./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/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_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/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_bb0312af-b2af-43f7-8563-7efc4c6ddfde/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 ce305d75684696e5fabb4c8d08830bbd90a67b7669f979309850a29850c4f917 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:51:41,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:51:41,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:51:41,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:51:41,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:51:41,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:51:41,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:51:41,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:51:41,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:51:41,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:51:41,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:51:41,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:51:41,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:51:41,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:51:41,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:51:41,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:51:41,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:51:41,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:51:41,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:51:41,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:51:41,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:51:41,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:51:41,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:51:41,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:51:41,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:51:41,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:51:41,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:51:41,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:51:41,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:51:41,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:51:41,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:51:41,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:51:41,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:51:41,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:51:41,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:51:41,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:51:41,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:51:41,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:51:41,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:51:41,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:51:41,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:51:41,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:51:41,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:51:41,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:51:41,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:51:41,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:51:41,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:51:41,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:51:41,612 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:51:41,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:51:41,612 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:51:41,613 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:51:41,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:51:41,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:51:41,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:51:41,615 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:51:41,615 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:51:41,615 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:51:41,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:51:41,616 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:51:41,616 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:51:41,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:51:41,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:51:41,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:51:41,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:51:41,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:41,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:51:41,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:51:41,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:51:41,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:51:41,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:51:41,620 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_bb0312af-b2af-43f7-8563-7efc4c6ddfde/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce305d75684696e5fabb4c8d08830bbd90a67b7669f979309850a29850c4f917 [2021-10-28 22:51:41,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:51:41,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:51:41,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:51:41,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:51:41,936 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:51:41,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-10-28 22:51:42,002 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/data/924786327/db00e82b3f204ddd8f559c73260a8034/FLAG887b2460e [2021-10-28 22:51:42,531 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:51:42,532 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-10-28 22:51:42,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/data/924786327/db00e82b3f204ddd8f559c73260a8034/FLAG887b2460e [2021-10-28 22:51:42,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/data/924786327/db00e82b3f204ddd8f559c73260a8034 [2021-10-28 22:51:42,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:51:42,851 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:51:42,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:42,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:51:42,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:51:42,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:42" (1/1) ... [2021-10-28 22:51:42,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a779967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:42, skipping insertion in model container [2021-10-28 22:51:42,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:42" (1/1) ... [2021-10-28 22:51:42,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:51:42,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:51:43,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:43,319 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:51:43,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:43,390 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:51:43,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43 WrapperNode [2021-10-28 22:51:43,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:43,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:51:43,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:51:43,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:51:43,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (1/1) ... [2021-10-28 22:51:43,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (1/1) ... [2021-10-28 22:51:43,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (1/1) ... [2021-10-28 22:51:43,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (1/1) ... [2021-10-28 22:51:43,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (1/1) ... [2021-10-28 22:51:43,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (1/1) ... [2021-10-28 22:51:43,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (1/1) ... [2021-10-28 22:51:43,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:51:43,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:51:43,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:51:43,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:51:43,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (1/1) ... [2021-10-28 22:51:43,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:43,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:43,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:51:43,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:51:43,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:51:43,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:51:43,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:51:43,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:51:43,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 22:51:43,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 22:51:43,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 22:51:43,562 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2021-10-28 22:51:43,562 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-10-28 22:51:43,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:51:43,563 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:51:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:51:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:51:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:51:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:51:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:51:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:51:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:51:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:51:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:51:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:51:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:51:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:51:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:51:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:51:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:51:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:51:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:51:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 22:51:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 22:51:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 22:51:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:51:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:51:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:51:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:51:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:51:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:51:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:51:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:51:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:51:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:51:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:51:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:51:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:51:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:51:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:51:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:51:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:51:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:51:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:51:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:51:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:51:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:51:43,570 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:51:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:51:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:51:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:51:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:51:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:51:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:51:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:51:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:51:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:51:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:51:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:51:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:51:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:51:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:51:43,574 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:51:43,574 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:51:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:51:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:51:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:51:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:51:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:51:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:51:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:51:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:51:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:51:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:51:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:51:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:51:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:51:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:51:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:51:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:51:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:51:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:51:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:51:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:51:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:51:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:51:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:51:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:51:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:51:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:51:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:51:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:51:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:51:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:51:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:51:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:51:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:51:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:51:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:51:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:51:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:51:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:51:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:51:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:51:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:51:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:51:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:51:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:51:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:51:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:51:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:51:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:51:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 22:51:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2021-10-28 22:51:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:51:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:51:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-10-28 22:51:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:51:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:51:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:51:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:51:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:51:44,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:51:44,156 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 22:51:44,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:44 BoogieIcfgContainer [2021-10-28 22:51:44,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:51:44,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:51:44,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:51:44,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:51:44,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:51:42" (1/3) ... [2021-10-28 22:51:44,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a8a4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:44, skipping insertion in model container [2021-10-28 22:51:44,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:43" (2/3) ... [2021-10-28 22:51:44,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a8a4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:44, skipping insertion in model container [2021-10-28 22:51:44,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:44" (3/3) ... [2021-10-28 22:51:44,173 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2021-10-28 22:51:44,184 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:51:44,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-10-28 22:51:44,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:51:44,241 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 22:51:44,242 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-28 22:51:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 40 states have (on average 1.8) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:51:44,269 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:44,285 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:44,285 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting build_nondet_StringErr2REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1361999972, now seen corresponding path program 1 times [2021-10-28 22:51:44,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:44,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136441211] [2021-10-28 22:51:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:44,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:44,517 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 22:51:44,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:44,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136441211] [2021-10-28 22:51:44,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136441211] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:44,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:44,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:51:44,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590867361] [2021-10-28 22:51:44,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:51:44,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:51:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:44,546 INFO L87 Difference]: Start difference. First operand has 73 states, 40 states have (on average 1.8) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:44,735 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-10-28 22:51:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:51:44,737 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 22:51:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:44,747 INFO L225 Difference]: With dead ends: 71 [2021-10-28 22:51:44,747 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 22:51:44,749 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 22:51:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 22:51:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-28 22:51:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-10-28 22:51:44,792 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 11 [2021-10-28 22:51:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:44,793 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-10-28 22:51:44,793 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 22:51:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-10-28 22:51:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:51:44,794 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:44,795 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:44,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:51:44,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting build_nondet_StringErr3REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1361999971, now seen corresponding path program 1 times [2021-10-28 22:51:44,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:44,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672650136] [2021-10-28 22:51:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:44,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:44,894 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 22:51:44,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:44,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672650136] [2021-10-28 22:51:44,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672650136] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:44,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:44,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:51:44,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804247867] [2021-10-28 22:51:44,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:51:44,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:51:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:51:44,898 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:45,068 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-10-28 22:51:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:51:45,069 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 22:51:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:45,075 INFO L225 Difference]: With dead ends: 67 [2021-10-28 22:51:45,075 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 22:51:45,077 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 22:51:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 22:51:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-28 22:51:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.641025641025641) internal successors, (64), 58 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-10-28 22:51:45,102 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 11 [2021-10-28 22:51:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:45,103 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-10-28 22:51:45,103 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 22:51:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-10-28 22:51:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:51:45,104 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:45,104 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:45,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:51:45,105 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1361999918, now seen corresponding path program 1 times [2021-10-28 22:51:45,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:45,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227491449] [2021-10-28 22:51:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:45,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:45,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:45,196 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 22:51:45,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:45,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227491449] [2021-10-28 22:51:45,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227491449] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:45,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:45,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:51:45,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866690076] [2021-10-28 22:51:45,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:51:45,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:51:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:51:45,200 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:45,368 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-28 22:51:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:51:45,369 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 22:51:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:45,372 INFO L225 Difference]: With dead ends: 73 [2021-10-28 22:51:45,375 INFO L226 Difference]: Without dead ends: 73 [2021-10-28 22:51:45,375 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 22:51:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-28 22:51:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2021-10-28 22:51:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 60 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-10-28 22:51:45,403 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 11 [2021-10-28 22:51:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:45,403 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-10-28 22:51:45,403 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 22:51:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-10-28 22:51:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:51:45,404 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:45,404 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:45,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:51:45,405 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1361940336, now seen corresponding path program 1 times [2021-10-28 22:51:45,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:45,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501717764] [2021-10-28 22:51:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:45,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:45,570 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 22:51:45,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:45,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501717764] [2021-10-28 22:51:45,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501717764] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:45,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:45,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:51:45,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095057156] [2021-10-28 22:51:45,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:51:45,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:51:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:51:45,580 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:45,776 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-10-28 22:51:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:51:45,777 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 22:51:45,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:45,778 INFO L225 Difference]: With dead ends: 77 [2021-10-28 22:51:45,779 INFO L226 Difference]: Without dead ends: 77 [2021-10-28 22:51:45,779 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 22:51:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-28 22:51:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-28 22:51:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 62 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-10-28 22:51:45,786 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 11 [2021-10-28 22:51:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:45,787 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-10-28 22:51:45,787 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 22:51:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-10-28 22:51:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:51:45,788 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:45,788 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:45,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:51:45,788 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash 670453331, now seen corresponding path program 1 times [2021-10-28 22:51:45,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:45,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959597012] [2021-10-28 22:51:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:45,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:45,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:45,894 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 22:51:45,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:45,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959597012] [2021-10-28 22:51:45,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959597012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:45,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656520973] [2021-10-28 22:51:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:45,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:45,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:45,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:51:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 22:51:46,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:46,189 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 22:51:46,333 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 22:51:46,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656520973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:46,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:51:46,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 22:51:46,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832044172] [2021-10-28 22:51:46,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:51:46,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:51:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:51:46,337 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:46,572 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-10-28 22:51:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:51:46,573 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 22:51:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:46,574 INFO L225 Difference]: With dead ends: 76 [2021-10-28 22:51:46,574 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 22:51:46,575 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 22:51:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 22:51:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-10-28 22:51:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-10-28 22:51:46,587 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 15 [2021-10-28 22:51:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:46,587 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-10-28 22:51:46,588 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 22:51:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-10-28 22:51:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:51:46,589 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:46,590 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:46,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:46,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:46,815 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash 140003118, now seen corresponding path program 1 times [2021-10-28 22:51:46,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:46,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526546893] [2021-10-28 22:51:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:46,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:46,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:46,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 22:51:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:46,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 22:51:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:51:47,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:47,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526546893] [2021-10-28 22:51:47,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526546893] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:47,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742670966] [2021-10-28 22:51:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:47,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:47,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:47,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:47,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:51:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:47,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 22:51:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:47,264 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 22:51:47,461 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 22:51:47,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 22:51:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:47,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742670966] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:47,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:51:47,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-10-28 22:51:47,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664725266] [2021-10-28 22:51:47,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 22:51:47,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 22:51:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:51:47,640 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:51:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:48,254 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-10-28 22:51:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:51:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-10-28 22:51:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:48,256 INFO L225 Difference]: With dead ends: 65 [2021-10-28 22:51:48,256 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 22:51:48,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-10-28 22:51:48,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 22:51:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-28 22:51:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 56 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-28 22:51:48,261 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 28 [2021-10-28 22:51:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:48,262 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-28 22:51:48,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:51:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-28 22:51:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:51:48,263 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:48,263 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:48,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:48,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:48,491 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash 140003119, now seen corresponding path program 1 times [2021-10-28 22:51:48,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:48,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240995820] [2021-10-28 22:51:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:48,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:48,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:48,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 22:51:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:48,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 22:51:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:51:48,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:48,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240995820] [2021-10-28 22:51:48,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240995820] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:48,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348072337] [2021-10-28 22:51:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:48,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:48,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:48,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:48,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:51:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 22:51:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:49,027 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 22:51:49,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-10-28 22:51:49,317 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:51:49,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-28 22:51:49,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:51:49,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-28 22:51:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:49,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348072337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:49,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:51:49,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 17 [2021-10-28 22:51:49,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912970408] [2021-10-28 22:51:49,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 22:51:49,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 22:51:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:51:49,374 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:51:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:50,131 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2021-10-28 22:51:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:51:50,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-10-28 22:51:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:50,133 INFO L225 Difference]: With dead ends: 90 [2021-10-28 22:51:50,133 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 22:51:50,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:51:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 22:51:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2021-10-28 22:51:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 58 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-10-28 22:51:50,140 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 28 [2021-10-28 22:51:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:50,141 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-10-28 22:51:50,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:51:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-10-28 22:51:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 22:51:50,142 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:50,143 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:50,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:50,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 22:51:50,343 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrpbrkErr4REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash 124645684, now seen corresponding path program 1 times [2021-10-28 22:51:50,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:50,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182360073] [2021-10-28 22:51:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:50,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:50,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 22:51:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:50,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 22:51:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 22:51:50,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:50,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182360073] [2021-10-28 22:51:50,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182360073] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:50,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:50,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 22:51:50,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377105109] [2021-10-28 22:51:50,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:51:50,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:50,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:51:50,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:51:50,489 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:50,799 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-10-28 22:51:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:51:50,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-10-28 22:51:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:50,800 INFO L225 Difference]: With dead ends: 67 [2021-10-28 22:51:50,800 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 22:51:50,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:51:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 22:51:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-10-28 22:51:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 55 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-10-28 22:51:50,806 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 32 [2021-10-28 22:51:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:50,807 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-10-28 22:51:50,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-10-28 22:51:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 22:51:50,809 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:50,809 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:50,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 22:51:50,809 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash 124645685, now seen corresponding path program 1 times [2021-10-28 22:51:50,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:50,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584283086] [2021-10-28 22:51:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:50,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:50,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:50,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 22:51:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:50,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 22:51:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:51:51,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:51,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584283086] [2021-10-28 22:51:51,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584283086] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:51,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:51,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 22:51:51,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641793640] [2021-10-28 22:51:51,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:51:51,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:51:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:51:51,012 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:51,534 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2021-10-28 22:51:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:51:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-10-28 22:51:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:51,536 INFO L225 Difference]: With dead ends: 125 [2021-10-28 22:51:51,536 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 22:51:51,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:51:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 22:51:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2021-10-28 22:51:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.4125) internal successors, (113), 91 states have internal predecessors, (113), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 22:51:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2021-10-28 22:51:51,544 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 32 [2021-10-28 22:51:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:51,545 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2021-10-28 22:51:51,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2021-10-28 22:51:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 22:51:51,547 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:51,547 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:51,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 22:51:51,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1155217993, now seen corresponding path program 1 times [2021-10-28 22:51:51,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:51,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534949902] [2021-10-28 22:51:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:51,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:51,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:51,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 22:51:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:51,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 22:51:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:51:51,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:51,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534949902] [2021-10-28 22:51:51,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534949902] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:51,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:51,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 22:51:51,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735717393] [2021-10-28 22:51:51,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:51:51,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:51:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:51:51,765 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:52,256 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2021-10-28 22:51:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:51:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-10-28 22:51:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:52,258 INFO L225 Difference]: With dead ends: 124 [2021-10-28 22:51:52,258 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 22:51:52,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:51:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 22:51:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 70. [2021-10-28 22:51:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 61 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:51:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-10-28 22:51:52,263 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 32 [2021-10-28 22:51:52,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:52,264 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-10-28 22:51:52,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-10-28 22:51:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 22:51:52,265 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:52,265 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:52,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 22:51:52,266 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-10-28 22:51:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -431506202, now seen corresponding path program 1 times [2021-10-28 22:51:52,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:52,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684139663] [2021-10-28 22:51:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:52,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:51:52,297 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 22:51:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:51:52,350 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 22:51:52,351 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 22:51:52,352 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:51:52,353 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr0REQUIRES_VIOLATION [2021-10-28 22:51:52,354 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr1REQUIRES_VIOLATION [2021-10-28 22:51:52,354 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr2REQUIRES_VIOLATION [2021-10-28 22:51:52,354 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr3REQUIRES_VIOLATION [2021-10-28 22:51:52,354 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr0REQUIRES_VIOLATION [2021-10-28 22:51:52,354 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr1REQUIRES_VIOLATION [2021-10-28 22:51:52,355 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr2REQUIRES_VIOLATION [2021-10-28 22:51:52,355 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr3REQUIRES_VIOLATION [2021-10-28 22:51:52,355 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr4REQUIRES_VIOLATION [2021-10-28 22:51:52,355 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr5REQUIRES_VIOLATION [2021-10-28 22:51:52,355 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr6REQUIRES_VIOLATION [2021-10-28 22:51:52,356 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr7REQUIRES_VIOLATION [2021-10-28 22:51:52,356 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr8REQUIRES_VIOLATION [2021-10-28 22:51:52,356 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr9REQUIRES_VIOLATION [2021-10-28 22:51:52,356 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:51:52,357 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:52,357 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:52,357 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:52,357 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:52,357 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:52,358 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:52,358 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:51:52,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 22:51:52,363 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:52,367 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:51:52,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:51:52 BoogieIcfgContainer [2021-10-28 22:51:52,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:51:52,424 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:51:52,424 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:51:52,424 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:51:52,425 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:44" (3/4) ... [2021-10-28 22:51:52,426 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 22:51:52,471 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:51:52,471 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:51:52,472 INFO L168 Benchmark]: Toolchain (without parser) took 9621.51 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 88.8 MB in the beginning and 77.1 MB in the end (delta: 11.7 MB). Peak memory consumption was 36.9 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:52,473 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 119.5 MB. Free memory is still 72.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:51:52,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 526.03 ms. Allocated memory is still 119.5 MB. Free memory was 88.5 MB in the beginning and 88.6 MB in the end (delta: -111.0 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:52,474 INFO L168 Benchmark]: Boogie Preprocessor took 63.75 ms. Allocated memory is still 119.5 MB. Free memory was 88.6 MB in the beginning and 86.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:52,474 INFO L168 Benchmark]: RCFGBuilder took 701.86 ms. Allocated memory is still 119.5 MB. Free memory was 86.1 MB in the beginning and 65.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:52,475 INFO L168 Benchmark]: TraceAbstraction took 8263.26 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 64.7 MB in the beginning and 79.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:52,475 INFO L168 Benchmark]: Witness Printer took 47.88 ms. Allocated memory is still 144.7 MB. Free memory was 79.2 MB in the beginning and 77.1 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:51:52,477 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 119.5 MB. Free memory is still 72.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 526.03 ms. Allocated memory is still 119.5 MB. Free memory was 88.5 MB in the beginning and 88.6 MB in the end (delta: -111.0 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.75 ms. Allocated memory is still 119.5 MB. Free memory was 88.6 MB in the beginning and 86.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 701.86 ms. Allocated memory is still 119.5 MB. Free memory was 86.1 MB in the beginning and 65.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8263.26 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 64.7 MB in the beginning and 79.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Witness Printer took 47.88 ms. Allocated memory is still 144.7 MB. Free memory was 79.2 MB in the beginning and 77.1 MB in the end (delta: 2.1 MB). There was no memory consumed. 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: 548]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L546] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-1:0}] [L527] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-1:0}] [L528] return nondetString; VAL [\result={-1:0}, i=0, length=1, nondetString={-1:0}] [L546] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L546] char* s1 = build_nondet_String(); [L547] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-2:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-2:0}] [L527] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-2:0}] [L528] return nondetString; VAL [\result={-2:0}, i=0, length=1, nondetString={-2:0}] [L547] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-2:0}, s1={-1:0}] [L547] char* s2 = build_nondet_String(); [L548] CALL cstrpbrk(s1,s2) VAL [s1={-1:0}, s2={-2:0}] [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 VAL [s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L535] EXPR \read(*sc1) VAL [\read(*sc1)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; VAL [\result={0:0}, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L548] RET cstrpbrk(s1,s2) VAL [cstrpbrk(s1,s2)={0:0}, s1={-1:0}, s2={-2:0}] - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 88 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 486 SDtfs, 1284 SDslu, 1068 SDs, 0 SdLazy, 2992 SolverSat, 134 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=9, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 120 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 315 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 269 ConstructedInterpolants, 14 QuantifiedInterpolants, 1647 SizeOfPredicates, 14 NumberOfNonLiveVariables, 339 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 38/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 22:51:52,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb0312af-b2af-43f7-8563-7efc4c6ddfde/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...