./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 15362e3354379e86b7768de02eb760f50ed72879 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-906a4fb [2020-10-19 17:55:47,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 17:55:47,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 17:55:47,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 17:55:47,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 17:55:47,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 17:55:47,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 17:55:47,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 17:55:47,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 17:55:47,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 17:55:47,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 17:55:47,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 17:55:47,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 17:55:47,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 17:55:47,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 17:55:47,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 17:55:47,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 17:55:47,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 17:55:47,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 17:55:47,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 17:55:47,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 17:55:47,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 17:55:47,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 17:55:47,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 17:55:47,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 17:55:47,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 17:55:47,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 17:55:47,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 17:55:47,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 17:55:47,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 17:55:47,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 17:55:47,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 17:55:47,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 17:55:47,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 17:55:47,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 17:55:47,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 17:55:47,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 17:55:47,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 17:55:47,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 17:55:47,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 17:55:47,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 17:55:47,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 17:55:47,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 17:55:47,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 17:55:47,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 17:55:47,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 17:55:47,393 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 17:55:47,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 17:55:47,393 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 17:55:47,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 17:55:47,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 17:55:47,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 17:55:47,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 17:55:47,396 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 17:55:47,396 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 17:55:47,397 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 17:55:47,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 17:55:47,397 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 17:55:47,398 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 17:55:47,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 17:55:47,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 17:55:47,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 17:55:47,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 17:55:47,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 17:55:47,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:55:47,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 17:55:47,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 17:55:47,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 17:55:47,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 17:55:47,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 17:55:47,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> 15362e3354379e86b7768de02eb760f50ed72879 [2020-10-19 17:55:47,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 17:55:47,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 17:55:47,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 17:55:47,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 17:55:47,728 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 17:55:47,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2020-10-19 17:55:47,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cade8051/df177e49fb7346638b51d18042180e36/FLAGa73d86841 [2020-10-19 17:55:48,286 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 17:55:48,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2020-10-19 17:55:48,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cade8051/df177e49fb7346638b51d18042180e36/FLAGa73d86841 [2020-10-19 17:55:48,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cade8051/df177e49fb7346638b51d18042180e36 [2020-10-19 17:55:48,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 17:55:48,614 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 17:55:48,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 17:55:48,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 17:55:48,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 17:55:48,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:55:48" (1/1) ... [2020-10-19 17:55:48,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab8e8d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:48, skipping insertion in model container [2020-10-19 17:55:48,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:55:48" (1/1) ... [2020-10-19 17:55:48,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 17:55:48,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 17:55:49,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:55:49,065 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 17:55:49,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:55:49,247 INFO L208 MainTranslator]: Completed translation [2020-10-19 17:55:49,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49 WrapperNode [2020-10-19 17:55:49,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 17:55:49,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 17:55:49,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 17:55:49,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 17:55:49,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (1/1) ... [2020-10-19 17:55:49,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (1/1) ... [2020-10-19 17:55:49,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (1/1) ... [2020-10-19 17:55:49,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (1/1) ... [2020-10-19 17:55:49,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (1/1) ... [2020-10-19 17:55:49,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (1/1) ... [2020-10-19 17:55:49,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (1/1) ... [2020-10-19 17:55:49,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 17:55:49,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 17:55:49,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 17:55:49,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 17:55:49,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:55:49,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 17:55:49,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 17:55:49,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 17:55:49,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 17:55:49,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 17:55:49,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 17:55:49,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 17:55:49,389 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2020-10-19 17:55:49,390 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2020-10-19 17:55:49,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 17:55:49,391 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 17:55:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 17:55:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 17:55:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 17:55:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 17:55:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 17:55:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 17:55:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 17:55:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 17:55:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 17:55:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 17:55:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 17:55:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 17:55:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 17:55:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 17:55:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 17:55:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 17:55:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 17:55:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 17:55:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 17:55:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 17:55:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 17:55:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 17:55:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 17:55:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 17:55:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 17:55:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 17:55:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 17:55:49,404 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 17:55:49,404 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 17:55:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 17:55:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 17:55:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 17:55:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 17:55:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 17:55:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 17:55:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 17:55:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 17:55:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 17:55:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 17:55:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 17:55:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 17:55:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 17:55:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 17:55:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 17:55:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 17:55:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 17:55:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 17:55:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 17:55:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 17:55:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 17:55:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 17:55:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 17:55:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 17:55:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 17:55:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 17:55:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 17:55:49,412 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 17:55:49,413 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 17:55:49,413 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 17:55:49,413 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 17:55:49,413 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 17:55:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 17:55:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 17:55:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 17:55:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 17:55:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 17:55:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 17:55:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 17:55:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 17:55:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 17:55:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 17:55:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 17:55:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 17:55:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 17:55:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 17:55:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 17:55:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 17:55:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 17:55:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 17:55:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 17:55:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 17:55:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 17:55:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 17:55:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-19 17:55:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2020-10-19 17:55:49,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 17:55:49,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 17:55:49,423 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2020-10-19 17:55:49,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 17:55:49,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 17:55:49,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 17:55:49,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 17:55:49,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 17:55:49,894 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 17:55:49,894 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-19 17:55:49,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:55:49 BoogieIcfgContainer [2020-10-19 17:55:49,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 17:55:49,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 17:55:49,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 17:55:49,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 17:55:49,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 05:55:48" (1/3) ... [2020-10-19 17:55:49,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396d0523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:55:49, skipping insertion in model container [2020-10-19 17:55:49,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:55:49" (2/3) ... [2020-10-19 17:55:49,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396d0523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:55:49, skipping insertion in model container [2020-10-19 17:55:49,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:55:49" (3/3) ... [2020-10-19 17:55:49,906 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe.i [2020-10-19 17:55:49,918 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 17:55:49,926 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-10-19 17:55:49,941 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-10-19 17:55:49,962 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 17:55:49,963 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 17:55:49,963 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 17:55:49,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 17:55:49,964 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 17:55:49,964 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 17:55:49,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 17:55:49,965 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 17:55:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-19 17:55:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:55:49,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:49,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:49,998 INFO L429 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:50,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316378, now seen corresponding path program 1 times [2020-10-19 17:55:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:50,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744389857] [2020-10-19 17:55:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:50,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:50,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744389857] [2020-10-19 17:55:50,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:55:50,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 17:55:50,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488455057] [2020-10-19 17:55:50,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 17:55:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 17:55:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:55:50,258 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-10-19 17:55:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:50,395 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-19 17:55:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:55:50,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 17:55:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:50,408 INFO L225 Difference]: With dead ends: 41 [2020-10-19 17:55:50,408 INFO L226 Difference]: Without dead ends: 38 [2020-10-19 17:55:50,411 INFO L677 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 [2020-10-19 17:55:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-19 17:55:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-19 17:55:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 17:55:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-19 17:55:50,454 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 11 [2020-10-19 17:55:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:50,455 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-19 17:55:50,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 17:55:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-19 17:55:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:55:50,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:50,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:50,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 17:55:50,458 INFO L429 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:50,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316379, now seen corresponding path program 1 times [2020-10-19 17:55:50,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:50,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907574601] [2020-10-19 17:55:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:50,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907574601] [2020-10-19 17:55:50,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:55:50,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:55:50,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552693017] [2020-10-19 17:55:50,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:55:50,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:50,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:55:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:55:50,572 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 5 states. [2020-10-19 17:55:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:50,678 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-19 17:55:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:55:50,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 17:55:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:50,680 INFO L225 Difference]: With dead ends: 37 [2020-10-19 17:55:50,680 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 17:55:50,682 INFO L677 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 [2020-10-19 17:55:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 17:55:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-19 17:55:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-19 17:55:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-19 17:55:50,689 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2020-10-19 17:55:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:50,690 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-19 17:55:50,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:55:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-19 17:55:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:55:50,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:50,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:50,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 17:55:50,692 INFO L429 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316432, now seen corresponding path program 1 times [2020-10-19 17:55:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:50,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811420474] [2020-10-19 17:55:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:50,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:50,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811420474] [2020-10-19 17:55:50,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:55:50,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:55:50,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453654703] [2020-10-19 17:55:50,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:55:50,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:55:50,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:55:50,791 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-10-19 17:55:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:50,906 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-19 17:55:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:55:50,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 17:55:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:50,913 INFO L225 Difference]: With dead ends: 43 [2020-10-19 17:55:50,914 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 17:55:50,916 INFO L677 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 [2020-10-19 17:55:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 17:55:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-10-19 17:55:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 17:55:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-19 17:55:50,929 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-10-19 17:55:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:50,929 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-19 17:55:50,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:55:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-19 17:55:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:55:50,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:50,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:50,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 17:55:50,937 INFO L429 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1978376014, now seen corresponding path program 1 times [2020-10-19 17:55:50,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:50,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749144668] [2020-10-19 17:55:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:51,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:51,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749144668] [2020-10-19 17:55:51,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:55:51,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:55:51,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125003123] [2020-10-19 17:55:51,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:55:51,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:51,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:55:51,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:55:51,012 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-10-19 17:55:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:51,140 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-19 17:55:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:55:51,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 17:55:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:51,143 INFO L225 Difference]: With dead ends: 47 [2020-10-19 17:55:51,143 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 17:55:51,144 INFO L677 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 [2020-10-19 17:55:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 17:55:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-19 17:55:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 17:55:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-19 17:55:51,151 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 11 [2020-10-19 17:55:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:51,151 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-19 17:55:51,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:55:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-19 17:55:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 17:55:51,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:51,153 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:51,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 17:55:51,154 INFO L429 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:51,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1295904273, now seen corresponding path program 1 times [2020-10-19 17:55:51,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:51,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603553420] [2020-10-19 17:55:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:51,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:51,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603553420] [2020-10-19 17:55:51,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658746589] [2020-10-19 17:55:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:55:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:51,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 17:55:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:55:51,444 INFO L384 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 [2020-10-19 17:55:51,445 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:55:51,459 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:55:51,460 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:55:51,460 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 17:55:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:51,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:55:51,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 17:55:51,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133907689] [2020-10-19 17:55:51,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:55:51,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:51,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:55:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:55:51,503 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 7 states. [2020-10-19 17:55:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:51,649 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-19 17:55:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:55:51,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-19 17:55:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:51,651 INFO L225 Difference]: With dead ends: 46 [2020-10-19 17:55:51,651 INFO L226 Difference]: Without dead ends: 46 [2020-10-19 17:55:51,652 INFO L677 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 [2020-10-19 17:55:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-19 17:55:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2020-10-19 17:55:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 17:55:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-19 17:55:51,657 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 15 [2020-10-19 17:55:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:51,658 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-19 17:55:51,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:55:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-19 17:55:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 17:55:51,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:51,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:51,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:55:51,873 INFO L429 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:51,874 INFO L82 PathProgramCache]: Analyzing trace with hash -77704130, now seen corresponding path program 1 times [2020-10-19 17:55:51,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:51,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434919072] [2020-10-19 17:55:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:51,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:51,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-19 17:55:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:52,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434919072] [2020-10-19 17:55:52,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:55:52,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-19 17:55:52,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873516072] [2020-10-19 17:55:52,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 17:55:52,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 17:55:52,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-19 17:55:52,012 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-19 17:55:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:52,234 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-19 17:55:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:55:52,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-19 17:55:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:52,235 INFO L225 Difference]: With dead ends: 36 [2020-10-19 17:55:52,236 INFO L226 Difference]: Without dead ends: 36 [2020-10-19 17:55:52,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-19 17:55:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-19 17:55:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-19 17:55:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 17:55:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-19 17:55:52,241 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2020-10-19 17:55:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:52,242 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-19 17:55:52,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 17:55:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-19 17:55:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 17:55:52,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:52,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:52,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 17:55:52,244 INFO L429 AbstractCegarLoop]: === Iteration 7 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -77704129, now seen corresponding path program 1 times [2020-10-19 17:55:52,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:52,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961023684] [2020-10-19 17:55:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:52,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:52,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-19 17:55:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:52,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961023684] [2020-10-19 17:55:52,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:55:52,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-19 17:55:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809608435] [2020-10-19 17:55:52,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 17:55:52,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 17:55:52,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:55:52,425 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2020-10-19 17:55:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:52,777 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-19 17:55:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 17:55:52,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-19 17:55:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:52,779 INFO L225 Difference]: With dead ends: 40 [2020-10-19 17:55:52,780 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 17:55:52,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-19 17:55:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 17:55:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-19 17:55:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 17:55:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-19 17:55:52,785 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2020-10-19 17:55:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:52,785 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-19 17:55:52,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 17:55:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-19 17:55:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 17:55:52,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:52,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:52,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 17:55:52,787 INFO L429 AbstractCegarLoop]: === Iteration 8 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1659223880, now seen corresponding path program 1 times [2020-10-19 17:55:52,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:52,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497074092] [2020-10-19 17:55:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:52,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-19 17:55:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:53,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497074092] [2020-10-19 17:55:53,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:55:53,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-19 17:55:53,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115870740] [2020-10-19 17:55:53,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 17:55:53,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 17:55:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-19 17:55:53,020 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-10-19 17:55:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:53,432 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-19 17:55:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 17:55:53,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-19 17:55:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:53,434 INFO L225 Difference]: With dead ends: 55 [2020-10-19 17:55:53,434 INFO L226 Difference]: Without dead ends: 55 [2020-10-19 17:55:53,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-19 17:55:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-19 17:55:53,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-19 17:55:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-19 17:55:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-19 17:55:53,447 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 20 [2020-10-19 17:55:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:53,448 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-19 17:55:53,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 17:55:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-19 17:55:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 17:55:53,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:53,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:53,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 17:55:53,450 INFO L429 AbstractCegarLoop]: === Iteration 9 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:53,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2048937402, now seen corresponding path program 1 times [2020-10-19 17:55:53,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:53,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906086428] [2020-10-19 17:55:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:53,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:55:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:53,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-19 17:55:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:55:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:55:53,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906086428] [2020-10-19 17:55:53,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:55:53,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-19 17:55:53,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091955760] [2020-10-19 17:55:53,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 17:55:53,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:55:53,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 17:55:53,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-19 17:55:53,730 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 14 states. [2020-10-19 17:55:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:55:54,116 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-19 17:55:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 17:55:54,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-10-19 17:55:54,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:55:54,118 INFO L225 Difference]: With dead ends: 71 [2020-10-19 17:55:54,118 INFO L226 Difference]: Without dead ends: 71 [2020-10-19 17:55:54,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-19 17:55:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-19 17:55:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2020-10-19 17:55:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-19 17:55:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-19 17:55:54,137 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 20 [2020-10-19 17:55:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:55:54,138 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-19 17:55:54,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 17:55:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-19 17:55:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 17:55:54,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:55:54,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:55:54,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 17:55:54,142 INFO L429 AbstractCegarLoop]: === Iteration 10 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 17:55:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:55:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash 863431255, now seen corresponding path program 1 times [2020-10-19 17:55:54,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:55:54,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123821747] [2020-10-19 17:55:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:55:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 17:55:54,162 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 17:55:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 17:55:54,173 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 17:55:54,198 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 17:55:54,199 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 17:55:54,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 17:55:54,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 05:55:54 BoogieIcfgContainer [2020-10-19 17:55:54,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 17:55:54,236 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 17:55:54,236 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 17:55:54,237 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 17:55:54,237 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:55:49" (3/4) ... [2020-10-19 17:55:54,240 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 17:55:54,300 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 17:55:54,300 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 17:55:54,302 INFO L168 Benchmark]: Toolchain (without parser) took 5693.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 207.6 MB). Free memory was 958.6 MB in the beginning and 1000.0 MB in the end (delta: -41.4 MB). Peak memory consumption was 166.3 MB. Max. memory is 11.5 GB. [2020-10-19 17:55:54,303 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:55:54,303 INFO L168 Benchmark]: CACSL2BoogieTranslator took 633.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -157.4 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2020-10-19 17:55:54,304 INFO L168 Benchmark]: Boogie Preprocessor took 65.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:55:54,305 INFO L168 Benchmark]: RCFGBuilder took 582.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 11.5 GB. [2020-10-19 17:55:54,306 INFO L168 Benchmark]: TraceAbstraction took 4338.04 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.1 MB). Free memory was 1.1 GB in the beginning and 1000.0 MB in the end (delta: 58.1 MB). Peak memory consumption was 135.2 MB. Max. memory is 11.5 GB. [2020-10-19 17:55:54,306 INFO L168 Benchmark]: Witness Printer took 63.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1000.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:55:54,309 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 633.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -157.4 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 65.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 582.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4338.04 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.1 MB). Free memory was 1.1 GB in the beginning and 1000.0 MB in the end (delta: 58.1 MB). Peak memory consumption was 135.2 MB. Max. memory is 11.5 GB. * Witness Printer took 63.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1000.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 532]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L537] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) VAL [length=2] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L521] COND TRUE i < length - 1 [L523] nondetString[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=0, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L521] i++ VAL [i=1, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=1, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=1, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=1, length=2, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L537] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L537] char* p = build_nondet_String(); [L538] CALL cstrlen(p) VAL [s={-1:0}] [L531] const char *p = s; VAL [p={-1:0}, s={-1:0}, s={-1:0}] [L532] EXPR \read(*p) VAL [\read(*p)=-2, p={-1:0}, s={-1:0}, s={-1:0}] [L532] COND TRUE *p != '\0' [L533] p = p+2 VAL [p={-1:2}, s={-1:0}, s={-1:0}] [L532] \read(*p) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 58 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 232 SDtfs, 341 SDslu, 455 SDs, 0 SdLazy, 1200 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 51 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 11040 SizeOfPredicates, 3 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 3/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...