./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:10:55,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:10:55,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:10:55,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:10:55,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:10:55,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:10:55,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:10:55,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:10:55,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:10:55,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:10:55,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:10:55,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:10:55,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:10:55,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:10:55,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:10:55,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:10:55,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:10:55,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:10:55,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:10:55,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:10:55,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:10:55,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:10:55,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:10:55,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:10:55,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:10:55,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:10:55,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:10:55,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:10:55,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:10:55,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:10:55,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:10:55,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:10:55,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:10:55,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:10:55,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:10:55,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:10:55,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:10:55,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:10:55,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:10:55,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:10:55,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:10:55,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:10:55,281 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:10:55,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:10:55,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:10:55,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:10:55,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:10:55,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:10:55,283 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:10:55,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:10:55,284 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:10:55,284 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:10:55,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:10:55,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:10:55,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:10:55,285 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:10:55,285 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:10:55,285 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:10:55,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:10:55,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:10:55,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:10:55,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:10:55,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:10:55,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:10:55,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:10:55,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:10:55,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:10:55,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:10:55,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:10:55,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:10:55,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:10:55,288 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_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2021-10-21 19:10:55,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:10:55,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:10:55,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:10:55,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:10:55,609 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:10:55,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-21 19:10:55,703 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/data/2e92fd0f1/9988e107f1944a2ebcdc384c928abe13/FLAGa9c9faf91 [2021-10-21 19:10:56,218 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:10:56,218 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-10-21 19:10:56,231 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/data/2e92fd0f1/9988e107f1944a2ebcdc384c928abe13/FLAGa9c9faf91 [2021-10-21 19:10:56,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/data/2e92fd0f1/9988e107f1944a2ebcdc384c928abe13 [2021-10-21 19:10:56,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:10:56,648 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:10:56,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:10:56,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:10:56,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:10:56,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:10:56" (1/1) ... [2021-10-21 19:10:56,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63279abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:56, skipping insertion in model container [2021-10-21 19:10:56,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:10:56" (1/1) ... [2021-10-21 19:10:56,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:10:56,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:10:57,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:10:57,012 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:10:57,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:10:57,082 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:10:57,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57 WrapperNode [2021-10-21 19:10:57,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:10:57,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:10:57,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:10:57,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:10:57,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (1/1) ... [2021-10-21 19:10:57,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (1/1) ... [2021-10-21 19:10:57,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (1/1) ... [2021-10-21 19:10:57,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (1/1) ... [2021-10-21 19:10:57,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (1/1) ... [2021-10-21 19:10:57,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (1/1) ... [2021-10-21 19:10:57,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (1/1) ... [2021-10-21 19:10:57,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:10:57,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:10:57,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:10:57,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:10:57,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (1/1) ... [2021-10-21 19:10:57,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:10:57,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:57,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:10:57,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:10:57,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:10:57,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:10:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:10:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:10:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:10:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:10:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:10:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2021-10-21 19:10:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:10:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:10:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:10:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:10:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:10:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:10:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:10:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:10:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:10:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:10:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:10:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:10:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:10:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:10:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:10:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:10:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:10:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:10:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:10:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:10:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:10:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:10:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:10:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:10:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:10:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:10:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:10:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:10:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:10:57,253 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:10:57,253 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:10:57,253 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:10:57,253 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:10:57,253 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:10:57,253 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:10:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:10:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:10:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:10:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:10:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:10:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:10:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:10:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:10:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:10:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:10:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:10:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:10:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:10:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:10:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:10:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:10:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:10:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:10:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:10:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:10:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:10:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:10:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:10:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:10:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:10:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:10:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:10:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:10:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:10:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:10:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:10:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:10:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:10:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:10:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:10:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:10:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:10:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:10:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:10:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:10:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:10:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:10:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:10:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:10:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:10:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:10:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:10:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:10:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:10:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:10:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:10:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:10:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:10:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:10:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:10:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:10:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:10:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:10:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:10:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:10:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:10:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:10:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:10:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:10:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:10:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:10:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:10:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:10:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:10:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:10:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:10:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:10:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:10:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:10:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-21 19:10:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2021-10-21 19:10:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:10:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:10:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:10:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:10:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:10:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:10:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:10:57,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:10:57,627 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:10:57,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:10:57 BoogieIcfgContainer [2021-10-21 19:10:57,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:10:57,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:10:57,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:10:57,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:10:57,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:10:56" (1/3) ... [2021-10-21 19:10:57,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8aed53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:10:57, skipping insertion in model container [2021-10-21 19:10:57,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:57" (2/3) ... [2021-10-21 19:10:57,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8aed53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:10:57, skipping insertion in model container [2021-10-21 19:10:57,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:10:57" (3/3) ... [2021-10-21 19:10:57,653 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-10-21 19:10:57,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:10:57,659 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-21 19:10:57,725 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:10:57,732 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:10:57,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-21 19:10:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:10:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:10:57,769 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:57,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:57,772 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:10:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341813, now seen corresponding path program 1 times [2021-10-21 19:10:57,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:57,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056186877] [2021-10-21 19:10:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:57,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:58,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:58,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056186877] [2021-10-21 19:10:58,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056186877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:58,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:58,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:10:58,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302066433] [2021-10-21 19:10:58,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:58,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:58,106 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 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 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:58,269 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-21 19:10:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:58,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-10-21 19:10:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:58,279 INFO L225 Difference]: With dead ends: 30 [2021-10-21 19:10:58,279 INFO L226 Difference]: Without dead ends: 27 [2021-10-21 19:10:58,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-21 19:10:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-21 19:10:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:10:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-21 19:10:58,314 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-10-21 19:10:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:58,315 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-21 19:10:58,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-21 19:10:58,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:10:58,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:58,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:58,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:10:58,317 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:10:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:58,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341814, now seen corresponding path program 1 times [2021-10-21 19:10:58,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:58,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827609854] [2021-10-21 19:10:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:58,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:58,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:58,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827609854] [2021-10-21 19:10:58,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827609854] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:58,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:58,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:58,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234869554] [2021-10-21 19:10:58,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:10:58,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:10:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:58,485 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:58,547 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-21 19:10:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:10:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 10 [2021-10-21 19:10:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:58,548 INFO L225 Difference]: With dead ends: 26 [2021-10-21 19:10:58,548 INFO L226 Difference]: Without dead ends: 26 [2021-10-21 19:10:58,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:10:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-21 19:10:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-21 19:10:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:10:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-21 19:10:58,553 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2021-10-21 19:10:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:58,554 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-21 19:10:58,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-21 19:10:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:10:58,555 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:58,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:58,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:10:58,556 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:10:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:58,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341867, now seen corresponding path program 1 times [2021-10-21 19:10:58,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:58,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487355245] [2021-10-21 19:10:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:58,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:58,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:58,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487355245] [2021-10-21 19:10:58,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487355245] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:58,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:58,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:10:58,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515900359] [2021-10-21 19:10:58,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:10:58,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:58,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:10:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:58,625 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:58,683 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-21 19:10:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:10:58,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 10 [2021-10-21 19:10:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:58,686 INFO L225 Difference]: With dead ends: 33 [2021-10-21 19:10:58,686 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:10:58,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:10:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:10:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-21 19:10:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:10:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-21 19:10:58,695 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2021-10-21 19:10:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:58,696 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 19:10:58,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-21 19:10:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:10:58,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:58,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:58,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:10:58,697 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:10:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1480401449, now seen corresponding path program 1 times [2021-10-21 19:10:58,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:58,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468400503] [2021-10-21 19:10:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:58,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:58,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:58,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468400503] [2021-10-21 19:10:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468400503] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:58,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:58,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:10:58,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37125382] [2021-10-21 19:10:58,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:10:58,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:58,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:10:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:10:58,792 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:58,873 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-21 19:10:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:10:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 10 [2021-10-21 19:10:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:58,875 INFO L225 Difference]: With dead ends: 37 [2021-10-21 19:10:58,875 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 19:10:58,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:10:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 19:10:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-21 19:10:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:10:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-21 19:10:58,880 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 10 [2021-10-21 19:10:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:58,881 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-21 19:10:58,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-21 19:10:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:10:58,883 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:58,884 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:58,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:10:58,886 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrlenErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:10:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash 138789715, now seen corresponding path program 1 times [2021-10-21 19:10:58,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:58,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864860690] [2021-10-21 19:10:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:58,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:58,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:59,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:59,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864860690] [2021-10-21 19:10:59,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864860690] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:59,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:59,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:10:59,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504600850] [2021-10-21 19:10:59,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:10:59,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:10:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:10:59,007 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:59,104 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-10-21 19:10:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:10:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2021-10-21 19:10:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:59,108 INFO L225 Difference]: With dead ends: 29 [2021-10-21 19:10:59,108 INFO L226 Difference]: Without dead ends: 29 [2021-10-21 19:10:59,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:10:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-21 19:10:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-21 19:10:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:10:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-10-21 19:10:59,119 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2021-10-21 19:10:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:59,119 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-10-21 19:10:59,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-10-21 19:10:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:10:59,121 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:59,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:59,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:10:59,122 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:10:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:59,122 INFO L82 PathProgramCache]: Analyzing trace with hash 138789716, now seen corresponding path program 1 times [2021-10-21 19:10:59,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:59,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594302622] [2021-10-21 19:10:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:59,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:59,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:59,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:59,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594302622] [2021-10-21 19:10:59,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594302622] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:59,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:59,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:10:59,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882614492] [2021-10-21 19:10:59,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:10:59,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:59,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:10:59,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:10:59,261 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:59,401 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-10-21 19:10:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:10:59,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 13 [2021-10-21 19:10:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:59,408 INFO L225 Difference]: With dead ends: 34 [2021-10-21 19:10:59,408 INFO L226 Difference]: Without dead ends: 34 [2021-10-21 19:10:59,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:10:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-21 19:10:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-21 19:10:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:10:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-21 19:10:59,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2021-10-21 19:10:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:59,422 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-21 19:10:59,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-21 19:10:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:10:59,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:59,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:59,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:10:59,425 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:10:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash 232930637, now seen corresponding path program 1 times [2021-10-21 19:10:59,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:59,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519206089] [2021-10-21 19:10:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:59,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:59,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:59,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:59,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519206089] [2021-10-21 19:10:59,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519206089] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:59,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:59,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:10:59,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048203830] [2021-10-21 19:10:59,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:10:59,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:59,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:10:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:10:59,637 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:59,818 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-21 19:10:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:10:59,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 15 [2021-10-21 19:10:59,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:59,820 INFO L225 Difference]: With dead ends: 41 [2021-10-21 19:10:59,820 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 19:10:59,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:10:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 19:10:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-10-21 19:10:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:10:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-21 19:10:59,840 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2021-10-21 19:10:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:59,841 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-21 19:10:59,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-21 19:10:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:10:59,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:59,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:59,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:10:59,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:10:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:59,844 INFO L82 PathProgramCache]: Analyzing trace with hash 912989007, now seen corresponding path program 1 times [2021-10-21 19:10:59,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:59,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975727284] [2021-10-21 19:10:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:59,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:00,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:00,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:00,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975727284] [2021-10-21 19:11:00,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975727284] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:00,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:00,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:11:00,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790737220] [2021-10-21 19:11:00,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:11:00,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:11:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:11:00,089 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:00,282 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-10-21 19:11:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:11:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 15 [2021-10-21 19:11:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:00,286 INFO L225 Difference]: With dead ends: 51 [2021-10-21 19:11:00,286 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 19:11:00,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:11:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 19:11:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-10-21 19:11:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:11:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-21 19:11:00,304 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2021-10-21 19:11:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:00,304 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-21 19:11:00,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-21 19:11:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:11:00,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:00,306 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:00,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:11:00,306 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:00,307 INFO L82 PathProgramCache]: Analyzing trace with hash -754029460, now seen corresponding path program 1 times [2021-10-21 19:11:00,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:00,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119662847] [2021-10-21 19:11:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:00,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:00,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:00,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:00,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119662847] [2021-10-21 19:11:00,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119662847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:00,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245805930] [2021-10-21 19:11:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:00,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:00,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:00,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:00,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:11:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:00,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:11:00,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:00,608 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:11:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:00,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245805930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:00,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:00,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 19:11:00,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781524335] [2021-10-21 19:11:00,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:11:00,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:00,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:11:00,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:00,776 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:00,870 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-21 19:11:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:11:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 14 [2021-10-21 19:11:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:00,872 INFO L225 Difference]: With dead ends: 42 [2021-10-21 19:11:00,882 INFO L226 Difference]: Without dead ends: 42 [2021-10-21 19:11:00,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:11:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-21 19:11:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-10-21 19:11:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:11:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-21 19:11:00,888 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2021-10-21 19:11:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:00,888 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-21 19:11:00,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-21 19:11:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:11:00,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:00,890 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:00,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:01,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:01,112 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1444358493, now seen corresponding path program 1 times [2021-10-21 19:11:01,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:01,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861549439] [2021-10-21 19:11:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:01,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:01,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:01,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:11:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:01,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:01,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861549439] [2021-10-21 19:11:01,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861549439] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:01,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:01,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:11:01,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400017727] [2021-10-21 19:11:01,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:11:01,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:11:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:01,183 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:11:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:01,219 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-21 19:11:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:11:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 19 [2021-10-21 19:11:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:01,220 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:11:01,220 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 19:11:01,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 19:11:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-21 19:11:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-21 19:11:01,223 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2021-10-21 19:11:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:01,223 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-21 19:11:01,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:11:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-21 19:11:01,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:11:01,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:01,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:01,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:11:01,227 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:01,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1892891924, now seen corresponding path program 1 times [2021-10-21 19:11:01,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:01,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577287359] [2021-10-21 19:11:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:01,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:01,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:01,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:01,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577287359] [2021-10-21 19:11:01,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577287359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:01,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086641313] [2021-10-21 19:11:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:01,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:01,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:01,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:01,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:11:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:11:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:01,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086641313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:01,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:01,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-21 19:11:01,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048595852] [2021-10-21 19:11:01,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:11:01,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:11:01,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:11:01,680 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:01,836 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-10-21 19:11:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:11:01,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (5), 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 19 [2021-10-21 19:11:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:01,837 INFO L225 Difference]: With dead ends: 26 [2021-10-21 19:11:01,838 INFO L226 Difference]: Without dead ends: 26 [2021-10-21 19:11:01,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:11:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-21 19:11:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-10-21 19:11:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-21 19:11:01,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-10-21 19:11:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:01,841 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-21 19:11:01,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-21 19:11:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:11:01,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:01,842 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:01,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:02,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:11:02,064 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1996994277, now seen corresponding path program 2 times [2021-10-21 19:11:02,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:02,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32686113] [2021-10-21 19:11:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:02,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:02,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:02,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:02,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32686113] [2021-10-21 19:11:02,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32686113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:02,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908586166] [2021-10-21 19:11:02,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:02,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:02,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:02,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:11:02,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:02,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:02,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:11:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:02,597 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 [2021-10-21 19:11:03,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:11:03,040 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 33 [2021-10-21 19:11:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:03,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908586166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:03,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:03,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-10-21 19:11:03,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743695972] [2021-10-21 19:11:03,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:11:03,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:03,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:11:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:11:03,165 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:04,034 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-10-21 19:11:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:11:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 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 21 [2021-10-21 19:11:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:04,036 INFO L225 Difference]: With dead ends: 39 [2021-10-21 19:11:04,036 INFO L226 Difference]: Without dead ends: 32 [2021-10-21 19:11:04,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 925.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:11:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-21 19:11:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-10-21 19:11:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-21 19:11:04,039 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-10-21 19:11:04,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:04,040 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-21 19:11:04,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-21 19:11:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:11:04,041 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:04,041 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:04,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:04,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:04,264 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:04,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1847085883, now seen corresponding path program 3 times [2021-10-21 19:11:04,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:04,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399813925] [2021-10-21 19:11:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:04,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:04,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:04,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:04,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399813925] [2021-10-21 19:11:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399813925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:04,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389217293] [2021-10-21 19:11:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:11:04,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:04,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:04,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:11:04,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:11:04,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:04,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:11:04,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:04,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:11:04,951 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 [2021-10-21 19:11:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:04,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389217293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:04,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:04,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-10-21 19:11:04,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700096195] [2021-10-21 19:11:04,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:11:04,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:04,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:11:04,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:11:04,957 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:05,331 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-10-21 19:11:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:11:05,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 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 27 [2021-10-21 19:11:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:05,332 INFO L225 Difference]: With dead ends: 44 [2021-10-21 19:11:05,332 INFO L226 Difference]: Without dead ends: 35 [2021-10-21 19:11:05,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:11:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-21 19:11:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-10-21 19:11:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-21 19:11:05,335 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-10-21 19:11:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:05,336 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-21 19:11:05,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-21 19:11:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:11:05,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:05,337 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:05,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:05,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:11:05,537 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:05,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1827827544, now seen corresponding path program 4 times [2021-10-21 19:11:05,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:05,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652614903] [2021-10-21 19:11:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:05,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:05,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:05,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:05,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652614903] [2021-10-21 19:11:05,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652614903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:05,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481259503] [2021-10-21 19:11:05,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:11:05,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:05,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:05,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:05,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:11:05,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:11:05,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:05,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 19:11:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:05,932 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:11:06,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 19:11:06,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:11:06,394 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 19 treesize of output 19 [2021-10-21 19:11:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:06,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481259503] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:06,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:06,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-10-21 19:11:06,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710021217] [2021-10-21 19:11:06,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:11:06,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:06,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:11:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:11:06,486 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 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) [2021-10-21 19:11:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:07,051 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-10-21 19:11:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:11:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 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 31 [2021-10-21 19:11:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:07,053 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:11:07,053 INFO L226 Difference]: Without dead ends: 35 [2021-10-21 19:11:07,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:11:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-21 19:11:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-10-21 19:11:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-21 19:11:07,056 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-10-21 19:11:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:07,056 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-21 19:11:07,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 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) [2021-10-21 19:11:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-21 19:11:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:11:07,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:07,058 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:07,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:07,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:11:07,268 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash -99354543, now seen corresponding path program 5 times [2021-10-21 19:11:07,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:07,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096221023] [2021-10-21 19:11:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:07,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:07,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:07,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096221023] [2021-10-21 19:11:07,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096221023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:07,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145087170] [2021-10-21 19:11:07,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:11:07,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:07,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:07,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:07,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:11:07,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-21 19:11:07,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:07,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 19:11:07,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:07,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:11:08,126 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 [2021-10-21 19:11:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:08,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145087170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:08,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:08,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-10-21 19:11:08,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480090300] [2021-10-21 19:11:08,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:11:08,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:11:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:11:08,135 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:08,562 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-21 19:11:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:11:08,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 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 33 [2021-10-21 19:11:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:08,563 INFO L225 Difference]: With dead ends: 52 [2021-10-21 19:11:08,563 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 19:11:08,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:11:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 19:11:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-10-21 19:11:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-21 19:11:08,567 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-10-21 19:11:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-21 19:11:08,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-21 19:11:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:11:08,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:08,568 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:08,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-21 19:11:08,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:11:08,784 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:08,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1272435374, now seen corresponding path program 6 times [2021-10-21 19:11:08,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:08,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401640882] [2021-10-21 19:11:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:08,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:09,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:09,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:09,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401640882] [2021-10-21 19:11:09,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401640882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:09,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987714804] [2021-10-21 19:11:09,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:11:09,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:09,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:09,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:09,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:11:09,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 19:11:09,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:09,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:11:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:09,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987714804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:09,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:09,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-21 19:11:09,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969129811] [2021-10-21 19:11:09,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:11:09,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:09,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:11:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:11:09,566 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:09,903 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-10-21 19:11:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:11:09,904 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-10-21 19:11:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:09,905 INFO L225 Difference]: With dead ends: 41 [2021-10-21 19:11:09,905 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 19:11:09,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:11:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 19:11:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-10-21 19:11:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-21 19:11:09,908 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2021-10-21 19:11:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:09,908 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-21 19:11:09,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-21 19:11:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:11:09,909 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:09,910 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:09,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:10,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:11:10,110 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:10,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1255285209, now seen corresponding path program 7 times [2021-10-21 19:11:10,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:10,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050066186] [2021-10-21 19:11:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:10,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:10,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:10,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050066186] [2021-10-21 19:11:10,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050066186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:10,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7347939] [2021-10-21 19:11:10,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:11:10,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:10,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:10,386 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:10,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:11:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 19:11:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:10,782 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 [2021-10-21 19:11:11,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:11:11,566 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 33 [2021-10-21 19:11:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:11,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7347939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:11,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:11,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-10-21 19:11:11,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404839476] [2021-10-21 19:11:11,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:11:11,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:11:11,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:11:11,702 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:13,708 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-10-21 19:11:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:11:13,708 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-10-21 19:11:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:13,709 INFO L225 Difference]: With dead ends: 63 [2021-10-21 19:11:13,709 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:11:13,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1519.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 19:11:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:11:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-10-21 19:11:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-10-21 19:11:13,714 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2021-10-21 19:11:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:13,714 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-10-21 19:11:13,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-10-21 19:11:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:11:13,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:13,716 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:13,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:13,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:11:13,940 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:13,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:13,941 INFO L82 PathProgramCache]: Analyzing trace with hash 592780477, now seen corresponding path program 8 times [2021-10-21 19:11:13,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:13,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66859065] [2021-10-21 19:11:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:13,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:14,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:14,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:14,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66859065] [2021-10-21 19:11:14,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66859065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:14,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802480624] [2021-10-21 19:11:14,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:14,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:14,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:14,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:14,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:11:14,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:14,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:14,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-21 19:11:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:14,747 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 [2021-10-21 19:11:15,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:11:15,621 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 33 [2021-10-21 19:11:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:15,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802480624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:15,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:15,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-10-21 19:11:15,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6348082] [2021-10-21 19:11:15,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-21 19:11:15,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-21 19:11:15,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:11:15,765 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 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) [2021-10-21 19:11:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:18,871 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-10-21 19:11:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:11:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 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 45 [2021-10-21 19:11:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:18,874 INFO L225 Difference]: With dead ends: 71 [2021-10-21 19:11:18,874 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 19:11:18,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1721.9ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-10-21 19:11:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 19:11:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-21 19:11:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-21 19:11:18,885 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2021-10-21 19:11:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:18,886 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-21 19:11:18,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 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) [2021-10-21 19:11:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-21 19:11:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:11:18,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:18,887 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:18,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:19,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:19,104 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-10-21 19:11:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1607150573, now seen corresponding path program 9 times [2021-10-21 19:11:19,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:19,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008312839] [2021-10-21 19:11:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:19,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:19,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:19,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:19,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008312839] [2021-10-21 19:11:19,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008312839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:19,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900054813] [2021-10-21 19:11:19,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:11:19,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:19,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:19,466 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:19,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:11:19,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-21 19:11:19,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:11:19,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:19,749 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:11:19,944 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 [2021-10-21 19:11:20,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:11:20,279 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 26 treesize of output 26 [2021-10-21 19:11:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-10-21 19:11:20,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900054813] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:20,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:20,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 28 [2021-10-21 19:11:20,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439358139] [2021-10-21 19:11:20,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:11:20,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:20,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:11:20,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:11:20,396 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:22,247 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-10-21 19:11:22,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-21 19:11:22,248 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-21 19:11:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:22,248 INFO L225 Difference]: With dead ends: 75 [2021-10-21 19:11:22,248 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:11:22,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1740.8ms TimeCoverageRelationStatistics Valid=345, Invalid=3077, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 19:11:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:11:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:11:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:11:22,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-10-21 19:11:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:22,250 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:11:22,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:11:22,250 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:11:22,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:11:22,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:11:22,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:11:22,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:11:22,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:11:22,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr0REQUIRES_VIOLATION [2021-10-21 19:11:22,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr1REQUIRES_VIOLATION [2021-10-21 19:11:22,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:22,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:22,457 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:11:22,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:11:22 BoogieIcfgContainer [2021-10-21 19:11:22,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:11:22,474 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:11:22,474 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:11:22,475 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:11:22,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:10:57" (3/4) ... [2021-10-21 19:11:22,480 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:11:22,487 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:11:22,487 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 19:11:22,488 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 19:11:22,488 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-21 19:11:22,488 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-21 19:11:22,488 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2021-10-21 19:11:22,488 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:11:22,489 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-21 19:11:22,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-21 19:11:22,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-21 19:11:22,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:11:22,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:11:22,522 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:11:22,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:11:22,523 INFO L168 Benchmark]: Toolchain (without parser) took 25874.95 ms. Allocated memory was 100.7 MB in the beginning and 184.5 MB in the end (delta: 83.9 MB). Free memory was 59.5 MB in the beginning and 127.3 MB in the end (delta: -67.8 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:22,524 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 100.7 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:11:22,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.56 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 70.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:22,525 INFO L168 Benchmark]: Boogie Preprocessor took 82.25 ms. Allocated memory is still 100.7 MB. Free memory was 70.7 MB in the beginning and 68.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:22,525 INFO L168 Benchmark]: RCFGBuilder took 460.04 ms. Allocated memory is still 100.7 MB. Free memory was 68.1 MB in the beginning and 50.1 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:22,526 INFO L168 Benchmark]: TraceAbstraction took 24843.30 ms. Allocated memory was 100.7 MB in the beginning and 184.5 MB in the end (delta: 83.9 MB). Free memory was 49.7 MB in the beginning and 130.3 MB in the end (delta: -80.6 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:22,526 INFO L168 Benchmark]: Witness Printer took 48.49 ms. Allocated memory is still 184.5 MB. Free memory was 130.3 MB in the beginning and 127.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:22,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 100.7 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 429.56 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 70.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 82.25 ms. Allocated memory is still 100.7 MB. Free memory was 70.7 MB in the beginning and 68.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 460.04 ms. Allocated memory is still 100.7 MB. Free memory was 68.1 MB in the beginning and 50.1 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24843.30 ms. Allocated memory was 100.7 MB in the beginning and 184.5 MB in the end (delta: 83.9 MB). Free memory was 49.7 MB in the beginning and 130.3 MB in the end (delta: -80.6 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Witness Printer took 48.49 ms. Allocated memory is still 184.5 MB. Free memory was 130.3 MB in the beginning and 127.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 47 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 24733.9ms, OverallIterations: 19, TraceHistogramMax: 7, EmptinessCheckTime: 34.6ms, AutomataDifference: 10908.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 284 SDtfs, 741 SDslu, 1424 SDs, 0 SdLazy, 5181 SolverSat, 265 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5024.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 8696.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=18, InterpolantAutomatonStates: 246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 114.8ms AutomataMinimizationTime, 19 MinimizatonAttempts, 62 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 132.3ms SsaConstructionTime, 529.4ms SatisfiabilityAnalysisTime, 8923.9ms InterpolantComputationTime, 749 NumberOfCodeBlocks, 745 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 720 ConstructedInterpolants, 52 QuantifiedInterpolants, 5638 SizeOfPredicates, 76 NumberOfNonLiveVariables, 1365 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 212/746 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:11:22,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567609b1-d3f4-4c16-8345-0d12b27581e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...