Difference]: Without dead ends: 373 [2021-11-09 09:19:53,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=599, Invalid=5563, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 09:19:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-09 09:19:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 296. [2021-11-09 09:19:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 281 states have (on average 1.1459074733096086) internal successors, (322), 283 states have internal predecessors, (322), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 334 transitions. [2021-11-09 09:19:53,458 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 334 transitions. Word has length 50 [2021-11-09 09:19:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:53,459 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 334 transitions. [2021-11-09 09:19:53,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 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) [2021-11-09 09:19:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 334 transitions. [2021-11-09 09:19:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 09:19:53,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:53,460 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2021-11-09 09:19:53,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:53,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:53,681 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:19:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:53,681 INFO L85 PathProgramCache]: Analyzing trace with hash -195209432, now seen corresponding path program 3 times [2021-11-09 09:19:53,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:53,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555304808] [2021-11-09 09:19:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:53,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:53,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:19:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:53,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:53,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555304808] [2021-11-09 09:19:53,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555304808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:53,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027007530] [2021-11-09 09:19:53,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:53,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:53,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:53,973 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:53,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:19:54,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:19:54,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:54,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:19:54,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:54,833 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:19:54,833 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 15 treesize of output 20 [2021-11-09 09:19:55,112 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 25 treesize of output 21 [2021-11-09 09:19:57,558 INFO L354 Elim1Store]: treesize reduction 2, result has 93.5 percent of original size [2021-11-09 09:19:57,558 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 47 treesize of output 60 [2021-11-09 09:19:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:19:58,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027007530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:58,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:58,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-11-09 09:19:58,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469047074] [2021-11-09 09:19:58,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:19:58,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:58,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:19:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:19:58,080 INFO L87 Difference]: Start difference. First operand 296 states and 334 transitions. Second operand has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 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) [2021-11-09 09:20:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:09,884 INFO L93 Difference]: Finished difference Result 388 states and 425 transitions. [2021-11-09 09:20:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:20:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 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 52 [2021-11-09 09:20:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:09,886 INFO L225 Difference]: With dead ends: 388 [2021-11-09 09:20:09,886 INFO L226 Difference]: Without dead ends: 369 [2021-11-09 09:20:09,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=661, Invalid=5816, Unknown=3, NotChecked=0, Total=6480 [2021-11-09 09:20:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-09 09:20:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 312. [2021-11-09 09:20:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 297 states have (on average 1.1346801346801347) internal successors, (337), 299 states have internal predecessors, (337), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:20:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 349 transitions. [2021-11-09 09:20:09,897 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 349 transitions. Word has length 52 [2021-11-09 09:20:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:09,898 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 349 transitions. [2021-11-09 09:20:09,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 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) [2021-11-09 09:20:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 349 transitions. [2021-11-09 09:20:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:20:09,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:09,899 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:09,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:10,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:10,100 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:20:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:10,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2124291964, now seen corresponding path program 5 times [2021-11-09 09:20:10,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:10,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962895465] [2021-11-09 09:20:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:10,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:10,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:20:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:10,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:10,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962895465] [2021-11-09 09:20:10,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962895465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:10,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778074747] [2021-11-09 09:20:10,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:20:10,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:10,743 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:10,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:20:11,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:20:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 09:20:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:11,593 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 [2021-11-09 09:20:12,180 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 [2021-11-09 09:20:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 09:20:12,811 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-09 09:20:12,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 53 [2021-11-09 09:20:12,923 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:20:12,923 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 23 treesize of output 22 [2021-11-09 09:20:12,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:20:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:12,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778074747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:12,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:12,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-11-09 09:20:12,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052460070] [2021-11-09 09:20:12,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:20:12,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:20:12,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:20:12,952 INFO L87 Difference]: Start difference. First operand 312 states and 349 transitions. Second operand has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 34 states have internal predecessors, (85), 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) [2021-11-09 09:20:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:14,868 INFO L93 Difference]: Finished difference Result 339 states and 374 transitions. [2021-11-09 09:20:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:20:14,869 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 34 states have internal predecessors, (85), 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 [2021-11-09 09:20:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:14,870 INFO L225 Difference]: With dead ends: 339 [2021-11-09 09:20:14,870 INFO L226 Difference]: Without dead ends: 299 [2021-11-09 09:20:14,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=349, Invalid=3191, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:20:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-09 09:20:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2021-11-09 09:20:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 283 states have (on average 1.127208480565371) internal successors, (319), 285 states have internal predecessors, (319), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:20:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 329 transitions. [2021-11-09 09:20:14,879 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 329 transitions. Word has length 53 [2021-11-09 09:20:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:14,879 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 329 transitions. [2021-11-09 09:20:14,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 34 states have internal predecessors, (85), 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) [2021-11-09 09:20:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 329 transitions. [2021-11-09 09:20:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 09:20:14,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:14,881 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:14,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:15,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:15,104 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:20:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1608068140, now seen corresponding path program 10 times [2021-11-09 09:20:15,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:15,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532727889] [2021-11-09 09:20:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:15,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:15,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:20:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:15,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:15,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532727889] [2021-11-09 09:20:15,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532727889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:15,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597557265] [2021-11-09 09:20:15,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:20:15,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:15,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:15,453 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:15,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:20:16,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:20:16,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:16,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 09:20:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:16,364 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:20:16,364 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 23 [2021-11-09 09:20:16,690 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 25 treesize of output 21 [2021-11-09 09:20:17,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:17,839 INFO L354 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2021-11-09 09:20:17,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 80 [2021-11-09 09:20:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-09 09:20:18,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597557265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:18,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:18,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-11-09 09:20:18,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818627746] [2021-11-09 09:20:18,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:20:18,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:18,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:20:18,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:20:18,061 INFO L87 Difference]: Start difference. First operand 296 states and 329 transitions. Second operand has 37 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 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) [2021-11-09 09:20:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:23,760 INFO L93 Difference]: Finished difference Result 436 states and 477 transitions. [2021-11-09 09:20:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:20:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 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 54 [2021-11-09 09:20:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:23,763 INFO L225 Difference]: With dead ends: 436 [2021-11-09 09:20:23,763 INFO L226 Difference]: Without dead ends: 436 [2021-11-09 09:20:23,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=592, Invalid=6890, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:20:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-09 09:20:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 302. [2021-11-09 09:20:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 289 states have (on average 1.1314878892733564) internal successors, (327), 291 states have internal predecessors, (327), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:20:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 337 transitions. [2021-11-09 09:20:23,780 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 337 transitions. Word has length 54 [2021-11-09 09:20:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:23,780 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 337 transitions. [2021-11-09 09:20:23,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 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) [2021-11-09 09:20:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 337 transitions. [2021-11-09 09:20:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 09:20:23,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:23,782 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:23,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:23,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 09:20:23,997 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:20:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:23,997 INFO L85 PathProgramCache]: Analyzing trace with hash 834745037, now seen corresponding path program 11 times [2021-11-09 09:20:23,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:23,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341492611] [2021-11-09 09:20:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:23,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:25,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:20:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 30 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:20:25,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:25,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341492611] [2021-11-09 09:20:25,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341492611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:25,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032950513] [2021-11-09 09:20:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:20:25,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:25,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:25,158 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:25,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:20:26,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 09:20:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 09:20:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:26,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:20:37,468 INFO L354 Elim1Store]: treesize reduction 223, result has 9.7 percent of original size [2021-11-09 09:20:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 56 [2021-11-09 09:20:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 71 refuted. 14 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:20:37,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032950513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:37,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:37,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-11-09 09:20:37,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396495187] [2021-11-09 09:20:37,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 09:20:37,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 09:20:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2212, Unknown=20, NotChecked=0, Total=2450 [2021-11-09 09:20:37,483 INFO L87 Difference]: Start difference. First operand 302 states and 337 transitions. Second operand has 50 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 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) [2021-11-09 09:20:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:41,877 INFO L93 Difference]: Finished difference Result 415 states and 461 transitions. [2021-11-09 09:20:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 09:20:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 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 56 [2021-11-09 09:20:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:41,879 INFO L225 Difference]: With dead ends: 415 [2021-11-09 09:20:41,880 INFO L226 Difference]: Without dead ends: 399 [2021-11-09 09:20:41,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=911, Invalid=7625, Unknown=20, NotChecked=0, Total=8556 [2021-11-09 09:20:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-09 09:20:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 342. [2021-11-09 09:20:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 327 states have (on average 1.1406727828746177) internal successors, (373), 329 states have internal predecessors, (373), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:20:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 385 transitions. [2021-11-09 09:20:41,889 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 385 transitions. Word has length 56 [2021-11-09 09:20:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:41,890 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 385 transitions. [2021-11-09 09:20:41,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 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) [2021-11-09 09:20:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 385 transitions. [2021-11-09 09:20:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:20:41,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:41,892 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:41,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:42,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:42,105 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:20:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash 761298969, now seen corresponding path program 6 times [2021-11-09 09:20:42,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:42,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337174561] [2021-11-09 09:20:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:42,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:42,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:20:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:20:42,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:42,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337174561] [2021-11-09 09:20:42,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337174561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:42,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753901328] [2021-11-09 09:20:42,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:20:42,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:42,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:42,715 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:42,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:20:43,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:20:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-09 09:20:43,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:43,725 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 [2021-11-09 09:20:44,232 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 [2021-11-09 09:20:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-09 09:20:44,622 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-09 09:20:44,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 36 [2021-11-09 09:20:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:44,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-09 09:20:44,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:20:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:20:44,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753901328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:44,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:44,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 31 [2021-11-09 09:20:44,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803637121] [2021-11-09 09:20:44,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:20:44,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:44,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:20:44,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:20:44,860 INFO L87 Difference]: Start difference. First operand 342 states and 385 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 28 states have internal predecessors, (73), 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) [2021-11-09 09:20:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:46,226 INFO L93 Difference]: Finished difference Result 526 states and 592 transitions. [2021-11-09 09:20:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:20:46,227 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 28 states have internal predecessors, (73), 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 57 [2021-11-09 09:20:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:46,228 INFO L225 Difference]: With dead ends: 526 [2021-11-09 09:20:46,229 INFO L226 Difference]: Without dead ends: 466 [2021-11-09 09:20:46,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=2610, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:20:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-09 09:20:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 450. [2021-11-09 09:20:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 431 states have (on average 1.1392111368909512) internal successors, (491), 433 states have internal predecessors, (491), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:20:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 507 transitions. [2021-11-09 09:20:46,240 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 507 transitions. Word has length 57 [2021-11-09 09:20:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:46,240 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 507 transitions. [2021-11-09 09:20:46,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 28 states have internal predecessors, (73), 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) [2021-11-09 09:20:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 507 transitions. [2021-11-09 09:20:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:20:46,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:46,242 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2021-11-09 09:20:46,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:46,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 09:20:46,469 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:20:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash -917832412, now seen corresponding path program 4 times [2021-11-09 09:20:46,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:46,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635734406] [2021-11-09 09:20:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:46,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:46,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:20:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:20:46,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:46,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635734406] [2021-11-09 09:20:46,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635734406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:46,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643990834] [2021-11-09 09:20:46,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:20:46,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:46,781 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:46,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:20:48,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:20:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:48,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 09:20:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:48,138 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:20:48,138 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 23 [2021-11-09 09:20:48,414 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 25 treesize of output 21 [2021-11-09 09:20:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:49,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:49,176 INFO L354 Elim1Store]: treesize reduction 18, result has 64.7 percent of original size [2021-11-09 09:20:49,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 69 [2021-11-09 09:20:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 09:20:49,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643990834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:49,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:49,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-11-09 09:20:49,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404674855] [2021-11-09 09:20:49,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:20:49,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:20:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:20:49,455 INFO L87 Difference]: Start difference. First operand 450 states and 507 transitions. Second operand has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 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) [2021-11-09 09:20:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:53,895 INFO L93 Difference]: Finished difference Result 582 states and 639 transitions. [2021-11-09 09:20:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 09:20:53,896 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 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 58 [2021-11-09 09:20:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:53,898 INFO L225 Difference]: With dead ends: 582 [2021-11-09 09:20:53,898 INFO L226 Difference]: Without dead ends: 554 [2021-11-09 09:20:53,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=503, Invalid=5659, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 09:20:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-09 09:20:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 450. [2021-11-09 09:20:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 431 states have (on average 1.122969837587007) internal successors, (484), 433 states have internal predecessors, (484), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:20:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 500 transitions. [2021-11-09 09:20:53,911 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 500 transitions. Word has length 58 [2021-11-09 09:20:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:53,911 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 500 transitions. [2021-11-09 09:20:53,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 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) [2021-11-09 09:20:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 500 transitions. [2021-11-09 09:20:53,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:20:53,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:53,913 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:53,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:54,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 09:20:54,141 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:20:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1187303152, now seen corresponding path program 12 times [2021-11-09 09:20:54,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:54,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714431490] [2021-11-09 09:20:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:54,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:54,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:20:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:54,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:54,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714431490] [2021-11-09 09:20:54,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714431490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:54,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146646550] [2021-11-09 09:20:54,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:20:54,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:54,519 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:54,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:20:55,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 09:20:55,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:55,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:20:55,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:55,680 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:20:55,680 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 [2021-11-09 09:20:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:56,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146646550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:56,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:56,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-11-09 09:20:56,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556176713] [2021-11-09 09:20:56,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:20:56,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:56,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:20:56,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:20:56,433 INFO L87 Difference]: Start difference. First operand 450 states and 500 transitions. Second operand has 41 states, 40 states have (on average 2.675) internal successors, (107), 38 states have internal predecessors, (107), 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) [2021-11-09 09:20:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:57,519 INFO L93 Difference]: Finished difference Result 628 states and 690 transitions. [2021-11-09 09:20:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:20:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.675) internal successors, (107), 38 states have internal predecessors, (107), 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 60 [2021-11-09 09:20:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:57,527 INFO L225 Difference]: With dead ends: 628 [2021-11-09 09:20:57,527 INFO L226 Difference]: Without dead ends: 628 [2021-11-09 09:20:57,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:20:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-09 09:20:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 458. [2021-11-09 09:20:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 439 states have (on average 1.1275626423690206) internal successors, (495), 441 states have internal predecessors, (495), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:20:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 511 transitions. [2021-11-09 09:20:57,539 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 511 transitions. Word has length 60 [2021-11-09 09:20:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:57,539 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 511 transitions. [2021-11-09 09:20:57,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.675) internal successors, (107), 38 states have internal predecessors, (107), 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) [2021-11-09 09:20:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 511 transitions. [2021-11-09 09:20:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:20:57,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:57,541 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-09 09:20:57,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:57,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:57,768 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:20:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:57,768 INFO L85 PathProgramCache]: Analyzing trace with hash 297185571, now seen corresponding path program 5 times [2021-11-09 09:20:57,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:57,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697006405] [2021-11-09 09:20:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:57,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:58,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:20:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:20:58,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:58,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697006405] [2021-11-09 09:20:58,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697006405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:58,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543995567] [2021-11-09 09:20:58,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:20:58,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:58,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:58,337 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:58,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:20:59,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:20:59,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:20:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:00,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:21:00,237 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-11-09 09:21:00,238 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 34 treesize of output 24 [2021-11-09 09:21:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:21:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543995567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:00,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:00,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-11-09 09:21:00,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420129687] [2021-11-09 09:21:00,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:21:00,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:21:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:21:00,286 INFO L87 Difference]: Start difference. First operand 458 states and 511 transitions. Second operand has 34 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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) [2021-11-09 09:21:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:01,725 INFO L93 Difference]: Finished difference Result 478 states and 531 transitions. [2021-11-09 09:21:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:21:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 60 [2021-11-09 09:21:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:01,727 INFO L225 Difference]: With dead ends: 478 [2021-11-09 09:21:01,728 INFO L226 Difference]: Without dead ends: 470 [2021-11-09 09:21:01,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=538, Invalid=2884, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 09:21:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-09 09:21:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 458. [2021-11-09 09:21:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 440 states have (on average 1.1272727272727272) internal successors, (496), 442 states have internal predecessors, (496), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:21:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 511 transitions. [2021-11-09 09:21:01,746 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 511 transitions. Word has length 60 [2021-11-09 09:21:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:01,747 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 511 transitions. [2021-11-09 09:21:01,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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) [2021-11-09 09:21:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 511 transitions. [2021-11-09 09:21:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:21:01,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:01,749 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1] [2021-11-09 09:21:01,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-09 09:21:01,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-09 09:21:01,965 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:21:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1017640310, now seen corresponding path program 7 times [2021-11-09 09:21:01,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:01,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459199428] [2021-11-09 09:21:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:01,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:02,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:21:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:21:02,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:02,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459199428] [2021-11-09 09:21:02,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459199428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:02,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080272281] [2021-11-09 09:21:02,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:21:02,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:02,213 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:02,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:21:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:03,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:21:03,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:03,788 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:21:03,788 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 15 treesize of output 20 [2021-11-09 09:21:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:21:05,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080272281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:05,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:05,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-11-09 09:21:05,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366122840] [2021-11-09 09:21:05,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:21:05,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:21:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:21:05,040 INFO L87 Difference]: Start difference. First operand 458 states and 511 transitions. Second operand has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 24 states have internal predecessors, (86), 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) [2021-11-09 09:21:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:06,221 INFO L93 Difference]: Finished difference Result 481 states and 530 transitions. [2021-11-09 09:21:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:21:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 24 states have internal predecessors, (86), 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 61 [2021-11-09 09:21:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:06,230 INFO L225 Difference]: With dead ends: 481 [2021-11-09 09:21:06,230 INFO L226 Difference]: Without dead ends: 481 [2021-11-09 09:21:06,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:21:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-09 09:21:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 471. [2021-11-09 09:21:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 453 states have (on average 1.1236203090507726) internal successors, (509), 455 states have internal predecessors, (509), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:21:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2021-11-09 09:21:06,238 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 61 [2021-11-09 09:21:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:06,238 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2021-11-09 09:21:06,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 24 states have internal predecessors, (86), 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) [2021-11-09 09:21:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2021-11-09 09:21:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 09:21:06,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:06,240 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:06,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:06,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:06,459 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:21:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1462972681, now seen corresponding path program 13 times [2021-11-09 09:21:06,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:06,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914993410] [2021-11-09 09:21:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:06,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:08,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:21:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:21:08,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:08,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914993410] [2021-11-09 09:21:08,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914993410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:08,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419587312] [2021-11-09 09:21:08,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:21:08,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:08,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:08,089 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:08,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:21:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:09,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-09 09:21:09,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:09,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:21:25,510 INFO L354 Elim1Store]: treesize reduction 302, result has 8.5 percent of original size [2021-11-09 09:21:25,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 64 [2021-11-09 09:21:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 97 refuted. 20 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:21:25,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419587312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:25,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:25,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 56 [2021-11-09 09:21:25,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948876761] [2021-11-09 09:21:25,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 09:21:25,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:25,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 09:21:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2779, Unknown=27, NotChecked=0, Total=3080 [2021-11-09 09:21:25,531 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand has 56 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 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) [2021-11-09 09:21:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:31,187 INFO L93 Difference]: Finished difference Result 627 states and 695 transitions. [2021-11-09 09:21:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:21:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 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 62 [2021-11-09 09:21:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:31,190 INFO L225 Difference]: With dead ends: 627 [2021-11-09 09:21:31,190 INFO L226 Difference]: Without dead ends: 609 [2021-11-09 09:21:31,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1170, Invalid=9933, Unknown=27, NotChecked=0, Total=11130 [2021-11-09 09:21:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-09 09:21:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 535. [2021-11-09 09:21:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 514 states have (on average 1.132295719844358) internal successors, (582), 516 states have internal predecessors, (582), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:21:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 600 transitions. [2021-11-09 09:21:31,202 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 600 transitions. Word has length 62 [2021-11-09 09:21:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:31,203 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 600 transitions. [2021-11-09 09:21:31,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 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) [2021-11-09 09:21:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 600 transitions. [2021-11-09 09:21:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:21:31,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:31,205 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 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] [2021-11-09 09:21:31,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:31,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:31,425 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:21:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1079428576, now seen corresponding path program 6 times [2021-11-09 09:21:31,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:31,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749194806] [2021-11-09 09:21:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:31,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:31,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:21:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:21:31,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:31,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749194806] [2021-11-09 09:21:31,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749194806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:31,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380050340] [2021-11-09 09:21:31,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:21:31,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:31,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:31,805 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:31,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:21:33,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:21:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:21:33,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:33,417 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:21:33,418 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 [2021-11-09 09:21:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:21:34,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380050340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:34,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:34,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-11-09 09:21:34,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970111953] [2021-11-09 09:21:34,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:21:34,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:21:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:21:34,189 INFO L87 Difference]: Start difference. First operand 535 states and 600 transitions. Second operand has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 36 states have internal predecessors, (115), 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) [2021-11-09 09:21:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:35,494 INFO L93 Difference]: Finished difference Result 694 states and 760 transitions. [2021-11-09 09:21:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:21:35,494 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 36 states have internal predecessors, (115), 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 64 [2021-11-09 09:21:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:35,497 INFO L225 Difference]: With dead ends: 694 [2021-11-09 09:21:35,497 INFO L226 Difference]: Without dead ends: 667 [2021-11-09 09:21:35,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:21:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-09 09:21:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 533. [2021-11-09 09:21:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 512 states have (on average 1.1171875) internal successors, (572), 514 states have internal predecessors, (572), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:21:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 590 transitions. [2021-11-09 09:21:35,511 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 590 transitions. Word has length 64 [2021-11-09 09:21:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:35,512 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 590 transitions. [2021-11-09 09:21:35,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 36 states have internal predecessors, (115), 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) [2021-11-09 09:21:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 590 transitions. [2021-11-09 09:21:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:21:35,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:35,514 INFO L513 BasicCegarLoop]: trace histogram [5, 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, 1] [2021-11-09 09:21:35,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:35,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:35,729 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:21:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash 339252990, now seen corresponding path program 8 times [2021-11-09 09:21:35,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:35,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101942416] [2021-11-09 09:21:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:35,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:36,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:21:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:36,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:36,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101942416] [2021-11-09 09:21:36,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101942416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:36,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132568904] [2021-11-09 09:21:36,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:21:36,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:36,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:36,598 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:36,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:21:38,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:21:38,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-09 09:21:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:38,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:21:38,628 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-09 09:21:38,628 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 [2021-11-09 09:21:39,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:21:39,187 INFO L354 Elim1Store]: treesize reduction 98, result has 27.9 percent of original size [2021-11-09 09:21:39,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 60 [2021-11-09 09:21:39,578 INFO L354 Elim1Store]: treesize reduction 34, result has 47.7 percent of original size [2021-11-09 09:21:39,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 77 [2021-11-09 09:21:39,821 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-09 09:21:39,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-09 09:21:39,991 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-09 09:21:39,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 20 [2021-11-09 09:21:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:21:40,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132568904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:40,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:40,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 49 [2021-11-09 09:21:40,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793447978] [2021-11-09 09:21:40,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:21:40,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:21:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:21:40,003 INFO L87 Difference]: Start difference. First operand 533 states and 590 transitions. Second operand has 49 states, 48 states have (on average 2.125) internal successors, (102), 46 states have internal predecessors, (102), 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) [2021-11-09 09:21:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:44,105 INFO L93 Difference]: Finished difference Result 817 states and 900 transitions. [2021-11-09 09:21:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:21:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.125) internal successors, (102), 46 states have internal predecessors, (102), 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 65 [2021-11-09 09:21:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:44,108 INFO L225 Difference]: With dead ends: 817 [2021-11-09 09:21:44,108 INFO L226 Difference]: Without dead ends: 665 [2021-11-09 09:21:44,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=622, Invalid=9080, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 09:21:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-09 09:21:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 635. [2021-11-09 09:21:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 612 states have (on average 1.1160130718954249) internal successors, (683), 614 states have internal predecessors, (683), 19 states have call successors, (19), 19 states have call predecessors, (19), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:21:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 703 transitions. [2021-11-09 09:21:44,118 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 703 transitions. Word has length 65 [2021-11-09 09:21:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:44,118 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 703 transitions. [2021-11-09 09:21:44,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.125) internal successors, (102), 46 states have internal predecessors, (102), 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) [2021-11-09 09:21:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 703 transitions. [2021-11-09 09:21:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:21:44,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:44,120 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:44,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:44,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 09:21:44,337 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:21:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash -419942132, now seen corresponding path program 14 times [2021-11-09 09:21:44,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:44,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937974897] [2021-11-09 09:21:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:44,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:44,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:21:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:44,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:44,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937974897] [2021-11-09 09:21:44,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937974897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:44,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588891284] [2021-11-09 09:21:44,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:21:44,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:44,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:44,829 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:44,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:21:46,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:21:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:46,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 09:21:46,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:46,469 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:21:46,469 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 [2021-11-09 09:21:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 91 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:47,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588891284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:47,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:47,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2021-11-09 09:21:47,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272088677] [2021-11-09 09:21:47,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 09:21:47,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 09:21:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:21:47,345 INFO L87 Difference]: Start difference. First operand 635 states and 703 transitions. Second operand has 44 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 41 states have internal predecessors, (119), 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) [2021-11-09 09:21:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:48,632 INFO L93 Difference]: Finished difference Result 881 states and 967 transitions. [2021-11-09 09:21:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:21:48,633 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 41 states have internal predecessors, (119), 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 66 [2021-11-09 09:21:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:48,636 INFO L225 Difference]: With dead ends: 881 [2021-11-09 09:21:48,636 INFO L226 Difference]: Without dead ends: 881 [2021-11-09 09:21:48,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=2661, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:21:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-11-09 09:21:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 645. [2021-11-09 09:21:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 622 states have (on average 1.1205787781350482) internal successors, (697), 624 states have internal predecessors, (697), 19 states have call successors, (19), 19 states have call predecessors, (19), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:21:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 717 transitions. [2021-11-09 09:21:48,651 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 717 transitions. Word has length 66 [2021-11-09 09:21:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:48,652 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 717 transitions. [2021-11-09 09:21:48,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 41 states have internal predecessors, (119), 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) [2021-11-09 09:21:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 717 transitions. [2021-11-09 09:21:48,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:21:48,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:48,654 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 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] [2021-11-09 09:21:48,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:48,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 09:21:48,881 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:21:48,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:48,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1811502369, now seen corresponding path program 7 times [2021-11-09 09:21:48,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:48,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286453115] [2021-11-09 09:21:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:48,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:49,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:21:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:21:49,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:49,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286453115] [2021-11-09 09:21:49,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286453115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:49,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573929916] [2021-11-09 09:21:49,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:21:49,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:49,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:49,654 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:49,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:21:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:51,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:21:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:51,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:21:52,038 INFO L354 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-11-09 09:21:52,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 32 [2021-11-09 09:21:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:21:52,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573929916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:52,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:52,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-11-09 09:21:52,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814775214] [2021-11-09 09:21:52,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:21:52,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:21:52,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:21:52,070 INFO L87 Difference]: Start difference. First operand 645 states and 717 transitions. Second operand has 39 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 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) [2021-11-09 09:21:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:54,426 INFO L93 Difference]: Finished difference Result 678 states and 750 transitions. [2021-11-09 09:21:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 09:21:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 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 66 [2021-11-09 09:21:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:54,429 INFO L225 Difference]: With dead ends: 678 [2021-11-09 09:21:54,429 INFO L226 Difference]: Without dead ends: 658 [2021-11-09 09:21:54,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=688, Invalid=4568, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:21:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-11-09 09:21:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 643. [2021-11-09 09:21:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 622 states have (on average 1.1205787781350482) internal successors, (697), 624 states have internal predecessors, (697), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:21:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 715 transitions. [2021-11-09 09:21:54,439 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 715 transitions. Word has length 66 [2021-11-09 09:21:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:54,439 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 715 transitions. [2021-11-09 09:21:54,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 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) [2021-11-09 09:21:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 715 transitions. [2021-11-09 09:21:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 09:21:54,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:54,441 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:54,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:54,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 09:21:54,657 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:21:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:54,657 INFO L85 PathProgramCache]: Analyzing trace with hash 162537989, now seen corresponding path program 15 times [2021-11-09 09:21:54,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:54,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327335969] [2021-11-09 09:21:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:54,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:56,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:21:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 54 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:21:56,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:56,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327335969] [2021-11-09 09:21:56,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327335969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:56,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148058925] [2021-11-09 09:21:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:21:56,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:56,641 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:56,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:21:58,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:21:58,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-09 09:21:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:59,001 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 44 treesize of output 40 [2021-11-09 09:22:00,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:22:00,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 35 [2021-11-09 09:22:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:22:00,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148058925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:00,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:22:00,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 56 [2021-11-09 09:22:00,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85335540] [2021-11-09 09:22:00,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 09:22:00,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:22:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 09:22:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2817, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:22:00,534 INFO L87 Difference]: Start difference. First operand 643 states and 715 transitions. Second operand has 56 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 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) [2021-11-09 09:22:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:22:04,192 INFO L93 Difference]: Finished difference Result 851 states and 943 transitions. [2021-11-09 09:22:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 09:22:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 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 68 [2021-11-09 09:22:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:22:04,196 INFO L225 Difference]: With dead ends: 851 [2021-11-09 09:22:04,196 INFO L226 Difference]: Without dead ends: 831 [2021-11-09 09:22:04,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=827, Invalid=9273, Unknown=0, NotChecked=0, Total=10100 [2021-11-09 09:22:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-09 09:22:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 735. [2021-11-09 09:22:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 710 states have (on average 1.1295774647887324) internal successors, (802), 712 states have internal predecessors, (802), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:22:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 824 transitions. [2021-11-09 09:22:04,205 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 824 transitions. Word has length 68 [2021-11-09 09:22:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:22:04,205 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 824 transitions. [2021-11-09 09:22:04,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 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) [2021-11-09 09:22:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 824 transitions. [2021-11-09 09:22:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 09:22:04,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:22:04,207 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 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] [2021-11-09 09:22:04,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-09 09:22:04,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 09:22:04,420 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:22:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:22:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -152653476, now seen corresponding path program 8 times [2021-11-09 09:22:04,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:22:04,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949090111] [2021-11-09 09:22:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:22:04,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:22:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:04,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:22:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:22:04,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:22:04,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949090111] [2021-11-09 09:22:04,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949090111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:04,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262426635] [2021-11-09 09:22:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:22:04,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:22:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:22:04,837 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:22:04,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:22:06,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:22:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:22:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 09:22:06,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:22:06,671 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:22:06,671 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 [2021-11-09 09:22:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 66 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:22:07,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262426635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:07,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:22:07,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-11-09 09:22:07,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516829508] [2021-11-09 09:22:07,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:22:07,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:22:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:22:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:22:07,499 INFO L87 Difference]: Start difference. First operand 735 states and 824 transitions. Second operand has 42 states, 41 states have (on average 3.097560975609756) internal successors, (127), 39 states have internal predecessors, (127), 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) [2021-11-09 09:22:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:22:08,557 INFO L93 Difference]: Finished difference Result 941 states and 1032 transitions. [2021-11-09 09:22:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:22:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.097560975609756) internal successors, (127), 39 states have internal predecessors, (127), 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 70 [2021-11-09 09:22:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:22:08,561 INFO L225 Difference]: With dead ends: 941 [2021-11-09 09:22:08,561 INFO L226 Difference]: Without dead ends: 908 [2021-11-09 09:22:08,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=2477, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:22:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-11-09 09:22:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 717. [2021-11-09 09:22:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 692 states have (on average 1.1141618497109826) internal successors, (771), 694 states have internal predecessors, (771), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:22:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 793 transitions. [2021-11-09 09:22:08,576 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 793 transitions. Word has length 70 [2021-11-09 09:22:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:22:08,577 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 793 transitions. [2021-11-09 09:22:08,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.097560975609756) internal successors, (127), 39 states have internal predecessors, (127), 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) [2021-11-09 09:22:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 793 transitions. [2021-11-09 09:22:08,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 09:22:08,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:22:08,579 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:22:08,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-09 09:22:08,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 09:22:08,795 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:22:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:22:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1872243768, now seen corresponding path program 16 times [2021-11-09 09:22:08,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:22:08,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910295603] [2021-11-09 09:22:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:22:08,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:22:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:09,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:22:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:22:09,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:22:09,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910295603] [2021-11-09 09:22:09,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910295603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:09,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567882899] [2021-11-09 09:22:09,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:22:09,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:22:09,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:22:09,324 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:22:09,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:22:10,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:22:10,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:22:10,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-09 09:22:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:22:11,075 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:22:11,075 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 23 [2021-11-09 09:22:11,479 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 25 treesize of output 21 [2021-11-09 09:22:13,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:13,547 INFO L354 Elim1Store]: treesize reduction 42, result has 59.2 percent of original size [2021-11-09 09:22:13,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 09:22:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-09 09:22:13,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567882899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:13,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:22:13,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 48 [2021-11-09 09:22:13,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255958255] [2021-11-09 09:22:13,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:22:13,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:22:13,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:22:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2208, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:22:13,942 INFO L87 Difference]: Start difference. First operand 717 states and 793 transitions. Second operand has 49 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 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) [2021-11-09 09:22:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:22:23,623 INFO L93 Difference]: Finished difference Result 1051 states and 1150 transitions. [2021-11-09 09:22:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 09:22:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 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 72 [2021-11-09 09:22:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:22:23,628 INFO L225 Difference]: With dead ends: 1051 [2021-11-09 09:22:23,628 INFO L226 Difference]: Without dead ends: 1051 [2021-11-09 09:22:23,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=806, Invalid=12304, Unknown=0, NotChecked=0, Total=13110 [2021-11-09 09:22:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-11-09 09:22:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 727. [2021-11-09 09:22:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 702 states have (on average 1.1182336182336183) internal successors, (785), 704 states have internal predecessors, (785), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:22:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 807 transitions. [2021-11-09 09:22:23,641 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 807 transitions. Word has length 72 [2021-11-09 09:22:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:22:23,641 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 807 transitions. [2021-11-09 09:22:23,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 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) [2021-11-09 09:22:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 807 transitions. [2021-11-09 09:22:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 09:22:23,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:22:23,644 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 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] [2021-11-09 09:22:23,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-09 09:22:23,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:22:23,865 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:22:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:22:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1695094619, now seen corresponding path program 9 times [2021-11-09 09:22:23,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:22:23,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564081725] [2021-11-09 09:22:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:22:23,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:22:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:25,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:22:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:22:25,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:22:25,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564081725] [2021-11-09 09:22:25,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564081725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:25,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238175416] [2021-11-09 09:22:25,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:22:25,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:22:25,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:22:25,278 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:22:25,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:22:27,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 09:22:27,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:22:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-09 09:22:27,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:22:27,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:22:27,198 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:22:27,198 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-09 09:22:28,224 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 25 treesize of output 21 [2021-11-09 09:22:28,897 INFO L354 Elim1Store]: treesize reduction 18, result has 72.3 percent of original size [2021-11-09 09:22:28,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 75 [2021-11-09 09:22:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 09:22:29,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238175416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:29,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:22:29,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2021-11-09 09:22:29,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346198074] [2021-11-09 09:22:29,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 09:22:29,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:22:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 09:22:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2480, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:22:29,507 INFO L87 Difference]: Start difference. First operand 727 states and 807 transitions. Second operand has 52 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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) [2021-11-09 09:22:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:22:39,227 INFO L93 Difference]: Finished difference Result 825 states and 909 transitions. [2021-11-09 09:22:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 09:22:39,228 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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 72 [2021-11-09 09:22:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:22:39,232 INFO L225 Difference]: With dead ends: 825 [2021-11-09 09:22:39,233 INFO L226 Difference]: Without dead ends: 813 [2021-11-09 09:22:39,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=738, Invalid=8768, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 09:22:39,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-11-09 09:22:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 747. [2021-11-09 09:22:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 723 states have (on average 1.1217150760719226) internal successors, (811), 725 states have internal predecessors, (811), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:22:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 832 transitions. [2021-11-09 09:22:39,249 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 832 transitions. Word has length 72 [2021-11-09 09:22:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:22:39,250 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 832 transitions. [2021-11-09 09:22:39,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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) [2021-11-09 09:22:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 832 transitions. [2021-11-09 09:22:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 09:22:39,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:22:39,253 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1] [2021-11-09 09:22:39,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:22:39,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-09 09:22:39,469 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:22:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:22:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash -819485192, now seen corresponding path program 9 times [2021-11-09 09:22:39,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:22:39,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072268358] [2021-11-09 09:22:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:22:39,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:22:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:39,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:22:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 09:22:39,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:22:39,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072268358] [2021-11-09 09:22:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072268358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:39,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296264964] [2021-11-09 09:22:39,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:22:39,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:22:39,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:22:39,881 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:22:39,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:22:42,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:22:42,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:22:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:22:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:22:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 09:22:42,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296264964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:42,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:22:42,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-11-09 09:22:42,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125109156] [2021-11-09 09:22:42,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:22:42,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:22:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:22:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:22:42,696 INFO L87 Difference]: Start difference. First operand 747 states and 832 transitions. Second operand has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 28 states have internal predecessors, (101), 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) [2021-11-09 09:22:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:22:43,712 INFO L93 Difference]: Finished difference Result 777 states and 857 transitions. [2021-11-09 09:22:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:22:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 28 states have internal predecessors, (101), 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 73 [2021-11-09 09:22:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:22:43,716 INFO L225 Difference]: With dead ends: 777 [2021-11-09 09:22:43,716 INFO L226 Difference]: Without dead ends: 777 [2021-11-09 09:22:43,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=1648, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:22:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-11-09 09:22:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 764. [2021-11-09 09:22:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 740 states have (on average 1.1189189189189188) internal successors, (828), 742 states have internal predecessors, (828), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:22:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 849 transitions. [2021-11-09 09:22:43,726 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 849 transitions. Word has length 73 [2021-11-09 09:22:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:22:43,726 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 849 transitions. [2021-11-09 09:22:43,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 28 states have internal predecessors, (101), 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) [2021-11-09 09:22:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 849 transitions. [2021-11-09 09:22:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 09:22:43,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:22:43,729 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:22:43,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 09:22:43,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:22:43,945 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:22:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:22:43,945 INFO L85 PathProgramCache]: Analyzing trace with hash 365036993, now seen corresponding path program 17 times [2021-11-09 09:22:43,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:22:43,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078657595] [2021-11-09 09:22:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:22:43,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:22:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:46,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:22:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:22:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 69 proven. 183 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:22:46,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:22:46,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078657595] [2021-11-09 09:22:46,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078657595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:46,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300753389] [2021-11-09 09:22:46,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:22:46,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:22:46,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:22:46,395 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:22:46,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:22:48,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-09 09:22:48,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:22:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-09 09:22:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:22:48,600 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:22:48,601 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 23 [2021-11-09 09:22:49,107 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 25 treesize of output 21 [2021-11-09 09:22:51,281 INFO L354 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2021-11-09 09:22:51,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 91 treesize of output 91 [2021-11-09 09:22:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-09 09:22:51,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300753389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:22:51,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:22:51,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26] total 60 [2021-11-09 09:22:51,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743994454] [2021-11-09 09:22:51,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 09:22:51,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:22:51,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 09:22:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3353, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:22:51,687 INFO L87 Difference]: Start difference. First operand 764 states and 849 transitions. Second operand has 60 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 57 states have internal predecessors, (103), 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) [2021-11-09 09:23:03,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:03,855 INFO L93 Difference]: Finished difference Result 1029 states and 1143 transitions. [2021-11-09 09:23:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-09 09:23:03,856 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 57 states have internal predecessors, (103), 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 74 [2021-11-09 09:23:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:03,859 INFO L225 Difference]: With dead ends: 1029 [2021-11-09 09:23:03,859 INFO L226 Difference]: Without dead ends: 1007 [2021-11-09 09:23:03,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5343 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1200, Invalid=18540, Unknown=0, NotChecked=0, Total=19740 [2021-11-09 09:23:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-11-09 09:23:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 874. [2021-11-09 09:23:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 846 states have (on average 1.1300236406619386) internal successors, (956), 848 states have internal predecessors, (956), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:23:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 981 transitions. [2021-11-09 09:23:03,872 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 981 transitions. Word has length 74 [2021-11-09 09:23:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:03,872 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 981 transitions. [2021-11-09 09:23:03,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 57 states have internal predecessors, (103), 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) [2021-11-09 09:23:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 981 transitions. [2021-11-09 09:23:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 09:23:03,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:03,875 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 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] [2021-11-09 09:23:03,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:04,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:04,101 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:23:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:04,101 INFO L85 PathProgramCache]: Analyzing trace with hash -77807720, now seen corresponding path program 10 times [2021-11-09 09:23:04,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:04,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097557835] [2021-11-09 09:23:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:04,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:04,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:23:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 66 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:23:04,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:04,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097557835] [2021-11-09 09:23:04,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097557835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:04,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288771644] [2021-11-09 09:23:04,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:23:04,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:04,524 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:04,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:23:06,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:23:06,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 09:23:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:06,597 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:23:06,598 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 23 [2021-11-09 09:23:07,102 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 25 treesize of output 21 [2021-11-09 09:23:08,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:08,775 INFO L354 Elim1Store]: treesize reduction 36, result has 60.0 percent of original size [2021-11-09 09:23:08,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 102 [2021-11-09 09:23:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 09:23:09,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288771644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:09,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:09,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 46 [2021-11-09 09:23:09,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399623973] [2021-11-09 09:23:09,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 09:23:09,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 09:23:09,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2030, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:23:09,118 INFO L87 Difference]: Start difference. First operand 874 states and 981 transitions. Second operand has 47 states, 45 states have (on average 2.533333333333333) internal successors, (114), 44 states have internal predecessors, (114), 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) [2021-11-09 09:23:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:19,893 INFO L93 Difference]: Finished difference Result 1147 states and 1257 transitions. [2021-11-09 09:23:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 09:23:19,893 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.533333333333333) internal successors, (114), 44 states have internal predecessors, (114), 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 76 [2021-11-09 09:23:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:19,897 INFO L225 Difference]: With dead ends: 1147 [2021-11-09 09:23:19,897 INFO L226 Difference]: Without dead ends: 1106 [2021-11-09 09:23:19,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=831, Invalid=12279, Unknown=0, NotChecked=0, Total=13110 [2021-11-09 09:23:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-11-09 09:23:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-11-09 09:23:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 824 states have (on average 1.116504854368932) internal successors, (920), 826 states have internal predecessors, (920), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:23:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 945 transitions. [2021-11-09 09:23:19,909 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 945 transitions. Word has length 76 [2021-11-09 09:23:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:19,909 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 945 transitions. [2021-11-09 09:23:19,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.533333333333333) internal successors, (114), 44 states have internal predecessors, (114), 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) [2021-11-09 09:23:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 945 transitions. [2021-11-09 09:23:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:23:19,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:19,911 INFO L513 BasicCegarLoop]: trace histogram [6, 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, 1] [2021-11-09 09:23:19,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:20,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-09 09:23:20,111 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:23:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash 109590144, now seen corresponding path program 10 times [2021-11-09 09:23:20,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:20,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016522133] [2021-11-09 09:23:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:20,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:21,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:23:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 16 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:23:21,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:21,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016522133] [2021-11-09 09:23:21,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016522133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:21,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029367714] [2021-11-09 09:23:21,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:23:21,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:21,028 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:21,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 09:23:23,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:23:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:23,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 09:23:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:23,206 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:23:23,206 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 [2021-11-09 09:23:23,215 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 [2021-11-09 09:23:23,905 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 16 treesize of output 12 [2021-11-09 09:23:23,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-09 09:23:24,365 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-09 09:23:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 52 [2021-11-09 09:23:24,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2021-11-09 09:23:24,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2021-11-09 09:23:24,963 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 09:23:24,963 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 36 treesize of output 35 [2021-11-09 09:23:25,118 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 [2021-11-09 09:23:25,123 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-09 09:23:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2021-11-09 09:23:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 09:23:25,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029367714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:25,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:25,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22] total 52 [2021-11-09 09:23:25,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142049385] [2021-11-09 09:23:25,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 09:23:25,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 09:23:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2501, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:23:25,134 INFO L87 Difference]: Start difference. First operand 852 states and 945 transitions. Second operand has 52 states, 51 states have (on average 2.392156862745098) internal successors, (122), 49 states have internal predecessors, (122), 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) [2021-11-09 09:23:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:35,596 INFO L93 Difference]: Finished difference Result 1311 states and 1439 transitions. [2021-11-09 09:23:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-09 09:23:35,597 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.392156862745098) internal successors, (122), 49 states have internal predecessors, (122), 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 77 [2021-11-09 09:23:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:35,602 INFO L225 Difference]: With dead ends: 1311 [2021-11-09 09:23:35,603 INFO L226 Difference]: Without dead ends: 1107 [2021-11-09 09:23:35,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4107 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1085, Invalid=15685, Unknown=0, NotChecked=0, Total=16770 [2021-11-09 09:23:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-11-09 09:23:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1004. [2021-11-09 09:23:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 972 states have (on average 1.118312757201646) internal successors, (1087), 974 states have internal predecessors, (1087), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:23:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1116 transitions. [2021-11-09 09:23:35,622 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1116 transitions. Word has length 77 [2021-11-09 09:23:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:35,622 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1116 transitions. [2021-11-09 09:23:35,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.392156862745098) internal successors, (122), 49 states have internal predecessors, (122), 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) [2021-11-09 09:23:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1116 transitions. [2021-11-09 09:23:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 09:23:35,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:35,624 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 3, 3, 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] [2021-11-09 09:23:35,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-09 09:23:35,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-09 09:23:35,825 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:23:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:35,825 INFO L85 PathProgramCache]: Analyzing trace with hash 295696023, now seen corresponding path program 11 times [2021-11-09 09:23:35,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:35,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707772999] [2021-11-09 09:23:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:35,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:37,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:23:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 24 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:23:37,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:37,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707772999] [2021-11-09 09:23:37,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707772999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:37,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484940379] [2021-11-09 09:23:37,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:23:37,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:37,552 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:37,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 09:23:39,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 09:23:39,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-09 09:23:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:39,865 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:23:39,865 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 15 treesize of output 20 [2021-11-09 09:23:40,358 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 25 treesize of output 21 [2021-11-09 09:23:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:41,223 INFO L354 Elim1Store]: treesize reduction 26, result has 55.9 percent of original size [2021-11-09 09:23:41,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 65 [2021-11-09 09:23:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 57 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-09 09:23:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484940379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:41,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:41,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 22] total 51 [2021-11-09 09:23:41,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503252793] [2021-11-09 09:23:41,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 09:23:41,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:41,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 09:23:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2401, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:23:41,717 INFO L87 Difference]: Start difference. First operand 1004 states and 1116 transitions. Second operand has 51 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 48 states have internal predecessors, (112), 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) [2021-11-09 09:23:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:48,314 INFO L93 Difference]: Finished difference Result 1227 states and 1345 transitions. [2021-11-09 09:23:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 09:23:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 48 states have internal predecessors, (112), 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 78 [2021-11-09 09:23:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:48,319 INFO L225 Difference]: With dead ends: 1227 [2021-11-09 09:23:48,319 INFO L226 Difference]: Without dead ends: 1196 [2021-11-09 09:23:48,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3057 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=735, Invalid=10821, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 09:23:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-11-09 09:23:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1028. [2021-11-09 09:23:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 997 states have (on average 1.1213640922768304) internal successors, (1118), 999 states have internal predecessors, (1118), 27 states have call successors, (27), 27 states have call predecessors, (27), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:23:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1146 transitions. [2021-11-09 09:23:48,334 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1146 transitions. Word has length 78 [2021-11-09 09:23:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:48,334 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 1146 transitions. [2021-11-09 09:23:48,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 48 states have internal predecessors, (112), 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) [2021-11-09 09:23:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1146 transitions. [2021-11-09 09:23:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 09:23:48,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:48,337 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 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] [2021-11-09 09:23:48,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:48,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:48,553 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:23:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash 519369885, now seen corresponding path program 12 times [2021-11-09 09:23:48,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:48,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406733246] [2021-11-09 09:23:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:48,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:23:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-09 09:23:49,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:49,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406733246] [2021-11-09 09:23:49,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406733246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:49,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724527941] [2021-11-09 09:23:49,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:23:49,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:49,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:49,773 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:49,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 09:23:52,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:23:52,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 09:23:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:53,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:23:53,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:23:53,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2021-11-09 09:23:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-09 09:23:53,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724527941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:53,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:53,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 42 [2021-11-09 09:23:53,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172248162] [2021-11-09 09:23:53,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:23:53,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:23:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:23:53,621 INFO L87 Difference]: Start difference. First operand 1028 states and 1146 transitions. Second operand has 42 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:23:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:55,816 INFO L93 Difference]: Finished difference Result 1036 states and 1147 transitions. [2021-11-09 09:23:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:23:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 3 states have call successors, (5), 3 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 78 [2021-11-09 09:23:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:55,820 INFO L225 Difference]: With dead ends: 1036 [2021-11-09 09:23:55,820 INFO L226 Difference]: Without dead ends: 1016 [2021-11-09 09:23:55,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=568, Invalid=4544, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:23:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-11-09 09:23:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1004. [2021-11-09 09:23:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 975 states have (on average 1.116923076923077) internal successors, (1089), 977 states have internal predecessors, (1089), 25 states have call successors, (25), 25 states have call predecessors, (25), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:23:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1115 transitions. [2021-11-09 09:23:55,834 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1115 transitions. Word has length 78 [2021-11-09 09:23:55,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:55,834 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1115 transitions. [2021-11-09 09:23:55,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:23:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1115 transitions. [2021-11-09 09:23:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 09:23:55,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:55,837 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:55,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:56,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 09:23:56,065 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:23:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash -168280157, now seen corresponding path program 13 times [2021-11-09 09:23:56,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:56,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59064205] [2021-11-09 09:23:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:56,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:56,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:23:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 09:23:56,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:56,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59064205] [2021-11-09 09:23:56,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59064205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:56,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184153532] [2021-11-09 09:23:56,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:23:56,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:56,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:56,640 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:56,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 09:23:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 09:23:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:59,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:24:00,013 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-09 09:24:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2021-11-09 09:24:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 09:24:00,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184153532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:00,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:24:00,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-11-09 09:24:00,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435141964] [2021-11-09 09:24:00,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:24:00,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:24:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:24:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:24:00,057 INFO L87 Difference]: Start difference. First operand 1004 states and 1115 transitions. Second operand has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 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) [2021-11-09 09:24:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:24:01,170 INFO L93 Difference]: Finished difference Result 1000 states and 1110 transitions. [2021-11-09 09:24:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:24:01,173 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 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 78 [2021-11-09 09:24:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:24:01,178 INFO L225 Difference]: With dead ends: 1000 [2021-11-09 09:24:01,178 INFO L226 Difference]: Without dead ends: 994 [2021-11-09 09:24:01,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=433, Invalid=2219, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:24:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-11-09 09:24:01,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 994. [2021-11-09 09:24:01,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 966 states have (on average 1.1159420289855073) internal successors, (1078), 968 states have internal predecessors, (1078), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:24:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1103 transitions. [2021-11-09 09:24:01,199 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1103 transitions. Word has length 78 [2021-11-09 09:24:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:24:01,200 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 1103 transitions. [2021-11-09 09:24:01,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 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) [2021-11-09 09:24:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1103 transitions. [2021-11-09 09:24:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:24:01,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:24:01,202 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:24:01,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 09:24:01,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:01,420 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:24:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:24:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -839984067, now seen corresponding path program 18 times [2021-11-09 09:24:01,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:24:01,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247589914] [2021-11-09 09:24:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:24:01,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:24:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:04,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:24:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 86 proven. 224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:24:04,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:24:04,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247589914] [2021-11-09 09:24:04,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247589914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:04,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465749258] [2021-11-09 09:24:04,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:24:04,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:04,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:24:04,045 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:24:04,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 09:24:06,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-09 09:24:06,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:24:06,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-09 09:24:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:24:07,621 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 54 treesize of output 50 [2021-11-09 09:24:10,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:24:10,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 43 [2021-11-09 09:24:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 30 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:24:10,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465749258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:10,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:24:10,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 68 [2021-11-09 09:24:10,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691390656] [2021-11-09 09:24:10,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 09:24:10,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:24:10,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 09:24:10,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=4193, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:24:10,030 INFO L87 Difference]: Start difference. First operand 994 states and 1103 transitions. Second operand has 68 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 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) [2021-11-09 09:24:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:24:15,379 INFO L93 Difference]: Finished difference Result 1278 states and 1414 transitions. [2021-11-09 09:24:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 09:24:15,379 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 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 80 [2021-11-09 09:24:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:24:15,383 INFO L225 Difference]: With dead ends: 1278 [2021-11-09 09:24:15,383 INFO L226 Difference]: Without dead ends: 1254 [2021-11-09 09:24:15,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4460 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1081, Invalid=13925, Unknown=0, NotChecked=0, Total=15006 [2021-11-09 09:24:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-11-09 09:24:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1128. [2021-11-09 09:24:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1095 states have (on average 1.1242009132420092) internal successors, (1231), 1097 states have internal predecessors, (1231), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:24:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1261 transitions. [2021-11-09 09:24:15,396 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1261 transitions. Word has length 80 [2021-11-09 09:24:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:24:15,396 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1261 transitions. [2021-11-09 09:24:15,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 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) [2021-11-09 09:24:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1261 transitions. [2021-11-09 09:24:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 09:24:15,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:24:15,399 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 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] [2021-11-09 09:24:15,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 09:24:15,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:15,625 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:24:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:24:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1323896684, now seen corresponding path program 14 times [2021-11-09 09:24:15,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:24:15,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597071341] [2021-11-09 09:24:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:24:15,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:24:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:16,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:24:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 91 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:24:16,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:24:16,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597071341] [2021-11-09 09:24:16,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597071341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:16,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147674299] [2021-11-09 09:24:16,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:24:16,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:24:16,281 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:24:16,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 09:24:18,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:24:18,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:24:18,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-09 09:24:18,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:24:18,836 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:24:18,836 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 [2021-11-09 09:24:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 120 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:24:19,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147674299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:19,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:24:19,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-11-09 09:24:19,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186598460] [2021-11-09 09:24:19,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 09:24:19,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:24:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 09:24:19,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:24:19,879 INFO L87 Difference]: Start difference. First operand 1128 states and 1261 transitions. Second operand has 50 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 47 states have internal predecessors, (151), 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) [2021-11-09 09:24:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:24:21,509 INFO L93 Difference]: Finished difference Result 1429 states and 1566 transitions. [2021-11-09 09:24:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:24:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 47 states have internal predecessors, (151), 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 82 [2021-11-09 09:24:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:24:21,519 INFO L225 Difference]: With dead ends: 1429 [2021-11-09 09:24:21,519 INFO L226 Difference]: Without dead ends: 1388 [2021-11-09 09:24:21,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=368, Invalid=3538, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 09:24:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-11-09 09:24:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1084. [2021-11-09 09:24:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1051 states have (on average 1.1103710751665081) internal successors, (1167), 1053 states have internal predecessors, (1167), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:24:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1197 transitions. [2021-11-09 09:24:21,531 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1197 transitions. Word has length 82 [2021-11-09 09:24:21,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:24:21,531 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 1197 transitions. [2021-11-09 09:24:21,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 47 states have internal predecessors, (151), 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) [2021-11-09 09:24:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1197 transitions. [2021-11-09 09:24:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 09:24:21,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:24:21,533 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:24:21,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 09:24:21,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:21,733 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:24:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:24:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1064501632, now seen corresponding path program 19 times [2021-11-09 09:24:21,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:24:21,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471079224] [2021-11-09 09:24:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:24:21,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:24:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:22,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:24:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:24:22,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:24:22,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471079224] [2021-11-09 09:24:22,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471079224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:22,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765829291] [2021-11-09 09:24:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:24:22,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:22,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:24:22,357 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:24:22,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 09:24:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:24,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 09:24:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:24:24,977 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:24:24,977 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 [2021-11-09 09:24:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:24:26,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765829291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:26,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:24:26,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 55 [2021-11-09 09:24:26,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325531242] [2021-11-09 09:24:26,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 09:24:26,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:24:26,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 09:24:26,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2753, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:24:26,197 INFO L87 Difference]: Start difference. First operand 1084 states and 1197 transitions. Second operand has 56 states, 55 states have (on average 2.8181818181818183) internal successors, (155), 53 states have internal predecessors, (155), 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) [2021-11-09 09:24:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:24:28,010 INFO L93 Difference]: Finished difference Result 1452 states and 1589 transitions. [2021-11-09 09:24:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:24:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.8181818181818183) internal successors, (155), 53 states have internal predecessors, (155), 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 84 [2021-11-09 09:24:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:24:28,015 INFO L225 Difference]: With dead ends: 1452 [2021-11-09 09:24:28,015 INFO L226 Difference]: Without dead ends: 1452 [2021-11-09 09:24:28,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=456, Invalid=4374, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:24:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-11-09 09:24:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1096. [2021-11-09 09:24:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1063 states have (on average 1.1138287864534338) internal successors, (1184), 1065 states have internal predecessors, (1184), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:24:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1214 transitions. [2021-11-09 09:24:28,028 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1214 transitions. Word has length 84 [2021-11-09 09:24:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:24:28,029 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1214 transitions. [2021-11-09 09:24:28,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.8181818181818183) internal successors, (155), 53 states have internal predecessors, (155), 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) [2021-11-09 09:24:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1214 transitions. [2021-11-09 09:24:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 09:24:28,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:24:28,030 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 3, 3, 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] [2021-11-09 09:24:28,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 09:24:28,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-09 09:24:28,231 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:24:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:24:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash -324450157, now seen corresponding path program 15 times [2021-11-09 09:24:28,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:24:28,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156669681] [2021-11-09 09:24:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:24:28,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:24:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:24:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 36 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:24:29,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:24:29,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156669681] [2021-11-09 09:24:29,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156669681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:29,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973858574] [2021-11-09 09:24:29,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:24:29,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:29,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:24:29,807 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:24:29,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 09:24:32,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 09:24:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:24:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 09:24:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:24:32,739 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:24:32,739 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 15 treesize of output 20 [2021-11-09 09:24:33,270 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 25 treesize of output 21 [2021-11-09 09:25:00,598 INFO L354 Elim1Store]: treesize reduction 14, result has 92.5 percent of original size [2021-11-09 09:25:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 99 treesize of output 240 [2021-11-09 09:26:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 1 proven. 70 refuted. 1 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-09 09:26:04,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973858574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:26:04,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:26:04,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25] total 57 [2021-11-09 09:26:04,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484254738] [2021-11-09 09:26:04,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 09:26:04,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:26:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 09:26:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2953, Unknown=6, NotChecked=0, Total=3192 [2021-11-09 09:26:04,394 INFO L87 Difference]: Start difference. First operand 1096 states and 1214 transitions. Second operand has 57 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 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) [2021-11-09 09:26:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:26:51,493 INFO L93 Difference]: Finished difference Result 1290 states and 1416 transitions. [2021-11-09 09:26:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 09:26:51,494 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 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 84 [2021-11-09 09:26:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:26:51,499 INFO L225 Difference]: With dead ends: 1290 [2021-11-09 09:26:51,499 INFO L226 Difference]: Without dead ends: 1241 [2021-11-09 09:26:51,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=1226, Invalid=13043, Unknown=11, NotChecked=0, Total=14280 [2021-11-09 09:26:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-11-09 09:26:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1122. [2021-11-09 09:26:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1091 states have (on average 1.1173235563703026) internal successors, (1219), 1093 states have internal predecessors, (1219), 27 states have call successors, (27), 27 states have call predecessors, (27), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:26:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1247 transitions. [2021-11-09 09:26:51,513 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1247 transitions. Word has length 84 [2021-11-09 09:26:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:26:51,514 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1247 transitions. [2021-11-09 09:26:51,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 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) [2021-11-09 09:26:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1247 transitions. [2021-11-09 09:26:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 09:26:51,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:26:51,516 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 1] [2021-11-09 09:26:51,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 09:26:51,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:26:51,716 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:26:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:26:51,717 INFO L85 PathProgramCache]: Analyzing trace with hash -588317062, now seen corresponding path program 11 times [2021-11-09 09:26:51,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:26:51,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343684755] [2021-11-09 09:26:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:26:51,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:26:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:26:52,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:26:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:26:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-09 09:26:52,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:26:52,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343684755] [2021-11-09 09:26:52,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343684755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:26:52,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262278131] [2021-11-09 09:26:52,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:26:52,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:26:52,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:26:52,018 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:26:52,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 09:26:55,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 09:26:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:26:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-09 09:26:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:26:55,032 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 [2021-11-09 09:26:55,037 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 [2021-11-09 09:26:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-09 09:26:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262278131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:26:56,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:26:56,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2021-11-09 09:26:56,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800226681] [2021-11-09 09:26:56,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:26:56,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:26:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:26:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:26:56,074 INFO L87 Difference]: Start difference. First operand 1122 states and 1247 transitions. Second operand has 33 states, 32 states have (on average 3.65625) internal successors, (117), 30 states have internal predecessors, (117), 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) [2021-11-09 09:26:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:26:57,104 INFO L93 Difference]: Finished difference Result 1159 states and 1278 transitions. [2021-11-09 09:26:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:26:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.65625) internal successors, (117), 30 states have internal predecessors, (117), 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 85 [2021-11-09 09:26:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:26:57,108 INFO L225 Difference]: With dead ends: 1159 [2021-11-09 09:26:57,108 INFO L226 Difference]: Without dead ends: 1159 [2021-11-09 09:26:57,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:26:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-09 09:26:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1143. [2021-11-09 09:26:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1112 states have (on average 1.1151079136690647) internal successors, (1240), 1114 states have internal predecessors, (1240), 27 states have call successors, (27), 27 states have call predecessors, (27), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:26:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1268 transitions. [2021-11-09 09:26:57,124 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1268 transitions. Word has length 85 [2021-11-09 09:26:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:26:57,124 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 1268 transitions. [2021-11-09 09:26:57,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.65625) internal successors, (117), 30 states have internal predecessors, (117), 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) [2021-11-09 09:26:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1268 transitions. [2021-11-09 09:26:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 09:26:57,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:26:57,126 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:26:57,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 09:26:57,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-09 09:26:57,326 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:26:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:26:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash 783852921, now seen corresponding path program 20 times [2021-11-09 09:26:57,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:26:57,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719486419] [2021-11-09 09:26:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:26:57,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:26:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:27:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 105 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:27:00,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:27:00,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719486419] [2021-11-09 09:27:00,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719486419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:00,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549677023] [2021-11-09 09:27:00,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:27:00,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:00,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:27:00,383 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:27:00,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 09:27:03,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:27:03,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:27:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-09 09:27:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:27:04,500 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 53 treesize of output 49 [2021-11-09 09:27:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 33 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:27:07,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549677023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:07,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:27:07,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 76 [2021-11-09 09:27:07,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973937675] [2021-11-09 09:27:07,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 09:27:07,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:27:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 09:27:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=5180, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:27:07,598 INFO L87 Difference]: Start difference. First operand 1143 states and 1268 transitions. Second operand has 76 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 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) [2021-11-09 09:27:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:27:14,795 INFO L93 Difference]: Finished difference Result 1449 states and 1602 transitions. [2021-11-09 09:27:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 09:27:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 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 86 [2021-11-09 09:27:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:27:14,804 INFO L225 Difference]: With dead ends: 1449 [2021-11-09 09:27:14,804 INFO L226 Difference]: Without dead ends: 1423 [2021-11-09 09:27:14,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5765 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1495, Invalid=17137, Unknown=0, NotChecked=0, Total=18632 [2021-11-09 09:27:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-11-09 09:27:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1287. [2021-11-09 09:27:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1251 states have (on average 1.1223021582733812) internal successors, (1404), 1253 states have internal predecessors, (1404), 32 states have call successors, (32), 32 states have call predecessors, (32), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:27:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1437 transitions. [2021-11-09 09:27:14,816 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1437 transitions. Word has length 86 [2021-11-09 09:27:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:27:14,816 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1437 transitions. [2021-11-09 09:27:14,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 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) [2021-11-09 09:27:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1437 transitions. [2021-11-09 09:27:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 09:27:14,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:27:14,818 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 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] [2021-11-09 09:27:14,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 09:27:15,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-09 09:27:15,019 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:27:15,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:27:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1953449040, now seen corresponding path program 16 times [2021-11-09 09:27:15,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:27:15,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271475135] [2021-11-09 09:27:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:27:15,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:27:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:15,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:27:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 120 proven. 163 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:27:15,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:27:15,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271475135] [2021-11-09 09:27:15,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271475135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:15,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215260751] [2021-11-09 09:27:15,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:27:15,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:15,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:27:15,625 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:27:15,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 09:27:18,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:27:18,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:27:18,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-09 09:27:18,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:27:18,710 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:27:18,710 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 23 [2021-11-09 09:27:19,186 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 25 treesize of output 21 [2021-11-09 09:27:21,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:21,881 INFO L354 Elim1Store]: treesize reduction 48, result has 58.6 percent of original size [2021-11-09 09:27:21,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 116 treesize of output 124 [2021-11-09 09:27:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-09 09:27:22,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215260751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:22,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:27:22,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 54 [2021-11-09 09:27:22,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398557175] [2021-11-09 09:27:22,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 09:27:22,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:27:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 09:27:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2803, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:27:22,517 INFO L87 Difference]: Start difference. First operand 1287 states and 1437 transitions. Second operand has 55 states, 53 states have (on average 2.452830188679245) internal successors, (130), 52 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) [2021-11-09 09:27:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:27:33,683 INFO L93 Difference]: Finished difference Result 1691 states and 1845 transitions. [2021-11-09 09:27:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-09 09:27:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.452830188679245) internal successors, (130), 52 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 88 [2021-11-09 09:27:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:27:33,685 INFO L225 Difference]: With dead ends: 1691 [2021-11-09 09:27:33,685 INFO L226 Difference]: Without dead ends: 1627 [2021-11-09 09:27:33,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5562 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1094, Invalid=17812, Unknown=0, NotChecked=0, Total=18906 [2021-11-09 09:27:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-11-09 09:27:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1237. [2021-11-09 09:27:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1201 states have (on average 1.1099084096586178) internal successors, (1333), 1203 states have internal predecessors, (1333), 32 states have call successors, (32), 32 states have call predecessors, (32), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:27:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1366 transitions. [2021-11-09 09:27:33,698 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1366 transitions. Word has length 88 [2021-11-09 09:27:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:27:33,698 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1366 transitions. [2021-11-09 09:27:33,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.452830188679245) internal successors, (130), 52 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) [2021-11-09 09:27:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1366 transitions. [2021-11-09 09:27:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 09:27:33,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:27:33,700 INFO L513 BasicCegarLoop]: trace histogram [7, 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, 1] [2021-11-09 09:27:33,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 09:27:33,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:33,900 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:27:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:27:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1207206398, now seen corresponding path program 12 times [2021-11-09 09:27:33,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:27:33,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686292325] [2021-11-09 09:27:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:27:33,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:27:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:35,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:27:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 27 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:27:35,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:27:35,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686292325] [2021-11-09 09:27:35,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686292325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:35,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669445740] [2021-11-09 09:27:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:27:35,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:35,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:27:35,042 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:27:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 09:27:38,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:27:38,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:27:38,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-09 09:27:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:27:38,619 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 [2021-11-09 09:27:39,895 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 [2021-11-09 09:27:39,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 09:27:40,489 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-09 09:27:40,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 53 [2021-11-09 09:27:40,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:27:40,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:27:40,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:27:40,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 09:27:40,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:27:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 40 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:27:40,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669445740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:40,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:27:40,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33] total 62 [2021-11-09 09:27:40,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854083597] [2021-11-09 09:27:40,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 09:27:40,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:27:40,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 09:27:40,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3558, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:27:40,918 INFO L87 Difference]: Start difference. First operand 1237 states and 1366 transitions. Second operand has 62 states, 61 states have (on average 2.557377049180328) internal successors, (156), 59 states have internal predecessors, (156), 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) [2021-11-09 09:27:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:27:44,749 INFO L93 Difference]: Finished difference Result 1309 states and 1436 transitions. [2021-11-09 09:27:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 09:27:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.557377049180328) internal successors, (156), 59 states have internal predecessors, (156), 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 89 [2021-11-09 09:27:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:27:44,750 INFO L225 Difference]: With dead ends: 1309 [2021-11-09 09:27:44,751 INFO L226 Difference]: Without dead ends: 1255 [2021-11-09 09:27:44,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=816, Invalid=9084, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 09:27:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-11-09 09:27:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1235. [2021-11-09 09:27:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1200 states have (on average 1.1075) internal successors, (1329), 1202 states have internal predecessors, (1329), 31 states have call successors, (31), 31 states have call predecessors, (31), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:27:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1361 transitions. [2021-11-09 09:27:44,761 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1361 transitions. Word has length 89 [2021-11-09 09:27:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:27:44,761 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1361 transitions. [2021-11-09 09:27:44,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.557377049180328) internal successors, (156), 59 states have internal predecessors, (156), 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) [2021-11-09 09:27:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1361 transitions. [2021-11-09 09:27:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-09 09:27:44,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:27:44,763 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:27:44,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-09 09:27:44,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:44,964 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:27:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:27:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1945203588, now seen corresponding path program 21 times [2021-11-09 09:27:44,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:27:44,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187520567] [2021-11-09 09:27:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:27:44,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:27:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:45,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:27:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:27:45,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:27:45,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187520567] [2021-11-09 09:27:45,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187520567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:45,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68824060] [2021-11-09 09:27:45,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:27:45,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:45,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:27:45,680 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:27:45,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 09:27:49,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-09 09:27:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:27:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 09:27:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:27:49,059 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:27:49,059 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 [2021-11-09 09:27:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:27:50,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68824060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:50,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:27:50,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 60 [2021-11-09 09:27:50,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697527933] [2021-11-09 09:27:50,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 09:27:50,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:27:50,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 09:27:50,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3219, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:27:50,510 INFO L87 Difference]: Start difference. First operand 1235 states and 1361 transitions. Second operand has 61 states, 60 states have (on average 2.783333333333333) internal successors, (167), 58 states have internal predecessors, (167), 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) [2021-11-09 09:27:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:27:52,989 INFO L93 Difference]: Finished difference Result 1656 states and 1808 transitions. [2021-11-09 09:27:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:27:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.783333333333333) internal successors, (167), 58 states have internal predecessors, (167), 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 90 [2021-11-09 09:27:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:27:52,991 INFO L225 Difference]: With dead ends: 1656 [2021-11-09 09:27:52,992 INFO L226 Difference]: Without dead ends: 1656 [2021-11-09 09:27:52,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=669, Invalid=5031, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:27:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-11-09 09:27:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1247. [2021-11-09 09:27:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1212 states have (on average 1.1105610561056105) internal successors, (1346), 1214 states have internal predecessors, (1346), 31 states have call successors, (31), 31 states have call predecessors, (31), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:27:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1378 transitions. [2021-11-09 09:27:53,005 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1378 transitions. Word has length 90 [2021-11-09 09:27:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:27:53,005 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 1378 transitions. [2021-11-09 09:27:53,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.783333333333333) internal successors, (167), 58 states have internal predecessors, (167), 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) [2021-11-09 09:27:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1378 transitions. [2021-11-09 09:27:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-09 09:27:53,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:27:53,007 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 3, 3, 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] [2021-11-09 09:27:53,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-09 09:27:53,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:53,207 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:27:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:27:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1291907761, now seen corresponding path program 17 times [2021-11-09 09:27:53,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:27:53,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891036825] [2021-11-09 09:27:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:27:53,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:27:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:55,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:27:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 48 proven. 181 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:27:55,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:27:55,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891036825] [2021-11-09 09:27:55,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891036825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:55,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855769321] [2021-11-09 09:27:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:27:55,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:27:55,332 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:27:55,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 09:27:58,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-09 09:27:58,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:27:58,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-09 09:27:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:27:59,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:28:02,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:02,104 INFO L354 Elim1Store]: treesize reduction 45, result has 50.0 percent of original size [2021-11-09 09:28:02,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 89 [2021-11-09 09:28:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 200 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:28:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855769321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:02,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:28:02,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 67 [2021-11-09 09:28:02,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040386328] [2021-11-09 09:28:02,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 09:28:02,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:28:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 09:28:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=4132, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 09:28:02,201 INFO L87 Difference]: Start difference. First operand 1247 states and 1378 transitions. Second operand has 67 states, 65 states have (on average 2.230769230769231) internal successors, (145), 64 states have internal predecessors, (145), 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) [2021-11-09 09:28:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:28:10,776 INFO L93 Difference]: Finished difference Result 1337 states and 1469 transitions. [2021-11-09 09:28:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-09 09:28:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 2.230769230769231) internal successors, (145), 64 states have internal predecessors, (145), 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 90 [2021-11-09 09:28:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:28:10,778 INFO L225 Difference]: With dead ends: 1337 [2021-11-09 09:28:10,778 INFO L226 Difference]: Without dead ends: 1283 [2021-11-09 09:28:10,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6719 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1290, Invalid=19302, Unknown=0, NotChecked=0, Total=20592 [2021-11-09 09:28:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-11-09 09:28:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1231. [2021-11-09 09:28:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1199 states have (on average 1.1109257714762302) internal successors, (1332), 1201 states have internal predecessors, (1332), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:28:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1361 transitions. [2021-11-09 09:28:10,794 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1361 transitions. Word has length 90 [2021-11-09 09:28:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:28:10,795 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 1361 transitions. [2021-11-09 09:28:10,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 2.230769230769231) internal successors, (145), 64 states have internal predecessors, (145), 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) [2021-11-09 09:28:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1361 transitions. [2021-11-09 09:28:10,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-09 09:28:10,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:28:10,798 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 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] [2021-11-09 09:28:10,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-09 09:28:11,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-09 09:28:11,025 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:28:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:28:11,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1235413413, now seen corresponding path program 18 times [2021-11-09 09:28:11,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:28:11,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061878734] [2021-11-09 09:28:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:28:11,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:28:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:12,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:28:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 09:28:12,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:28:12,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061878734] [2021-11-09 09:28:12,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061878734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:12,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925078372] [2021-11-09 09:28:12,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:28:12,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:12,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:28:12,084 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:28:12,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 09:28:15,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 09:28:15,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:28:15,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 09:28:16,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:28:17,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:28:17,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:28:17,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2021-11-09 09:28:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 27 proven. 110 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 09:28:17,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925078372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:17,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:28:17,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 45 [2021-11-09 09:28:17,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194493648] [2021-11-09 09:28:17,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 09:28:17,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:28:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 09:28:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:28:17,398 INFO L87 Difference]: Start difference. First operand 1231 states and 1361 transitions. Second operand has 45 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:28:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:28:19,878 INFO L93 Difference]: Finished difference Result 1232 states and 1357 transitions. [2021-11-09 09:28:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:28:19,879 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 3 states have call successors, (5), 3 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 90 [2021-11-09 09:28:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:28:19,880 INFO L225 Difference]: With dead ends: 1232 [2021-11-09 09:28:19,880 INFO L226 Difference]: Without dead ends: 1222 [2021-11-09 09:28:19,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=656, Invalid=4894, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:28:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-11-09 09:28:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1213. [2021-11-09 09:28:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1182 states have (on average 1.1082910321489001) internal successors, (1310), 1184 states have internal predecessors, (1310), 27 states have call successors, (27), 27 states have call predecessors, (27), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:28:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1338 transitions. [2021-11-09 09:28:19,891 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1338 transitions. Word has length 90 [2021-11-09 09:28:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:28:19,891 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1338 transitions. [2021-11-09 09:28:19,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:28:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1338 transitions. [2021-11-09 09:28:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-09 09:28:19,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:28:19,893 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:28:19,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-09 09:28:20,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-09 09:28:20,094 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:28:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:28:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1537936993, now seen corresponding path program 19 times [2021-11-09 09:28:20,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:28:20,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828437734] [2021-11-09 09:28:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:28:20,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:28:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:20,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:28:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 19 proven. 96 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 09:28:20,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:28:20,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828437734] [2021-11-09 09:28:20,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828437734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:20,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214942844] [2021-11-09 09:28:20,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:28:20,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:20,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:28:20,691 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:28:20,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 09:28:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:24,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:28:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:28:25,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:28:25,352 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-09 09:28:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2021-11-09 09:28:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 32 proven. 83 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 09:28:25,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214942844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:25,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:28:25,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-11-09 09:28:25,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553149032] [2021-11-09 09:28:25,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:28:25,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:28:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:28:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:28:25,407 INFO L87 Difference]: Start difference. First operand 1213 states and 1338 transitions. Second operand has 39 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 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) [2021-11-09 09:28:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:28:26,928 INFO L93 Difference]: Finished difference Result 1205 states and 1329 transitions. [2021-11-09 09:28:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:28:26,929 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 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 90 [2021-11-09 09:28:26,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:28:26,930 INFO L225 Difference]: With dead ends: 1205 [2021-11-09 09:28:26,930 INFO L226 Difference]: Without dead ends: 1199 [2021-11-09 09:28:26,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=545, Invalid=2761, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:28:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-11-09 09:28:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2021-11-09 09:28:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1169 states have (on average 1.1086398631308811) internal successors, (1296), 1171 states have internal predecessors, (1296), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:28:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1323 transitions. [2021-11-09 09:28:26,941 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1323 transitions. Word has length 90 [2021-11-09 09:28:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:28:26,941 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 1323 transitions. [2021-11-09 09:28:26,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 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) [2021-11-09 09:28:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1323 transitions. [2021-11-09 09:28:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-09 09:28:26,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:28:26,944 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:28:26,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-09 09:28:27,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-11-09 09:28:27,144 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:28:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:28:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1029873291, now seen corresponding path program 22 times [2021-11-09 09:28:27,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:28:27,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033485823] [2021-11-09 09:28:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:28:27,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:28:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:30,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:28:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 126 proven. 318 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:28:30,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:28:30,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033485823] [2021-11-09 09:28:30,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033485823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:30,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348100615] [2021-11-09 09:28:30,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:28:30,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:30,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:28:30,391 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:28:30,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 09:28:34,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:28:34,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:28:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-09 09:28:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:28:34,217 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:28:34,217 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 23 [2021-11-09 09:28:36,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-09 09:28:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:40,026 INFO L354 Elim1Store]: treesize reduction 68, result has 52.4 percent of original size [2021-11-09 09:28:40,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 66 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 12 case distinctions, treesize of input 137 treesize of output 135 [2021-11-09 09:28:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 146 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:28:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348100615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:41,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:28:41,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 88 [2021-11-09 09:28:41,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817595039] [2021-11-09 09:28:41,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-09 09:28:41,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:28:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-09 09:28:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=7040, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 09:28:41,584 INFO L87 Difference]: Start difference. First operand 1199 states and 1323 transitions. Second operand has 88 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 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) [2021-11-09 09:28:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:28:52,202 INFO L93 Difference]: Finished difference Result 1573 states and 1733 transitions. [2021-11-09 09:28:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 09:28:52,202 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 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 92 [2021-11-09 09:28:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:28:52,204 INFO L225 Difference]: With dead ends: 1573 [2021-11-09 09:28:52,204 INFO L226 Difference]: Without dead ends: 1545 [2021-11-09 09:28:52,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7728 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2286, Invalid=21894, Unknown=0, NotChecked=0, Total=24180 [2021-11-09 09:28:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-11-09 09:28:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1353. [2021-11-09 09:28:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1318 states have (on average 1.1160849772382397) internal successors, (1471), 1320 states have internal predecessors, (1471), 31 states have call successors, (31), 31 states have call predecessors, (31), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:28:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1503 transitions. [2021-11-09 09:28:52,224 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1503 transitions. Word has length 92 [2021-11-09 09:28:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:28:52,224 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 1503 transitions. [2021-11-09 09:28:52,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 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) [2021-11-09 09:28:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1503 transitions. [2021-11-09 09:28:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 09:28:52,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:28:52,228 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 1] [2021-11-09 09:28:52,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-09 09:28:52,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:52,451 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:28:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:28:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1364440095, now seen corresponding path program 13 times [2021-11-09 09:28:52,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:28:52,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106968454] [2021-11-09 09:28:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:28:52,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:28:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:53,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:28:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 12 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:28:53,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:28:53,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106968454] [2021-11-09 09:28:53,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106968454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:53,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108659146] [2021-11-09 09:28:53,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:28:53,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:53,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:28:53,577 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:28:53,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 09:28:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-09 09:28:57,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:28:57,303 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 [2021-11-09 09:28:58,098 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 [2021-11-09 09:28:58,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-09 09:28:58,637 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-09 09:28:58,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 47 [2021-11-09 09:28:58,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-09 09:28:58,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-09 09:28:59,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-09 09:28:59,344 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 09:28:59,345 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 [2021-11-09 09:28:59,485 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-09 09:28:59,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2021-11-09 09:28:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-09 09:28:59,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108659146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:59,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:28:59,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26] total 60 [2021-11-09 09:28:59,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638410079] [2021-11-09 09:28:59,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 09:28:59,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:28:59,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 09:28:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:28:59,496 INFO L87 Difference]: Start difference. First operand 1353 states and 1503 transitions. Second operand has 60 states, 59 states have (on average 2.457627118644068) internal successors, (145), 57 states have internal predecessors, (145), 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) [2021-11-09 09:29:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:02,160 INFO L93 Difference]: Finished difference Result 1863 states and 2077 transitions. [2021-11-09 09:29:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:29:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.457627118644068) internal successors, (145), 57 states have internal predecessors, (145), 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 93 [2021-11-09 09:29:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:02,162 INFO L225 Difference]: With dead ends: 1863 [2021-11-09 09:29:02,162 INFO L226 Difference]: Without dead ends: 1643 [2021-11-09 09:29:02,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=364, Invalid=6776, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 09:29:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-09 09:29:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1579. [2021-11-09 09:29:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1538 states have (on average 1.1196358907672301) internal successors, (1722), 1540 states have internal predecessors, (1722), 37 states have call successors, (37), 37 states have call predecessors, (37), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:29:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1760 transitions. [2021-11-09 09:29:02,178 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1760 transitions. Word has length 93 [2021-11-09 09:29:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:02,179 INFO L470 AbstractCegarLoop]: Abstraction has 1579 states and 1760 transitions. [2021-11-09 09:29:02,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.457627118644068) internal successors, (145), 57 states have internal predecessors, (145), 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) [2021-11-09 09:29:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1760 transitions. [2021-11-09 09:29:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 09:29:02,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:02,182 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 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] [2021-11-09 09:29:02,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-09 09:29:02,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:02,396 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:29:02,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:02,396 INFO L85 PathProgramCache]: Analyzing trace with hash -21251380, now seen corresponding path program 20 times [2021-11-09 09:29:02,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:02,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531419327] [2021-11-09 09:29:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:02,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:03,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:29:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 153 proven. 191 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:29:03,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:03,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531419327] [2021-11-09 09:29:03,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531419327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:03,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420441527] [2021-11-09 09:29:03,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:29:03,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:03,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:03,053 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:03,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 09:29:06,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:29:06,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:06,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 09:29:06,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:06,945 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:29:06,945 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 [2021-11-09 09:29:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 190 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:29:08,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420441527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:08,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:08,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-11-09 09:29:08,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101239206] [2021-11-09 09:29:08,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 09:29:08,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 09:29:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2974, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:29:08,408 INFO L87 Difference]: Start difference. First operand 1579 states and 1760 transitions. Second operand has 58 states, 57 states have (on average 3.0701754385964914) internal successors, (175), 55 states have internal predecessors, (175), 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) [2021-11-09 09:29:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:10,336 INFO L93 Difference]: Finished difference Result 1991 states and 2178 transitions. [2021-11-09 09:29:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:29:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.0701754385964914) internal successors, (175), 55 states have internal predecessors, (175), 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 94 [2021-11-09 09:29:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:10,339 INFO L225 Difference]: With dead ends: 1991 [2021-11-09 09:29:10,339 INFO L226 Difference]: Without dead ends: 1942 [2021-11-09 09:29:10,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=469, Invalid=4787, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:29:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-11-09 09:29:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1501. [2021-11-09 09:29:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1460 states have (on average 1.106849315068493) internal successors, (1616), 1462 states have internal predecessors, (1616), 37 states have call successors, (37), 37 states have call predecessors, (37), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:29:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 1654 transitions. [2021-11-09 09:29:10,372 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 1654 transitions. Word has length 94 [2021-11-09 09:29:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:10,372 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 1654 transitions. [2021-11-09 09:29:10,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.0701754385964914) internal successors, (175), 55 states have internal predecessors, (175), 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) [2021-11-09 09:29:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 1654 transitions. [2021-11-09 09:29:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 09:29:10,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:10,377 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:29:10,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-09 09:29:10,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:10,593 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:29:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1784461880, now seen corresponding path program 23 times [2021-11-09 09:29:10,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:10,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721735357] [2021-11-09 09:29:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:10,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:11,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:29:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:29:11,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:11,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721735357] [2021-11-09 09:29:11,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721735357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:11,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666110342] [2021-11-09 09:29:11,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:29:11,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:11,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:11,330 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:11,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 09:29:15,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-09 09:29:15,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-09 09:29:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:15,665 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:29:15,666 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 [2021-11-09 09:29:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:29:16,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666110342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:16,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:16,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 47 [2021-11-09 09:29:16,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597059568] [2021-11-09 09:29:16,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 09:29:16,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 09:29:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:29:16,752 INFO L87 Difference]: Start difference. First operand 1501 states and 1654 transitions. Second operand has 48 states, 47 states have (on average 2.74468085106383) internal successors, (129), 46 states have internal predecessors, (129), 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) [2021-11-09 09:29:19,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:19,410 INFO L93 Difference]: Finished difference Result 1988 states and 2171 transitions. [2021-11-09 09:29:19,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:29:19,410 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.74468085106383) internal successors, (129), 46 states have internal predecessors, (129), 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 96 [2021-11-09 09:29:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:19,413 INFO L225 Difference]: With dead ends: 1988 [2021-11-09 09:29:19,413 INFO L226 Difference]: Without dead ends: 1988 [2021-11-09 09:29:19,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=320, Invalid=3712, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:29:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-11-09 09:29:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1515. [2021-11-09 09:29:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1474 states have (on average 1.1099050203527816) internal successors, (1636), 1476 states have internal predecessors, (1636), 37 states have call successors, (37), 37 states have call predecessors, (37), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:29:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1674 transitions. [2021-11-09 09:29:19,434 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1674 transitions. Word has length 96 [2021-11-09 09:29:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:19,434 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 1674 transitions. [2021-11-09 09:29:19,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.74468085106383) internal successors, (129), 46 states have internal predecessors, (129), 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) [2021-11-09 09:29:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1674 transitions. [2021-11-09 09:29:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 09:29:19,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:19,437 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 3, 3, 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] [2021-11-09 09:29:19,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-09 09:29:19,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:19,638 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:29:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash -277396277, now seen corresponding path program 21 times [2021-11-09 09:29:19,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:19,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562419141] [2021-11-09 09:29:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:19,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:22,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:29:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 62 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:29:22,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:22,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562419141] [2021-11-09 09:29:22,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562419141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:22,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214904707] [2021-11-09 09:29:22,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:29:22,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:22,189 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:22,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 09:29:26,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:29:26,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-09 09:29:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:26,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:26,484 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:29:26,484 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-09 09:29:27,586 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 25 treesize of output 21 [2021-11-09 09:29:30,090 INFO L354 Elim1Store]: treesize reduction 78, result has 76.3 percent of original size [2021-11-09 09:29:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 105 treesize of output 313 [2021-11-09 09:29:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 37 proven. 106 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-09 09:29:32,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214904707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:32,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:32,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32] total 70 [2021-11-09 09:29:32,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140106126] [2021-11-09 09:29:32,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-09 09:29:32,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:32,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-09 09:29:32,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=4524, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:29:32,062 INFO L87 Difference]: Start difference. First operand 1515 states and 1674 transitions. Second operand has 70 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 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) [2021-11-09 09:29:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:47,386 INFO L93 Difference]: Finished difference Result 1856 states and 2027 transitions. [2021-11-09 09:29:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-09 09:29:47,387 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 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 96 [2021-11-09 09:29:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:47,390 INFO L225 Difference]: With dead ends: 1856 [2021-11-09 09:29:47,390 INFO L226 Difference]: Without dead ends: 1821 [2021-11-09 09:29:47,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8563 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=2117, Invalid=23965, Unknown=0, NotChecked=0, Total=26082 [2021-11-09 09:29:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-11-09 09:29:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1591. [2021-11-09 09:29:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1551 states have (on average 1.112830431979368) internal successors, (1726), 1553 states have internal predecessors, (1726), 36 states have call successors, (36), 36 states have call predecessors, (36), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:29:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 1763 transitions. [2021-11-09 09:29:47,415 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 1763 transitions. Word has length 96 [2021-11-09 09:29:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:47,415 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 1763 transitions. [2021-11-09 09:29:47,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 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) [2021-11-09 09:29:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 1763 transitions. [2021-11-09 09:29:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 09:29:47,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:47,419 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 5, 5, 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] [2021-11-09 09:29:47,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-09 09:29:47,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:47,633 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting cstrcatErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:29:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -111399465, now seen corresponding path program 22 times [2021-11-09 09:29:47,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:47,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917151689] [2021-11-09 09:29:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:47,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:49,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:29:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 158 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 09:29:49,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:49,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917151689] [2021-11-09 09:29:49,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917151689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:49,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678378973] [2021-11-09 09:29:49,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:29:49,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:49,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:49,021 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:49,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-09 09:29:53,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:29:53,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-09 09:29:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:53,184 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:29:53,184 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 15 treesize of output 20 [2021-11-09 09:29:53,206 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 [2021-11-09 09:29:54,569 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 27 treesize of output 23 [2021-11-09 09:29:55,598 INFO L354 Elim1Store]: treesize reduction 84, result has 28.2 percent of original size [2021-11-09 09:29:55,599 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 76 treesize of output 79 [2021-11-09 09:29:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 31 proven. 153 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 09:29:56,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678378973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:56,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:56,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 58 [2021-11-09 09:29:56,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418512568] [2021-11-09 09:29:56,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 09:29:56,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 09:29:56,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3063, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:29:56,346 INFO L87 Difference]: Start difference. First operand 1591 states and 1763 transitions. Second operand has 58 states, 56 states have (on average 2.6785714285714284) internal successors, (150), 55 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) [2021-11-09 09:30:10,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:10,008 INFO L93 Difference]: Finished difference Result 1596 states and 1760 transitions. [2021-11-09 09:30:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-09 09:30:10,009 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 2.6785714285714284) internal successors, (150), 55 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 96 [2021-11-09 09:30:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:10,011 INFO L225 Difference]: With dead ends: 1596 [2021-11-09 09:30:10,011 INFO L226 Difference]: Without dead ends: 1572 [2021-11-09 09:30:10,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8781 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2041, Invalid=26015, Unknown=0, NotChecked=0, Total=28056 [2021-11-09 09:30:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-11-09 09:30:10,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1549. [2021-11-09 09:30:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1511 states have (on average 1.1091992058239577) internal successors, (1676), 1513 states have internal predecessors, (1676), 34 states have call successors, (34), 34 states have call predecessors, (34), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:30:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 1711 transitions. [2021-11-09 09:30:10,025 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 1711 transitions. Word has length 96 [2021-11-09 09:30:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:10,025 INFO L470 AbstractCegarLoop]: Abstraction has 1549 states and 1711 transitions. [2021-11-09 09:30:10,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 2.6785714285714284) internal successors, (150), 55 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) [2021-11-09 09:30:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 1711 transitions. [2021-11-09 09:30:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:30:10,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:10,028 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 1] [2021-11-09 09:30:10,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-09 09:30:10,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:10,229 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting cstrcatErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:30:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:10,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1622966012, now seen corresponding path program 14 times [2021-11-09 09:30:10,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:10,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975191791] [2021-11-09 09:30:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:10,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:10,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:30:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-09 09:30:10,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:10,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975191791] [2021-11-09 09:30:10,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975191791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:10,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828933220] [2021-11-09 09:30:10,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:30:10,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:10,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:10,634 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:10,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-09 09:30:14,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:30:14,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:30:14,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 09:30:14,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:30:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-09 09:30:15,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828933220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:15,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:30:15,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 31 [2021-11-09 09:30:15,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828855356] [2021-11-09 09:30:15,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:30:15,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:30:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:30:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:30:15,405 INFO L87 Difference]: Start difference. First operand 1549 states and 1711 transitions. Second operand has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 29 states have internal predecessors, (109), 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) [2021-11-09 09:30:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:16,487 INFO L93 Difference]: Finished difference Result 1593 states and 1748 transitions. [2021-11-09 09:30:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:30:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 29 states have internal predecessors, (109), 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 97 [2021-11-09 09:30:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:16,491 INFO L225 Difference]: With dead ends: 1593 [2021-11-09 09:30:16,492 INFO L226 Difference]: Without dead ends: 1593 [2021-11-09 09:30:16,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:30:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-11-09 09:30:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1574. [2021-11-09 09:30:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1536 states have (on average 1.107421875) internal successors, (1701), 1538 states have internal predecessors, (1701), 34 states have call successors, (34), 34 states have call predecessors, (34), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:30:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 1736 transitions. [2021-11-09 09:30:16,513 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 1736 transitions. Word has length 97 [2021-11-09 09:30:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:16,514 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 1736 transitions. [2021-11-09 09:30:16,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 29 states have internal predecessors, (109), 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) [2021-11-09 09:30:16,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 1736 transitions. [2021-11-09 09:30:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:30:16,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:16,517 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:30:16,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-09 09:30:16,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:16,733 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting cstrcatErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-09 09:30:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1175916593, now seen corresponding path program 24 times [2021-11-09 09:30:16,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:16,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515816656] [2021-11-09 09:30:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:16,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:20,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:30:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 149 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:30:20,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:20,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515816656] [2021-11-09 09:30:20,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515816656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:20,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623313211] [2021-11-09 09:30:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:30:20,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:20,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:20,538 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:20,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c82f5024-3d61-4a46-bcfd-3d2cf1aa1eb1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process