./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.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_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/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_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/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_a1153600-9f48-4729-8c83-c93167bff187/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 ce305d75684696e5fabb4c8d08830bbd90a67b7669f979309850a29850c4f917 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:48:56,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:48:56,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:48:56,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:48:56,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:48:56,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:48:56,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:48:56,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:48:56,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:48:56,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:48:56,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:48:56,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:48:56,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:48:56,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:48:56,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:48:56,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:48:56,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:48:56,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:48:56,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:48:56,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:48:56,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:48:56,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:48:56,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:48:56,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:48:56,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:48:56,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:48:56,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:48:56,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:48:56,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:48:56,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:48:56,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:48:56,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:48:56,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:48:56,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:48:56,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:48:56,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:48:56,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:48:56,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:48:56,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:48:56,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:48:56,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:48:56,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:48:56,192 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:48:56,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:48:56,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:48:56,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:48:56,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:48:56,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:48:56,207 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:48:56,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:48:56,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:48:56,208 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:48:56,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:48:56,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:48:56,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:48:56,210 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:48:56,210 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:48:56,211 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:48:56,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:48:56,211 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:48:56,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:48:56,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:48:56,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:48:56,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:48:56,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:48:56,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:48:56,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:48:56,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:48:56,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:48:56,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:48:56,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:48:56,218 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_a1153600-9f48-4729-8c83-c93167bff187/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce305d75684696e5fabb4c8d08830bbd90a67b7669f979309850a29850c4f917 [2021-10-21 19:48:56,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:48:56,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:48:56,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:48:56,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:48:56,619 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:48:56,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-10-21 19:48:56,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/data/651abe97e/48cf6be3c0944f5e97dcba10c5aee866/FLAGd17a847f2 [2021-10-21 19:48:57,476 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:48:57,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-10-21 19:48:57,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/data/651abe97e/48cf6be3c0944f5e97dcba10c5aee866/FLAGd17a847f2 [2021-10-21 19:48:57,647 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/data/651abe97e/48cf6be3c0944f5e97dcba10c5aee866 [2021-10-21 19:48:57,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:48:57,656 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:48:57,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:48:57,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:48:57,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:48:57,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:48:57" (1/1) ... [2021-10-21 19:48:57,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701bc974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:57, skipping insertion in model container [2021-10-21 19:48:57,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:48:57" (1/1) ... [2021-10-21 19:48:57,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:48:57,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:48:58,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:48:58,234 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:48:58,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:48:58,340 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:48:58,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58 WrapperNode [2021-10-21 19:48:58,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:48:58,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:48:58,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:48:58,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:48:58,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (1/1) ... [2021-10-21 19:48:58,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (1/1) ... [2021-10-21 19:48:58,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (1/1) ... [2021-10-21 19:48:58,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (1/1) ... [2021-10-21 19:48:58,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (1/1) ... [2021-10-21 19:48:58,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (1/1) ... [2021-10-21 19:48:58,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (1/1) ... [2021-10-21 19:48:58,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:48:58,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:48:58,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:48:58,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:48:58,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (1/1) ... [2021-10-21 19:48:58,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:48:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:48:58,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:48:58,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:48:58,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:48:58,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:48:58,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:48:58,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:48:58,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:48:58,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:48:58,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:48:58,567 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2021-10-21 19:48:58,567 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-10-21 19:48:58,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:48:58,567 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:48:58,568 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:48:58,568 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:48:58,568 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:48:58,568 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:48:58,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:48:58,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:48:58,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:48:58,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:48:58,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:48:58,570 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:48:58,570 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:48:58,570 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:48:58,570 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:48:58,571 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:48:58,571 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:48:58,571 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:48:58,571 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:48:58,571 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:48:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:48:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:48:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:48:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:48:58,573 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:48:58,573 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:48:58,573 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:48:58,573 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:48:58,573 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:48:58,574 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:48:58,574 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:48:58,574 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:48:58,574 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:48:58,574 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:48:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:48:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:48:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:48:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:48:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:48:58,576 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:48:58,576 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:48:58,576 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:48:58,576 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:48:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:48:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:48:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:48:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:48:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:48:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:48:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:48:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:48:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:48:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:48:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:48:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:48:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:48:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:48:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:48:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:48:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:48:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:48:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:48:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:48:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:48:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:48:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:48:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:48:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:48:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:48:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:48:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:48:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:48:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:48:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:48:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:48:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:48:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:48:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:48:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:48:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:48:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:48:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:48:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:48:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:48:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:48:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:48:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:48:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:48:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:48:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:48:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:48:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:48:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:48:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:48:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:48:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:48:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:48:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:48:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:48:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:48:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:48:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:48:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:48:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:48:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:48:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:48:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:48:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:48:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:48:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-21 19:48:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2021-10-21 19:48:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:48:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:48:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-10-21 19:48:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:48:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:48:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:48:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:48:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:48:59,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:48:59,294 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 19:48:59,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:48:59 BoogieIcfgContainer [2021-10-21 19:48:59,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:48:59,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:48:59,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:48:59,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:48:59,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:48:57" (1/3) ... [2021-10-21 19:48:59,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4181fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:48:59, skipping insertion in model container [2021-10-21 19:48:59,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:48:58" (2/3) ... [2021-10-21 19:48:59,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4181fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:48:59, skipping insertion in model container [2021-10-21 19:48:59,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:48:59" (3/3) ... [2021-10-21 19:48:59,313 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2021-10-21 19:48:59,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:48:59,321 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-10-21 19:48:59,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:48:59,410 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 19:48:59,412 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-21 19:48:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 40 states have (on average 1.8) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:48:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:48:59,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:59,445 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:48:59,446 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting build_nondet_StringErr2REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:48:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1361999972, now seen corresponding path program 1 times [2021-10-21 19:48:59,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:59,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284697326] [2021-10-21 19:48:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:59,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:59,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:59,807 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 19:48:59,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:59,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284697326] [2021-10-21 19:48:59,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284697326] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:59,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:59,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:48:59,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756148082] [2021-10-21 19:48:59,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:48:59,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:48:59,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:48:59,861 INFO L87 Difference]: Start difference. First operand has 73 states, 40 states have (on average 1.8) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (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 19:49:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:00,143 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-10-21 19:49:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:49:00,147 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, (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 11 [2021-10-21 19:49:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:00,163 INFO L225 Difference]: With dead ends: 71 [2021-10-21 19:49:00,164 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 19:49:00,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:49:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 19:49:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-21 19:49:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-10-21 19:49:00,231 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 11 [2021-10-21 19:49:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:00,232 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-10-21 19:49:00,232 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, (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 19:49:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-10-21 19:49:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:49:00,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:00,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:00,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:49:00,235 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting build_nondet_StringErr3REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1361999971, now seen corresponding path program 1 times [2021-10-21 19:49:00,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:00,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515904907] [2021-10-21 19:49:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:00,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:00,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:00,456 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 19:49:00,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:00,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515904907] [2021-10-21 19:49:00,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515904907] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:49:00,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:49:00,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:49:00,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849266897] [2021-10-21 19:49:00,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:49:00,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:00,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:49:00,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:49:00,465 INFO L87 Difference]: Start difference. First operand 68 states and 74 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, (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 19:49:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:00,655 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-10-21 19:49:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:49:00,656 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, (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 11 [2021-10-21 19:49:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:00,664 INFO L225 Difference]: With dead ends: 67 [2021-10-21 19:49:00,664 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 19:49:00,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:49:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 19:49:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-21 19:49:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.641025641025641) internal successors, (64), 58 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-10-21 19:49:00,698 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 11 [2021-10-21 19:49:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:00,699 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-10-21 19:49:00,699 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, (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 19:49:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-10-21 19:49:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:49:00,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:00,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:00,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:49:00,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1361999918, now seen corresponding path program 1 times [2021-10-21 19:49:00,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:00,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301858942] [2021-10-21 19:49:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:00,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:00,821 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 19:49:00,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:00,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301858942] [2021-10-21 19:49:00,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301858942] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:49:00,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:49:00,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:49:00,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330157074] [2021-10-21 19:49:00,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:49:00,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:49:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:49:00,825 INFO L87 Difference]: Start difference. First operand 67 states and 73 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, (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 19:49:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:01,008 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-21 19:49:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:49:01,008 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, (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 11 [2021-10-21 19:49:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:01,014 INFO L225 Difference]: With dead ends: 73 [2021-10-21 19:49:01,014 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 19:49:01,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:49:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 19:49:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2021-10-21 19:49:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 60 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-10-21 19:49:01,043 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 11 [2021-10-21 19:49:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:01,045 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-10-21 19:49:01,045 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, (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 19:49:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-10-21 19:49:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:49:01,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:01,046 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:01,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:49:01,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1361940336, now seen corresponding path program 1 times [2021-10-21 19:49:01,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:01,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609838535] [2021-10-21 19:49:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:01,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,210 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 19:49:01,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:01,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609838535] [2021-10-21 19:49:01,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609838535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:49:01,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:49:01,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:49:01,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229587239] [2021-10-21 19:49:01,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:49:01,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:49:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:49:01,224 INFO L87 Difference]: Start difference. First operand 69 states and 75 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, (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 19:49:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:01,440 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-10-21 19:49:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:49:01,441 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, (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 11 [2021-10-21 19:49:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:01,445 INFO L225 Difference]: With dead ends: 77 [2021-10-21 19:49:01,445 INFO L226 Difference]: Without dead ends: 77 [2021-10-21 19:49:01,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:49:01,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-21 19:49:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-21 19:49:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 62 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-10-21 19:49:01,475 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 11 [2021-10-21 19:49:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:01,475 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-10-21 19:49:01,476 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, (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 19:49:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-10-21 19:49:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:49:01,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:01,478 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:01,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:49:01,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:01,481 INFO L82 PathProgramCache]: Analyzing trace with hash 670453331, now seen corresponding path program 1 times [2021-10-21 19:49:01,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:01,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171115286] [2021-10-21 19:49:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:01,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,647 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 19:49:01,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:01,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171115286] [2021-10-21 19:49:01,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171115286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:01,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270605962] [2021-10-21 19:49:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:01,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:01,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:01,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:01,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:49:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:49:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:01,953 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 19:49:02,149 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 19:49:02,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270605962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:02,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:02,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 19:49:02,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128707955] [2021-10-21 19:49:02,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:49:02,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:49:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:49:02,153 INFO L87 Difference]: Start difference. First operand 71 states and 78 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:49:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:02,441 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-10-21 19:49:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:49:02,442 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 19:49:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:02,443 INFO L225 Difference]: With dead ends: 76 [2021-10-21 19:49:02,443 INFO L226 Difference]: Without dead ends: 76 [2021-10-21 19:49:02,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:49:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-21 19:49:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-10-21 19:49:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-10-21 19:49:02,450 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 15 [2021-10-21 19:49:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:02,450 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-10-21 19:49:02,450 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:49:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-10-21 19:49:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:49:02,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:02,452 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:02,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:02,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:02,653 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash 140003118, now seen corresponding path program 1 times [2021-10-21 19:49:02,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:02,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323859959] [2021-10-21 19:49:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:02,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:02,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:02,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:49:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:02,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:49:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:49:03,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:03,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323859959] [2021-10-21 19:49:03,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323859959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:03,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917198194] [2021-10-21 19:49:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:03,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:03,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:03,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:03,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:49:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:03,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:49:03,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:03,238 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 19:49:03,489 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:49:03,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-21 19:49:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:49:03,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917198194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:03,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:03,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-10-21 19:49:03,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399670373] [2021-10-21 19:49:03,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:49:03,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:03,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:49:03,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:49:03,746 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:49:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:04,410 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-10-21 19:49:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:49:04,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-10-21 19:49:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:04,412 INFO L225 Difference]: With dead ends: 65 [2021-10-21 19:49:04,412 INFO L226 Difference]: Without dead ends: 65 [2021-10-21 19:49:04,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:49:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-21 19:49:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-21 19:49:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 56 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-21 19:49:04,418 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 28 [2021-10-21 19:49:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:04,418 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-21 19:49:04,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:49:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-21 19:49:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:49:04,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:04,420 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:04,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:04,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 19:49:04,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:04,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:04,639 INFO L82 PathProgramCache]: Analyzing trace with hash 140003119, now seen corresponding path program 1 times [2021-10-21 19:49:04,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:04,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906389227] [2021-10-21 19:49:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:04,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:04,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:04,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:49:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:04,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:49:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:49:05,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:05,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906389227] [2021-10-21 19:49:05,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906389227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:05,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222990817] [2021-10-21 19:49:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:05,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:05,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:05,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:49:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:49:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:05,327 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 19:49:05,334 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 10 treesize of output 9 [2021-10-21 19:49:05,735 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:49:05,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-21 19:49:05,744 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:49:05,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-21 19:49:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:49:05,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222990817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:05,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:05,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 17 [2021-10-21 19:49:05,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475523113] [2021-10-21 19:49:05,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:49:05,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:49:05,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:49:05,800 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:49:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:06,585 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2021-10-21 19:49:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:49:06,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-10-21 19:49:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:06,590 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:49:06,590 INFO L226 Difference]: Without dead ends: 90 [2021-10-21 19:49:06,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 533.7ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:49:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-21 19:49:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2021-10-21 19:49:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 58 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-10-21 19:49:06,603 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 28 [2021-10-21 19:49:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:06,604 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-10-21 19:49:06,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:49:06,604 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-10-21 19:49:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:49:06,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:06,607 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:06,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:06,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:49:06,825 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrpbrkErr4REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:06,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:06,826 INFO L82 PathProgramCache]: Analyzing trace with hash 124645684, now seen corresponding path program 1 times [2021-10-21 19:49:06,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:06,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354669083] [2021-10-21 19:49:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:06,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:06,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:06,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:49:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:06,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:49:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:49:06,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:06,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354669083] [2021-10-21 19:49:06,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354669083] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:49:06,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:49:06,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:49:06,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397077279] [2021-10-21 19:49:06,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:49:06,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:06,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:49:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:49:06,984 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:49:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:07,420 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-10-21 19:49:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:49:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-10-21 19:49:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:07,422 INFO L225 Difference]: With dead ends: 67 [2021-10-21 19:49:07,423 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 19:49:07,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:49:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 19:49:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-10-21 19:49:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 55 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-10-21 19:49:07,429 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 32 [2021-10-21 19:49:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:07,430 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-10-21 19:49:07,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:49:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-10-21 19:49:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:49:07,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:07,432 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:07,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:49:07,432 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash 124645685, now seen corresponding path program 1 times [2021-10-21 19:49:07,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:07,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306030242] [2021-10-21 19:49:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:07,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:49:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:49:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:49:07,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:07,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306030242] [2021-10-21 19:49:07,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306030242] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:49:07,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:49:07,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 19:49:07,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143978898] [2021-10-21 19:49:07,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:49:07,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:07,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:49:07,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:49:07,716 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:49:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:08,542 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2021-10-21 19:49:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:49:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-10-21 19:49:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:08,545 INFO L225 Difference]: With dead ends: 125 [2021-10-21 19:49:08,545 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 19:49:08,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:49:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 19:49:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2021-10-21 19:49:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.4125) internal successors, (113), 91 states have internal predecessors, (113), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-21 19:49:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2021-10-21 19:49:08,566 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 32 [2021-10-21 19:49:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2021-10-21 19:49:08,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:49:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2021-10-21 19:49:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:49:08,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:08,578 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:08,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:49:08,578 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:08,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1155217993, now seen corresponding path program 1 times [2021-10-21 19:49:08,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:08,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813365857] [2021-10-21 19:49:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:08,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:08,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:08,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:49:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:08,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:49:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:49:08,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:08,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813365857] [2021-10-21 19:49:08,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813365857] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:49:08,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:49:08,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-21 19:49:08,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343252410] [2021-10-21 19:49:08,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:49:08,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:49:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:49:08,967 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:49:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:09,658 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2021-10-21 19:49:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:49:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-10-21 19:49:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:09,660 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:49:09,660 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:49:09,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:49:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:49:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 70. [2021-10-21 19:49:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 61 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:49:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-10-21 19:49:09,665 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 32 [2021-10-21 19:49:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:09,666 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-10-21 19:49:09,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:49:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-10-21 19:49:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:49:09,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:09,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:09,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:49:09,669 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-21 19:49:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:09,669 INFO L82 PathProgramCache]: Analyzing trace with hash -431506202, now seen corresponding path program 1 times [2021-10-21 19:49:09,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:09,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241922076] [2021-10-21 19:49:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:09,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:49:09,688 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:49:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:49:09,731 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:49:09,732 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:49:09,733 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:49:09,736 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr0REQUIRES_VIOLATION [2021-10-21 19:49:09,736 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr1REQUIRES_VIOLATION [2021-10-21 19:49:09,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr2REQUIRES_VIOLATION [2021-10-21 19:49:09,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr3REQUIRES_VIOLATION [2021-10-21 19:49:09,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr0REQUIRES_VIOLATION [2021-10-21 19:49:09,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr1REQUIRES_VIOLATION [2021-10-21 19:49:09,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr2REQUIRES_VIOLATION [2021-10-21 19:49:09,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr3REQUIRES_VIOLATION [2021-10-21 19:49:09,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr4REQUIRES_VIOLATION [2021-10-21 19:49:09,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr5REQUIRES_VIOLATION [2021-10-21 19:49:09,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr6REQUIRES_VIOLATION [2021-10-21 19:49:09,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr7REQUIRES_VIOLATION [2021-10-21 19:49:09,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr8REQUIRES_VIOLATION [2021-10-21 19:49:09,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr9REQUIRES_VIOLATION [2021-10-21 19:49:09,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:49:09,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:49:09,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:49:09,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:49:09,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:49:09,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:49:09,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:49:09,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:49:09,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:49:09,751 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:49:09,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:49:09 BoogieIcfgContainer [2021-10-21 19:49:09,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:49:09,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:49:09,791 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:49:09,792 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:49:09,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:48:59" (3/4) ... [2021-10-21 19:49:09,795 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:49:09,894 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:49:09,894 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:49:09,896 INFO L168 Benchmark]: Toolchain (without parser) took 12238.65 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 92.6 MB in the beginning and 54.0 MB in the end (delta: 38.6 MB). Peak memory consumption was 64.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:49:09,896 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 130.0 MB. Free memory was 101.0 MB in the beginning and 101.0 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:49:09,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 680.53 ms. Allocated memory is still 130.0 MB. Free memory was 92.6 MB in the beginning and 96.2 MB in the end (delta: -3.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:49:09,898 INFO L168 Benchmark]: Boogie Preprocessor took 118.61 ms. Allocated memory is still 130.0 MB. Free memory was 96.2 MB in the beginning and 93.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:49:09,899 INFO L168 Benchmark]: RCFGBuilder took 835.04 ms. Allocated memory is still 130.0 MB. Free memory was 93.8 MB in the beginning and 73.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:49:09,900 INFO L168 Benchmark]: TraceAbstraction took 10490.61 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 72.7 MB in the beginning and 56.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:49:09,900 INFO L168 Benchmark]: Witness Printer took 102.67 ms. Allocated memory is still 157.3 MB. Free memory was 56.1 MB in the beginning and 54.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:49:09,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 130.0 MB. Free memory was 101.0 MB in the beginning and 101.0 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 680.53 ms. Allocated memory is still 130.0 MB. Free memory was 92.6 MB in the beginning and 96.2 MB in the end (delta: -3.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 118.61 ms. Allocated memory is still 130.0 MB. Free memory was 96.2 MB in the beginning and 93.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 835.04 ms. Allocated memory is still 130.0 MB. Free memory was 93.8 MB in the beginning and 73.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10490.61 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 72.7 MB in the beginning and 56.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. * Witness Printer took 102.67 ms. Allocated memory is still 157.3 MB. Free memory was 56.1 MB in the beginning and 54.0 MB in the end (delta: 2.1 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 - CounterExampleResult [Line: 548]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L546] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-1:0}] [L527] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-1:0}] [L528] return nondetString; VAL [\result={-1:0}, i=0, length=1, nondetString={-1:0}] [L546] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L546] char* s1 = build_nondet_String(); [L547] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-2:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-2:0}] [L527] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-2:0}] [L528] return nondetString; VAL [\result={-2:0}, i=0, length=1, nondetString={-2:0}] [L547] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-2:0}, s1={-1:0}] [L547] char* s2 = build_nondet_String(); [L548] CALL cstrpbrk(s1,s2) VAL [s1={-1:0}, s2={-2:0}] [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 VAL [s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L535] EXPR \read(*sc1) VAL [\read(*sc1)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; VAL [\result={0:0}, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L548] RET cstrpbrk(s1,s2) VAL [cstrpbrk(s1,s2)={0:0}, s1={-1:0}, s2={-2:0}] - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 88 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 10350.5ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 34.4ms, AutomataDifference: 4676.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 486 SDtfs, 1284 SDslu, 1068 SDs, 0 SdLazy, 2992 SolverSat, 134 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 2655.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2050.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=9, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 182.1ms AutomataMinimizationTime, 10 MinimizatonAttempts, 120 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.8ms SsaConstructionTime, 329.2ms SatisfiabilityAnalysisTime, 3619.8ms InterpolantComputationTime, 315 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 269 ConstructedInterpolants, 14 QuantifiedInterpolants, 1647 SizeOfPredicates, 14 NumberOfNonLiveVariables, 339 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 38/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:49:09,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1153600-9f48-4729-8c83-c93167bff187/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...