./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD --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 1fa4bda6bd30ba2cdf5e016e12b6593fa4b1ef45b4dc13eb01e28da7c534ab67 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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-b2eff8b [2021-10-28 23:00:57,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:00:57,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:00:57,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:00:57,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:00:57,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:00:57,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:00:57,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:00:57,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:00:57,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:00:57,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:00:57,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:00:57,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:00:57,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:00:57,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:00:57,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:00:57,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:00:57,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:00:57,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:00:57,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:00:57,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:00:57,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:00:57,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:00:57,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:00:57,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:00:57,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:00:57,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:00:57,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:00:57,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:00:57,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:00:57,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:00:57,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:00:57,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:00:57,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:00:57,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:00:57,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:00:57,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:00:57,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:00:57,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:00:57,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:00:57,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:00:57,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:00:57,632 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:00:57,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:00:57,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:00:57,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:00:57,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:00:57,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:00:57,640 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:00:57,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:00:57,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:00:57,641 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:00:57,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:00:57,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:00:57,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:00:57,642 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:00:57,643 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:00:57,643 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:00:57,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:00:57,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:00:57,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:00:57,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:00:57,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:00:57,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:00:57,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:00:57,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:00:57,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:00:57,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:00:57,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:00:57,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:00:57,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:00:57,648 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_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fa4bda6bd30ba2cdf5e016e12b6593fa4b1ef45b4dc13eb01e28da7c534ab67 [2021-10-28 23:00:57,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:00:57,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:00:57,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:00:57,973 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:00:57,974 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:00:57,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2021-10-28 23:00:58,050 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/data/25c99c5cd/7f81ff962f3e4694a98e399a94abe61d/FLAG5bc465870 [2021-10-28 23:00:58,579 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:00:58,580 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2021-10-28 23:00:58,592 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/data/25c99c5cd/7f81ff962f3e4694a98e399a94abe61d/FLAG5bc465870 [2021-10-28 23:00:58,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/data/25c99c5cd/7f81ff962f3e4694a98e399a94abe61d [2021-10-28 23:00:58,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:00:58,855 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:00:58,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:00:58,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:00:58,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:00:58,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:00:58" (1/1) ... [2021-10-28 23:00:58,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d7f12cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:58, skipping insertion in model container [2021-10-28 23:00:58,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:00:58" (1/1) ... [2021-10-28 23:00:58,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:00:58,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:00:59,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:00:59,315 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:00:59,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:00:59,379 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:00:59,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59 WrapperNode [2021-10-28 23:00:59,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:00:59,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:00:59,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:00:59,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:00:59,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (1/1) ... [2021-10-28 23:00:59,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (1/1) ... [2021-10-28 23:00:59,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (1/1) ... [2021-10-28 23:00:59,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (1/1) ... [2021-10-28 23:00:59,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (1/1) ... [2021-10-28 23:00:59,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (1/1) ... [2021-10-28 23:00:59,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (1/1) ... [2021-10-28 23:00:59,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:00:59,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:00:59,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:00:59,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:00:59,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (1/1) ... [2021-10-28 23:00:59,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:00:59,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:00:59,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:00:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:00:59,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:00:59,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:00:59,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:00:59,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:00:59,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 23:00:59,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 23:00:59,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 23:00:59,554 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2021-10-28 23:00:59,555 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2021-10-28 23:00:59,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:00:59,555 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:00:59,556 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:00:59,556 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:00:59,556 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:00:59,556 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:00:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:00:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:00:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:00:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:00:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:00:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:00:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:00:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:00:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:00:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:00:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:00:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:00:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:00:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 23:00:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 23:00:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 23:00:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:00:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:00:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:00:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:00:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:00:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:00:59,561 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:00:59,561 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:00:59,561 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:00:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:00:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:00:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:00:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:00:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:00:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:00:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:00:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:00:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:00:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:00:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:00:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:00:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:00:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:00:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:00:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:00:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:00:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:00:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:00:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:00:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:00:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:00:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:00:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:00:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:00:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:00:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:00:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:00:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:00:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:00:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:00:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:00:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:00:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:00:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:00:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:00:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:00:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2021-10-28 23:00:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:00:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:00:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:00:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:00:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:00:59,993 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:00:59,994 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 23:00:59,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:00:59 BoogieIcfgContainer [2021-10-28 23:00:59,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:00:59,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:00:59,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:01:00,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:01:00,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:00:58" (1/3) ... [2021-10-28 23:01:00,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e76c3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:01:00, skipping insertion in model container [2021-10-28 23:01:00,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:59" (2/3) ... [2021-10-28 23:01:00,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e76c3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:01:00, skipping insertion in model container [2021-10-28 23:01:00,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:00:59" (3/3) ... [2021-10-28 23:01:00,006 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe.i [2021-10-28 23:01:00,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:01:00,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-28 23:01:00,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:01:00,063 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 [2021-10-28 23:01:00,064 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-28 23:01:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 24 states have (on average 1.625) internal successors, (39), 34 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:01:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:01:00,088 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:00,088 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:00,089 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting build_nondet_StringErr2REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1978316378, now seen corresponding path program 1 times [2021-10-28 23:01:00,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:00,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249230852] [2021-10-28 23:01:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:00,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:00,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:00,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:00,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249230852] [2021-10-28 23:01:00,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249230852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:01:00,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:01:00,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:01:00,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628573909] [2021-10-28 23:01:00,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:01:00,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:01:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:01:00,359 INFO L87 Difference]: Start difference. First operand has 43 states, 24 states have (on average 1.625) internal successors, (39), 34 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2021-10-28 23:01:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:00,515 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-28 23:01:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:01:00,516 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 [2021-10-28 23:01:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:00,524 INFO L225 Difference]: With dead ends: 41 [2021-10-28 23:01:00,524 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 23:01:00,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:01:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 23:01:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-28 23:01:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.434782608695652) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:01:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-10-28 23:01:00,646 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 11 [2021-10-28 23:01:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:00,647 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-10-28 23:01:00,647 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) [2021-10-28 23:01:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-10-28 23:01:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:01:00,648 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:00,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:01:00,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting build_nondet_StringErr3REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1978316379, now seen corresponding path program 1 times [2021-10-28 23:01:00,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:00,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981872635] [2021-10-28 23:01:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:00,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:00,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:00,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:00,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981872635] [2021-10-28 23:01:00,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981872635] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:01:00,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:01:00,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:01:00,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232578766] [2021-10-28 23:01:00,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:01:00,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:01:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:01:00,821 INFO L87 Difference]: Start difference. First operand 38 states and 40 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) [2021-10-28 23:01:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:00,925 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-10-28 23:01:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:01:00,925 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 [2021-10-28 23:01:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:00,928 INFO L225 Difference]: With dead ends: 37 [2021-10-28 23:01:00,929 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 23:01:00,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:01:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 23:01:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-28 23:01:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.391304347826087) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:01:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-10-28 23:01:00,939 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2021-10-28 23:01:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:00,940 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-10-28 23:01:00,940 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) [2021-10-28 23:01:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-10-28 23:01:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:01:00,941 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:00,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:00,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:01:00,942 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1978316432, now seen corresponding path program 1 times [2021-10-28 23:01:00,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:00,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669627990] [2021-10-28 23:01:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:00,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:01,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:01,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:01,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669627990] [2021-10-28 23:01:01,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669627990] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:01:01,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:01:01,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:01:01,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623342686] [2021-10-28 23:01:01,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:01:01,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:01,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:01:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:01:01,064 INFO L87 Difference]: Start difference. First operand 37 states and 39 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) [2021-10-28 23:01:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:01,150 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-10-28 23:01:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:01:01,151 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 [2021-10-28 23:01:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:01,156 INFO L225 Difference]: With dead ends: 43 [2021-10-28 23:01:01,157 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 23:01:01,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:01:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 23:01:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-10-28 23:01:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.36) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:01:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-10-28 23:01:01,176 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2021-10-28 23:01:01,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:01,176 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-10-28 23:01:01,177 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) [2021-10-28 23:01:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-10-28 23:01:01,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:01:01,178 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:01,178 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:01,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:01:01,179 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1978376014, now seen corresponding path program 1 times [2021-10-28 23:01:01,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:01,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967483296] [2021-10-28 23:01:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:01,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:01,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:01,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:01,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967483296] [2021-10-28 23:01:01,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967483296] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:01:01,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:01:01,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:01:01,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291261576] [2021-10-28 23:01:01,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:01:01,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:01,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:01:01,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:01:01,270 INFO L87 Difference]: Start difference. First operand 39 states and 41 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) [2021-10-28 23:01:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:01,354 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-10-28 23:01:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:01:01,354 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 [2021-10-28 23:01:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:01,355 INFO L225 Difference]: With dead ends: 47 [2021-10-28 23:01:01,355 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 23:01:01,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:01:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 23:01:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-10-28 23:01:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 33 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:01:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-28 23:01:01,361 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 11 [2021-10-28 23:01:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:01,361 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-28 23:01:01,362 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) [2021-10-28 23:01:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-28 23:01:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:01:01,363 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:01,363 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:01,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:01:01,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1295904273, now seen corresponding path program 1 times [2021-10-28 23:01:01,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:01,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230064661] [2021-10-28 23:01:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:01,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:01,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:01,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:01,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230064661] [2021-10-28 23:01:01,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230064661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:01:01,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520846627] [2021-10-28 23:01:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:01,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:01:01,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:01:01,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:01:01,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:01:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:01:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:01:01,717 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 [2021-10-28 23:01:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:01,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520846627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:01:01,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:01:01,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 23:01:01,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667302757] [2021-10-28 23:01:01,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:01:01,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:01:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:01:01,853 INFO L87 Difference]: Start difference. First operand 41 states and 44 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) [2021-10-28 23:01:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:01,997 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-10-28 23:01:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:01:01,998 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 [2021-10-28 23:01:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:01,999 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:01:01,999 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 23:01:02,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:01:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 23:01:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2021-10-28 23:01:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.32) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:01:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-10-28 23:01:02,005 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 15 [2021-10-28 23:01:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:02,005 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-10-28 23:01:02,005 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) [2021-10-28 23:01:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-10-28 23:01:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:01:02,006 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:02,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:02,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-28 23:01:02,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:01:02,226 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrlenErr0REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash -77704130, now seen corresponding path program 1 times [2021-10-28 23:01:02,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:02,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127286175] [2021-10-28 23:01:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:02,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:02,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:01:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:02,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:02,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127286175] [2021-10-28 23:01:02,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127286175] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:01:02,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:01:02,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:01:02,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357632789] [2021-10-28 23:01:02,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:01:02,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:02,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:01:02,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:01:02,358 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:01:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:02,533 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-10-28 23:01:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:01:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-10-28 23:01:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:02,537 INFO L225 Difference]: With dead ends: 36 [2021-10-28 23:01:02,537 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 23:01:02,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:01:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 23:01:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 23:01:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:01:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-10-28 23:01:02,549 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2021-10-28 23:01:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:02,549 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-10-28 23:01:02,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:01:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-10-28 23:01:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:01:02,550 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:02,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:02,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:01:02,551 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrlenErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -77704129, now seen corresponding path program 1 times [2021-10-28 23:01:02,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:02,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249580135] [2021-10-28 23:01:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:02,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:02,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:01:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:02,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:02,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249580135] [2021-10-28 23:01:02,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249580135] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:01:02,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:01:02,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 23:01:02,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789766737] [2021-10-28 23:01:02,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:01:02,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:02,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:01:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:01:02,747 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:01:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:03,028 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-28 23:01:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:01:03,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-10-28 23:01:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:03,030 INFO L225 Difference]: With dead ends: 40 [2021-10-28 23:01:03,030 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 23:01:03,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:01:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 23:01:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-10-28 23:01:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:01:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-10-28 23:01:03,034 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2021-10-28 23:01:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:03,035 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-10-28 23:01:03,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:01:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-10-28 23:01:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:01:03,035 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:03,036 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:03,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:01:03,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrlenErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1659223880, now seen corresponding path program 1 times [2021-10-28 23:01:03,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:03,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924943690] [2021-10-28 23:01:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:03,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:03,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:03,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:01:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:03,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:03,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924943690] [2021-10-28 23:01:03,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924943690] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:01:03,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:01:03,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 23:01:03,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702594221] [2021-10-28 23:01:03,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:01:03,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:01:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:01:03,183 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:01:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:03,467 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-10-28 23:01:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:01:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-28 23:01:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:03,469 INFO L225 Difference]: With dead ends: 55 [2021-10-28 23:01:03,469 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 23:01:03,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:01:03,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 23:01:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-10-28 23:01:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 23:01:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-10-28 23:01:03,480 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 20 [2021-10-28 23:01:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:03,480 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-10-28 23:01:03,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:01:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-10-28 23:01:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:01:03,482 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:03,482 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:03,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:01:03,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrlenErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:03,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2048937402, now seen corresponding path program 1 times [2021-10-28 23:01:03,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:03,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990312272] [2021-10-28 23:01:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:03,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:03,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:03,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:01:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:01:03,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:03,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990312272] [2021-10-28 23:01:03,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990312272] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:01:03,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:01:03,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 23:01:03,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921310623] [2021-10-28 23:01:03,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:01:03,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:01:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:01:03,714 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:01:04,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:04,079 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-10-28 23:01:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:01:04,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-28 23:01:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:04,080 INFO L225 Difference]: With dead ends: 71 [2021-10-28 23:01:04,080 INFO L226 Difference]: Without dead ends: 71 [2021-10-28 23:01:04,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:01:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-28 23:01:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-10-28 23:01:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 23:01:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-10-28 23:01:04,086 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 20 [2021-10-28 23:01:04,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:04,086 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-10-28 23:01:04,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:01:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-10-28 23:01:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:01:04,087 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:04,087 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:04,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:01:04,088 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrlenErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 7 more)] === [2021-10-28 23:01:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash 863431255, now seen corresponding path program 1 times [2021-10-28 23:01:04,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:04,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003893783] [2021-10-28 23:01:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:04,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:01:04,104 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:01:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:01:04,133 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:01:04,133 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:01:04,134 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location cstrlenErr1REQUIRES_VIOLATION [2021-10-28 23:01:04,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr0REQUIRES_VIOLATION [2021-10-28 23:01:04,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr1REQUIRES_VIOLATION [2021-10-28 23:01:04,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr2REQUIRES_VIOLATION [2021-10-28 23:01:04,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr3REQUIRES_VIOLATION [2021-10-28 23:01:04,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:01:04,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:01:04,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:01:04,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:01:04,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrlenErr0REQUIRES_VIOLATION [2021-10-28 23:01:04,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:01:04,141 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:04,144 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:01:04,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:01:04 BoogieIcfgContainer [2021-10-28 23:01:04,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:01:04,164 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:01:04,165 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:01:04,165 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:01:04,165 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:00:59" (3/4) ... [2021-10-28 23:01:04,167 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:01:04,210 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:01:04,210 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:01:04,212 INFO L168 Benchmark]: Toolchain (without parser) took 5355.85 ms. Allocated memory was 157.3 MB in the beginning and 203.4 MB in the end (delta: 46.1 MB). Free memory was 124.4 MB in the beginning and 121.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:04,214 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory was 43.0 MB in the beginning and 42.9 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:01:04,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 520.90 ms. Allocated memory is still 157.3 MB. Free memory was 124.1 MB in the beginning and 128.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:04,217 INFO L168 Benchmark]: Boogie Preprocessor took 77.97 ms. Allocated memory is still 157.3 MB. Free memory was 128.3 MB in the beginning and 125.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:04,218 INFO L168 Benchmark]: RCFGBuilder took 537.43 ms. Allocated memory is still 157.3 MB. Free memory was 125.7 MB in the beginning and 107.2 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:04,218 INFO L168 Benchmark]: TraceAbstraction took 4165.60 ms. Allocated memory was 157.3 MB in the beginning and 203.4 MB in the end (delta: 46.1 MB). Free memory was 106.9 MB in the beginning and 123.7 MB in the end (delta: -16.9 MB). Peak memory consumption was 32.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:04,219 INFO L168 Benchmark]: Witness Printer took 46.02 ms. Allocated memory is still 203.4 MB. Free memory was 123.7 MB in the beginning and 121.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:04,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory was 43.0 MB in the beginning and 42.9 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 520.90 ms. Allocated memory is still 157.3 MB. Free memory was 124.1 MB in the beginning and 128.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 77.97 ms. Allocated memory is still 157.3 MB. Free memory was 128.3 MB in the beginning and 125.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 537.43 ms. Allocated memory is still 157.3 MB. Free memory was 125.7 MB in the beginning and 107.2 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4165.60 ms. Allocated memory was 157.3 MB in the beginning and 203.4 MB in the end (delta: 46.1 MB). Free memory was 106.9 MB in the beginning and 123.7 MB in the end (delta: -16.9 MB). Peak memory consumption was 32.1 MB. Max. memory is 16.1 GB. * Witness Printer took 46.02 ms. Allocated memory is still 203.4 MB. Free memory was 123.7 MB in the beginning and 121.6 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 532]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L537] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) VAL [length=2] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=2, nondetString={-1:0}] [L521] COND TRUE i < length - 1 [L523] nondetString[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=0, length=2, nondetString={-1:0}] [L521] i++ VAL [i=1, length=2, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=1, length=2, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=1, length=2, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=1, length=2, nondetString={-1:0}] [L537] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L537] char* p = build_nondet_String(); [L538] CALL cstrlen(p) VAL [s={-1:0}] [L531] const char *p = s; VAL [p={-1:0}, s={-1:0}, s={-1:0}] [L532] EXPR \read(*p) VAL [\read(*p)=-2, p={-1:0}, s={-1:0}, s={-1:0}] [L532] COND TRUE *p != '\0' [L533] p = p+2 VAL [p={-1:2}, s={-1:0}, s={-1:0}] [L532] \read(*p) - 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: 526]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 526]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 58 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 4.0s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 232 SDtfs, 342 SDslu, 465 SDs, 0 SdLazy, 1223 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=9, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 51 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 709 SizeOfPredicates, 1 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 3/6 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! [2021-10-28 23:01:04,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_008c24e8-d3b7-4d69-b034-b4ab7a4f1eef/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...