./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/openbsd_cstrlen-alloca-1.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 b812e7d14425eea3a24125f5e2db40eadfc6c14c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:36:25,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:36:25,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:36:25,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:36:25,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:36:25,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:36:25,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:36:25,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:36:25,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:36:25,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:36:25,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:36:25,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:36:25,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:36:25,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:36:25,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:36:25,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:36:25,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:36:25,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:36:25,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:36:25,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:36:25,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:36:25,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:36:25,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:36:25,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:36:25,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:36:25,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:36:25,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:36:25,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:36:25,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:36:25,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:36:25,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:36:26,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:36:26,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:36:26,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:36:26,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:36:26,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:36:26,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:36:26,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:36:26,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:36:26,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:36:26,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:36:26,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 16:36:26,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:36:26,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:36:26,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:36:26,038 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:36:26,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:36:26,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:36:26,040 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:36:26,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:36:26,041 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:36:26,041 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:36:26,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:36:26,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:36:26,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:36:26,042 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:36:26,042 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:36:26,042 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:36:26,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:36:26,043 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:36:26,043 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:36:26,043 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:36:26,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:36:26,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:36:26,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:36:26,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:36:26,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:36:26,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:36:26,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:36:26,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:36:26,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:36:26,044 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b812e7d14425eea3a24125f5e2db40eadfc6c14c [2021-08-30 16:36:26,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:36:26,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:36:26,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:36:26,351 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:36:26,352 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:36:26,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-08-30 16:36:26,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4513bb4/f04966bbbec04489b530ab667178b127/FLAG6aab83e71 [2021-08-30 16:36:26,823 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:36:26,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-08-30 16:36:26,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4513bb4/f04966bbbec04489b530ab667178b127/FLAG6aab83e71 [2021-08-30 16:36:26,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4513bb4/f04966bbbec04489b530ab667178b127 [2021-08-30 16:36:26,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:36:26,847 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:36:26,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:36:26,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:36:26,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:36:26,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:36:26" (1/1) ... [2021-08-30 16:36:26,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e9a96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:26, skipping insertion in model container [2021-08-30 16:36:26,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:36:26" (1/1) ... [2021-08-30 16:36:26,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:36:26,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:36:27,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:36:27,130 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:36:27,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:36:27,189 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:36:27,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27 WrapperNode [2021-08-30 16:36:27,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:36:27,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:36:27,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:36:27,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:36:27,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (1/1) ... [2021-08-30 16:36:27,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (1/1) ... [2021-08-30 16:36:27,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (1/1) ... [2021-08-30 16:36:27,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (1/1) ... [2021-08-30 16:36:27,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (1/1) ... [2021-08-30 16:36:27,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (1/1) ... [2021-08-30 16:36:27,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (1/1) ... [2021-08-30 16:36:27,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:36:27,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:36:27,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:36:27,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:36:27,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (1/1) ... [2021-08-30 16:36:27,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:36:27,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:27,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 16:36:27,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 16:36:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:36:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:36:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:36:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:36:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:36:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:36:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:36:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2021-08-30 16:36:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:36:27,292 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:36:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:36:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:36:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:36:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:36:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:36:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:36:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:36:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:36:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:36:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:36:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:36:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:36:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:36:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:36:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:36:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:36:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:36:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:36:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:36:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:36:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:36:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:36:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:36:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:36:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:36:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:36:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:36:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:36:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:36:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:36:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:36:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:36:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:36:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:36:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:36:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:36:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:36:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:36:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:36:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:36:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:36:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:36:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:36:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:36:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:36:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:36:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:36:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:36:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:36:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:36:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:36:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:36:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:36:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:36:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:36:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:36:27,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-30 16:36:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2021-08-30 16:36:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:36:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:36:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:36:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:36:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:36:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:36:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:36:27,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:36:27,603 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 16:36:27,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:36:27 BoogieIcfgContainer [2021-08-30 16:36:27,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:36:27,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:36:27,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:36:27,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:36:27,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:36:26" (1/3) ... [2021-08-30 16:36:27,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47218b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:36:27, skipping insertion in model container [2021-08-30 16:36:27,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:27" (2/3) ... [2021-08-30 16:36:27,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47218b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:36:27, skipping insertion in model container [2021-08-30 16:36:27,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:36:27" (3/3) ... [2021-08-30 16:36:27,609 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2021-08-30 16:36:27,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:36:27,613 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-30 16:36:27,639 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:36:27,644 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, mConcurrency=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 [2021-08-30 16:36:27,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-30 16:36:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.631578947368421) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:36:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:36:27,679 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:27,679 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:27,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:27,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006156, now seen corresponding path program 1 times [2021-08-30 16:36:27,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:27,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980508123] [2021-08-30 16:36:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:27,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:27,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:27,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:27,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980508123] [2021-08-30 16:36:27,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980508123] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:27,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:27,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:36:27,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632278307] [2021-08-30 16:36:27,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:36:27,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:27,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:36:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:36:27,914 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.631578947368421) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:27,996 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-08-30 16:36:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:36:27,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:36:27,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:28,002 INFO L225 Difference]: With dead ends: 31 [2021-08-30 16:36:28,003 INFO L226 Difference]: Without dead ends: 28 [2021-08-30 16:36:28,004 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.53ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:36:28,006 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.75ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:28,007 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 68 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 61.75ms Time] [2021-08-30 16:36:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-30 16:36:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-30 16:36:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-30 16:36:28,033 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2021-08-30 16:36:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:28,033 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-30 16:36:28,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-30 16:36:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:36:28,034 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:28,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:28,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:36:28,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006155, now seen corresponding path program 1 times [2021-08-30 16:36:28,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:28,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119622302] [2021-08-30 16:36:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:28,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:28,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119622302] [2021-08-30 16:36:28,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119622302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:28,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:28,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:36:28,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157963658] [2021-08-30 16:36:28,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:28,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:28,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:28,110 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:28,175 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-08-30 16:36:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:36:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:36:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:28,177 INFO L225 Difference]: With dead ends: 27 [2021-08-30 16:36:28,177 INFO L226 Difference]: Without dead ends: 27 [2021-08-30 16:36:28,177 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.20ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:28,181 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.05ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:28,182 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 10 Invalid, 56 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 46.05ms Time] [2021-08-30 16:36:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-30 16:36:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-30 16:36:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-30 16:36:28,190 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-08-30 16:36:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:28,191 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-30 16:36:28,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-30 16:36:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:36:28,191 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:28,192 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:28,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:36:28,192 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006102, now seen corresponding path program 1 times [2021-08-30 16:36:28,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:28,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486117053] [2021-08-30 16:36:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:28,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:28,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486117053] [2021-08-30 16:36:28,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486117053] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:28,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:28,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:36:28,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008344639] [2021-08-30 16:36:28,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:28,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:28,248 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:28,303 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-08-30 16:36:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:36:28,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:36:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:28,305 INFO L225 Difference]: With dead ends: 34 [2021-08-30 16:36:28,305 INFO L226 Difference]: Without dead ends: 34 [2021-08-30 16:36:28,306 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.72ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:28,306 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.47ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:28,307 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 36.47ms Time] [2021-08-30 16:36:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-30 16:36:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-08-30 16:36:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-08-30 16:36:28,312 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2021-08-30 16:36:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:28,312 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-08-30 16:36:28,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-08-30 16:36:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:36:28,313 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:28,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:28,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:36:28,313 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2094946520, now seen corresponding path program 1 times [2021-08-30 16:36:28,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:28,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013720505] [2021-08-30 16:36:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:28,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:28,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013720505] [2021-08-30 16:36:28,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013720505] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:28,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:28,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:36:28,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140447510] [2021-08-30 16:36:28,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:36:28,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:36:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:28,405 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:28,479 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-08-30 16:36:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:36:28,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:36:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:28,481 INFO L225 Difference]: With dead ends: 38 [2021-08-30 16:36:28,481 INFO L226 Difference]: Without dead ends: 38 [2021-08-30 16:36:28,482 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.73ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:36:28,487 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.77ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:28,489 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 15 Invalid, 94 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 61.77ms Time] [2021-08-30 16:36:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-30 16:36:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-08-30 16:36:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:28,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-08-30 16:36:28,496 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2021-08-30 16:36:28,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:28,497 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-08-30 16:36:28,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-08-30 16:36:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:36:28,498 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:28,498 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:28,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:36:28,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrlenErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2136386996, now seen corresponding path program 1 times [2021-08-30 16:36:28,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:28,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80173877] [2021-08-30 16:36:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:28,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:28,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80173877] [2021-08-30 16:36:28,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80173877] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:28,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:28,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:36:28,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638617921] [2021-08-30 16:36:28,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:36:28,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:36:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:28,547 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:28,613 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-08-30 16:36:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:36:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-30 16:36:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:28,614 INFO L225 Difference]: With dead ends: 30 [2021-08-30 16:36:28,614 INFO L226 Difference]: Without dead ends: 30 [2021-08-30 16:36:28,614 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.85ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:36:28,615 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.96ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:28,615 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 92 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 43.96ms Time] [2021-08-30 16:36:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-30 16:36:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-30 16:36:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-08-30 16:36:28,618 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2021-08-30 16:36:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:28,618 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-08-30 16:36:28,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-08-30 16:36:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:36:28,618 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:28,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:28,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 16:36:28,619 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2136386997, now seen corresponding path program 1 times [2021-08-30 16:36:28,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:28,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026632244] [2021-08-30 16:36:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:28,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:28,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026632244] [2021-08-30 16:36:28,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026632244] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:28,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:28,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 16:36:28,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058024876] [2021-08-30 16:36:28,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:36:28,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:36:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:36:28,685 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:28,781 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-08-30 16:36:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:36:28,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-30 16:36:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:28,786 INFO L225 Difference]: With dead ends: 36 [2021-08-30 16:36:28,786 INFO L226 Difference]: Without dead ends: 36 [2021-08-30 16:36:28,787 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 58.78ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-30 16:36:28,788 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.32ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:28,790 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 113 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 61.32ms Time] [2021-08-30 16:36:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-30 16:36:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-08-30 16:36:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-08-30 16:36:28,798 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 13 [2021-08-30 16:36:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:28,798 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-08-30 16:36:28,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-08-30 16:36:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-30 16:36:28,799 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:28,805 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:28,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 16:36:28,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1041914347, now seen corresponding path program 1 times [2021-08-30 16:36:28,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:28,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789607345] [2021-08-30 16:36:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:28,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:28,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789607345] [2021-08-30 16:36:28,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789607345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:28,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492090026] [2021-08-30 16:36:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:28,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:28,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:28,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:36:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 16:36:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:29,061 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 [2021-08-30 16:36:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:29,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:29,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492090026] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:29,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:29,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-08-30 16:36:29,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316916971] [2021-08-30 16:36:29,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:36:29,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:36:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:36:29,336 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-08-30 16:36:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:29,464 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-08-30 16:36:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:36:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-30 16:36:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:29,467 INFO L225 Difference]: With dead ends: 43 [2021-08-30 16:36:29,467 INFO L226 Difference]: Without dead ends: 43 [2021-08-30 16:36:29,467 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.42ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:36:29,468 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.85ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:29,468 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 22 Invalid, 190 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [18 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 89.85ms Time] [2021-08-30 16:36:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-30 16:36:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2021-08-30 16:36:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-30 16:36:29,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-08-30 16:36:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:29,477 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-30 16:36:29,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-08-30 16:36:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-30 16:36:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 16:36:29,478 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:29,478 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:29,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-30 16:36:29,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:29,685 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2015340679, now seen corresponding path program 1 times [2021-08-30 16:36:29,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:29,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204765865] [2021-08-30 16:36:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:29,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:29,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:29,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204765865] [2021-08-30 16:36:29,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204765865] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:29,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:29,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 16:36:29,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917995336] [2021-08-30 16:36:29,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 16:36:29,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:29,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 16:36:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:36:29,766 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:29,882 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-08-30 16:36:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:36:29,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-30 16:36:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:29,884 INFO L225 Difference]: With dead ends: 39 [2021-08-30 16:36:29,884 INFO L226 Difference]: Without dead ends: 39 [2021-08-30 16:36:29,884 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 65.01ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:36:29,885 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.20ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:29,885 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 162 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [10 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 67.20ms Time] [2021-08-30 16:36:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-30 16:36:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-08-30 16:36:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:36:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-08-30 16:36:29,894 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 16 [2021-08-30 16:36:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:29,894 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-08-30 16:36:29,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-08-30 16:36:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 16:36:29,895 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:29,895 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:29,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 16:36:29,896 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:29,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1886599607, now seen corresponding path program 1 times [2021-08-30 16:36:29,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:29,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937353920] [2021-08-30 16:36:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:29,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:29,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:29,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:29,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937353920] [2021-08-30 16:36:29,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937353920] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:29,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:29,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-30 16:36:29,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574551192] [2021-08-30 16:36:29,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:36:29,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:36:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:36:29,988 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:30,105 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-08-30 16:36:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 16:36:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-30 16:36:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:30,106 INFO L225 Difference]: With dead ends: 51 [2021-08-30 16:36:30,106 INFO L226 Difference]: Without dead ends: 51 [2021-08-30 16:36:30,106 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 71.23ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-30 16:36:30,108 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.52ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:30,108 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 27 Invalid, 169 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [13 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 68.52ms Time] [2021-08-30 16:36:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-30 16:36:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-08-30 16:36:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:36:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-08-30 16:36:30,117 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 16 [2021-08-30 16:36:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:30,118 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-08-30 16:36:30,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-08-30 16:36:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 16:36:30,118 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:30,119 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:30,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 16:36:30,119 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:30,120 INFO L82 PathProgramCache]: Analyzing trace with hash 280521542, now seen corresponding path program 1 times [2021-08-30 16:36:30,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:30,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552479604] [2021-08-30 16:36:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:30,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:30,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:30,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-30 16:36:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:30,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:30,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552479604] [2021-08-30 16:36:30,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552479604] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:30,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:30,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:36:30,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952817381] [2021-08-30 16:36:30,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:30,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:30,206 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:30,234 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-08-30 16:36:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:36:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-08-30 16:36:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:30,235 INFO L225 Difference]: With dead ends: 36 [2021-08-30 16:36:30,235 INFO L226 Difference]: Without dead ends: 21 [2021-08-30 16:36:30,235 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.76ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:30,236 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.38ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.42ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:30,236 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.38ms Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 26.42ms Time] [2021-08-30 16:36:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-30 16:36:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-30 16:36:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-30 16:36:30,237 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-08-30 16:36:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:30,237 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-30 16:36:30,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-30 16:36:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 16:36:30,238 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:30,238 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:30,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 16:36:30,238 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1912442426, now seen corresponding path program 1 times [2021-08-30 16:36:30,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:30,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049439616] [2021-08-30 16:36:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:30,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:30,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:30,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:30,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049439616] [2021-08-30 16:36:30,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049439616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:30,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921762628] [2021-08-30 16:36:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:30,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:30,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:30,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:30,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 16:36:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:30,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-30 16:36:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:30,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:30,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:36:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:30,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921762628] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:30,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:30,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-08-30 16:36:30,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757311742] [2021-08-30 16:36:30,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-30 16:36:30,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:30,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-30 16:36:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-30 16:36:30,707 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:30,839 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-30 16:36:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:36:30,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-30 16:36:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:30,840 INFO L225 Difference]: With dead ends: 29 [2021-08-30 16:36:30,840 INFO L226 Difference]: Without dead ends: 29 [2021-08-30 16:36:30,840 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 212.85ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-08-30 16:36:30,841 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.13ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:30,841 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 28 Invalid, 164 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [27 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 65.13ms Time] [2021-08-30 16:36:30,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-30 16:36:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-08-30 16:36:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-30 16:36:30,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-08-30 16:36:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:30,842 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-30 16:36:30,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-30 16:36:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 16:36:30,843 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:30,843 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:30,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:31,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-30 16:36:31,045 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:31,045 INFO L82 PathProgramCache]: Analyzing trace with hash 831122644, now seen corresponding path program 2 times [2021-08-30 16:36:31,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:31,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632540802] [2021-08-30 16:36:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:31,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:31,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:31,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:31,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632540802] [2021-08-30 16:36:31,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632540802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:31,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700374904] [2021-08-30 16:36:31,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:36:31,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:31,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:31,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:31,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 16:36:31,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:36:31,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:31,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-30 16:36:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:31,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-30 16:36:31,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:36:31,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-30 16:36:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:31,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:32,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-08-30 16:36:32,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-08-30 16:36:32,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-08-30 16:36:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:32,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700374904] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:32,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:32,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2021-08-30 16:36:32,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243707990] [2021-08-30 16:36:32,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-30 16:36:32,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:32,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-30 16:36:32,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-08-30 16:36:32,057 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 30 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:32,403 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-08-30 16:36:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-30 16:36:32,403 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-08-30 16:36:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:32,403 INFO L225 Difference]: With dead ends: 44 [2021-08-30 16:36:32,403 INFO L226 Difference]: Without dead ends: 36 [2021-08-30 16:36:32,404 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 677.14ms TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-08-30 16:36:32,404 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 85.56ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:32,405 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 51 Invalid, 331 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [12 Valid, 219 Invalid, 0 Unknown, 100 Unchecked, 85.56ms Time] [2021-08-30 16:36:32,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-30 16:36:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-08-30 16:36:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-08-30 16:36:32,406 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2021-08-30 16:36:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:32,406 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-08-30 16:36:32,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-08-30 16:36:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 16:36:32,407 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:32,407 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:32,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:32,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:32,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash 976723133, now seen corresponding path program 3 times [2021-08-30 16:36:32,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:32,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122626575] [2021-08-30 16:36:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:32,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:32,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:32,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122626575] [2021-08-30 16:36:32,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122626575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:32,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773122511] [2021-08-30 16:36:32,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:36:32,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:32,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:32,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:32,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 16:36:32,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-30 16:36:32,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-30 16:36:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:32,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:36:33,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 16:36:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:36:33,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:36:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:33,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773122511] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:33,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:33,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2021-08-30 16:36:33,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211151864] [2021-08-30 16:36:33,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-30 16:36:33,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-30 16:36:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-08-30 16:36:33,295 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 27 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:33,570 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-08-30 16:36:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 16:36:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-08-30 16:36:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:33,571 INFO L225 Difference]: With dead ends: 49 [2021-08-30 16:36:33,571 INFO L226 Difference]: Without dead ends: 38 [2021-08-30 16:36:33,572 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 417.39ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:36:33,572 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 141.18ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:33,572 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 416 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [11 Valid, 380 Invalid, 0 Unknown, 25 Unchecked, 141.18ms Time] [2021-08-30 16:36:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-30 16:36:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-08-30 16:36:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-08-30 16:36:33,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2021-08-30 16:36:33,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:33,574 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-08-30 16:36:33,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-08-30 16:36:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 16:36:33,574 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:33,575 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:33,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:33,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:33,781 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1134145536, now seen corresponding path program 4 times [2021-08-30 16:36:33,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:33,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007323029] [2021-08-30 16:36:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:33,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:33,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:33,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007323029] [2021-08-30 16:36:33,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007323029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:33,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011075053] [2021-08-30 16:36:33,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:36:33,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:33,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:33,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:33,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 16:36:33,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:36:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:33,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-30 16:36:33,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:34,012 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 [2021-08-30 16:36:34,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-30 16:36:34,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:36:34,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-30 16:36:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:34,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:34,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-08-30 16:36:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-08-30 16:36:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:35,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011075053] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:35,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:35,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 36 [2021-08-30 16:36:35,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092842113] [2021-08-30 16:36:35,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-30 16:36:35,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:35,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-30 16:36:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-08-30 16:36:35,167 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 37 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:35,774 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-08-30 16:36:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 16:36:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-08-30 16:36:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:35,775 INFO L225 Difference]: With dead ends: 43 [2021-08-30 16:36:35,775 INFO L226 Difference]: Without dead ends: 43 [2021-08-30 16:36:35,776 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 966.34ms TimeCoverageRelationStatistics Valid=299, Invalid=2151, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:36:35,776 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 67 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.96ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 238.88ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:35,776 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 68 Invalid, 685 Unknown, 0 Unchecked, 2.96ms Time], IncrementalHoareTripleChecker [30 Valid, 589 Invalid, 0 Unknown, 66 Unchecked, 238.88ms Time] [2021-08-30 16:36:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-30 16:36:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-08-30 16:36:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-08-30 16:36:35,778 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 34 [2021-08-30 16:36:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:35,778 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-08-30 16:36:35,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-08-30 16:36:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-30 16:36:35,779 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:35,779 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:35,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:35,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-30 16:36:35,979 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:35,980 INFO L82 PathProgramCache]: Analyzing trace with hash 983868736, now seen corresponding path program 5 times [2021-08-30 16:36:35,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:35,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292072099] [2021-08-30 16:36:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:35,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:36,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:36,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292072099] [2021-08-30 16:36:36,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292072099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:36,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991884332] [2021-08-30 16:36:36,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:36:36,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:36,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:36,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:36,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 16:36:36,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-30 16:36:36,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:36,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-30 16:36:36,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:36,217 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 [2021-08-30 16:36:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:36,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:36,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991884332] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:36,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:36,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 33 [2021-08-30 16:36:36,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896892701] [2021-08-30 16:36:36,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-30 16:36:36,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-30 16:36:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 16:36:36,769 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 33 states, 32 states have (on average 2.65625) internal successors, (85), 29 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:37,006 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-08-30 16:36:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 16:36:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.65625) internal successors, (85), 29 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-08-30 16:36:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:37,007 INFO L225 Difference]: With dead ends: 64 [2021-08-30 16:36:37,007 INFO L226 Difference]: Without dead ends: 48 [2021-08-30 16:36:37,007 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 443.67ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-08-30 16:36:37,008 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 49 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.55ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:37,008 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 38 Invalid, 334 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [15 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 129.55ms Time] [2021-08-30 16:36:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-30 16:36:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-08-30 16:36:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-30 16:36:37,009 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-08-30 16:36:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:37,009 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-30 16:36:37,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.65625) internal successors, (85), 29 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-30 16:36:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-30 16:36:37,010 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:37,010 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:37,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:37,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-30 16:36:37,212 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1009410243, now seen corresponding path program 6 times [2021-08-30 16:36:37,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:37,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984231243] [2021-08-30 16:36:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:37,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:37,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:37,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984231243] [2021-08-30 16:36:37,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984231243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:37,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480784947] [2021-08-30 16:36:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:36:37,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:37,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:37,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:37,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 16:36:37,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-30 16:36:37,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-30 16:36:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:36:37,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 16:36:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:37,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:37,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:36:37,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:36:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:38,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480784947] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:38,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:38,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2021-08-30 16:36:38,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387839526] [2021-08-30 16:36:38,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-30 16:36:38,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-30 16:36:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 16:36:38,052 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 33 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:38,565 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-08-30 16:36:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-30 16:36:38,566 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-08-30 16:36:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:38,566 INFO L225 Difference]: With dead ends: 69 [2021-08-30 16:36:38,566 INFO L226 Difference]: Without dead ends: 52 [2021-08-30 16:36:38,567 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 615.23ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 16:36:38,567 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 228.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.71ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:38,567 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 70 Invalid, 778 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [19 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 286.71ms Time] [2021-08-30 16:36:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-30 16:36:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-08-30 16:36:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-08-30 16:36:38,569 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2021-08-30 16:36:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:38,570 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-08-30 16:36:38,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-08-30 16:36:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-30 16:36:38,571 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:38,571 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:38,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:38,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:38,781 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1167106758, now seen corresponding path program 7 times [2021-08-30 16:36:38,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:38,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345975280] [2021-08-30 16:36:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:38,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:38,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:38,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:38,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345975280] [2021-08-30 16:36:38,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345975280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:38,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303182816] [2021-08-30 16:36:38,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:36:38,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:38,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:38,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:38,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 16:36:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-30 16:36:39,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:39,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:39,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:36:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:39,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303182816] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:39,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:39,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-08-30 16:36:39,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463068761] [2021-08-30 16:36:39,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-30 16:36:39,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-30 16:36:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:36:39,585 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 36 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:39,983 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-08-30 16:36:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 16:36:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-08-30 16:36:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:39,984 INFO L225 Difference]: With dead ends: 54 [2021-08-30 16:36:39,984 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 16:36:39,984 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 506.64ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-08-30 16:36:39,984 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 104 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 199.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.96ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:39,985 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 61 Invalid, 802 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [41 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 252.96ms Time] [2021-08-30 16:36:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 16:36:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-08-30 16:36:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-08-30 16:36:39,986 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2021-08-30 16:36:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:39,987 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-08-30 16:36:39,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-08-30 16:36:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-30 16:36:39,987 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:39,987 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:40,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:40,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-30 16:36:40,196 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1517157576, now seen corresponding path program 8 times [2021-08-30 16:36:40,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:40,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266463766] [2021-08-30 16:36:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:40,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:40,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:40,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:40,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266463766] [2021-08-30 16:36:40,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266463766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:40,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452370499] [2021-08-30 16:36:40,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:36:40,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:40,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:40,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:40,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 16:36:40,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:36:40,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-30 16:36:40,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:40,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-30 16:36:41,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:36:41,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-30 16:36:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:42,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-08-30 16:36:42,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-08-30 16:36:42,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-08-30 16:36:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452370499] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:42,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:42,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 50 [2021-08-30 16:36:42,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604942781] [2021-08-30 16:36:42,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-30 16:36:42,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-30 16:36:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:36:42,087 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 50 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:42,883 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-08-30 16:36:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-30 16:36:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-30 16:36:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:42,884 INFO L225 Difference]: With dead ends: 84 [2021-08-30 16:36:42,884 INFO L226 Difference]: Without dead ends: 64 [2021-08-30 16:36:42,885 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1490.50ms TimeCoverageRelationStatistics Valid=354, Invalid=4068, Unknown=0, NotChecked=0, Total=4422 [2021-08-30 16:36:42,886 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.51ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 230.94ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:42,886 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 68 Invalid, 868 Unknown, 0 Unchecked, 2.51ms Time], IncrementalHoareTripleChecker [17 Valid, 700 Invalid, 0 Unknown, 151 Unchecked, 230.94ms Time] [2021-08-30 16:36:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-30 16:36:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-08-30 16:36:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-08-30 16:36:42,888 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 51 [2021-08-30 16:36:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:42,888 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-08-30 16:36:42,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-08-30 16:36:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-30 16:36:42,890 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:42,891 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:42,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-30 16:36:43,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-30 16:36:43,096 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-30 16:36:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:43,096 INFO L82 PathProgramCache]: Analyzing trace with hash 470099401, now seen corresponding path program 9 times [2021-08-30 16:36:43,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:43,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559581417] [2021-08-30 16:36:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:43,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:43,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:43,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559581417] [2021-08-30 16:36:43,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559581417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:43,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570038591] [2021-08-30 16:36:43,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:36:43,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:43,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:43,360 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:43,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 16:36:43,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-30 16:36:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-30 16:36:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:43,470 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 [2021-08-30 16:36:43,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-30 16:36:43,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:36:43,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-08-30 16:36:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-08-30 16:36:43,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:44,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-08-30 16:36:44,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-08-30 16:36:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-08-30 16:36:44,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570038591] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:44,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:44,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8, 8] total 36 [2021-08-30 16:36:44,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879072413] [2021-08-30 16:36:44,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-30 16:36:44,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-30 16:36:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:36:44,513 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 36 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:45,623 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-08-30 16:36:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-30 16:36:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-08-30 16:36:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:45,624 INFO L225 Difference]: With dead ends: 88 [2021-08-30 16:36:45,624 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 16:36:45,625 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1361.77ms TimeCoverageRelationStatistics Valid=377, Invalid=4593, Unknown=0, NotChecked=0, Total=4970 [2021-08-30 16:36:45,625 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 199.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 248.70ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:45,626 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 98 Invalid, 870 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [3 Valid, 728 Invalid, 0 Unknown, 139 Unchecked, 248.70ms Time] [2021-08-30 16:36:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 16:36:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 16:36:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-30 16:36:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 16:36:45,626 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2021-08-30 16:36:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:45,627 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 16:36:45,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 16:36:45,627 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 16:36:45,629 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-08-30 16:36:45,629 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-08-30 16:36:45,630 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-08-30 16:36:45,630 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-08-30 16:36:45,630 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2021-08-30 16:36:45,630 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr0REQUIRES_VIOLATION (1 of 7 remaining) [2021-08-30 16:36:45,630 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr1REQUIRES_VIOLATION (0 of 7 remaining) [2021-08-30 16:36:45,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:45,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:45,835 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:36:45,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:36:45 BoogieIcfgContainer [2021-08-30 16:36:45,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:36:45,838 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:36:45,838 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:36:45,838 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:36:45,838 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:36:27" (3/4) ... [2021-08-30 16:36:45,841 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 16:36:45,846 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 16:36:45,846 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-30 16:36:45,847 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-30 16:36:45,847 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-30 16:36:45,847 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-30 16:36:45,847 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2021-08-30 16:36:45,847 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 16:36:45,847 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-30 16:36:45,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-08-30 16:36:45,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-30 16:36:45,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:36:45,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:36:45,889 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:36:45,889 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:36:45,890 INFO L158 Benchmark]: Toolchain (without parser) took 19042.80ms. Allocated memory was 52.4MB in the beginning and 111.1MB in the end (delta: 58.7MB). Free memory was 28.7MB in the beginning and 40.3MB in the end (delta: -11.6MB). Peak memory consumption was 47.5MB. Max. memory is 16.1GB. [2021-08-30 16:36:45,890 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 52.4MB. Free memory is still 34.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:36:45,891 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.38ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 28.6MB in the beginning and 40.8MB in the end (delta: -12.2MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2021-08-30 16:36:45,891 INFO L158 Benchmark]: Boogie Preprocessor took 39.75ms. Allocated memory is still 62.9MB. Free memory was 40.8MB in the beginning and 38.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:36:45,891 INFO L158 Benchmark]: RCFGBuilder took 372.65ms. Allocated memory is still 62.9MB. Free memory was 38.4MB in the beginning and 34.1MB in the end (delta: 4.2MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2021-08-30 16:36:45,895 INFO L158 Benchmark]: TraceAbstraction took 18232.19ms. Allocated memory was 62.9MB in the beginning and 111.1MB in the end (delta: 48.2MB). Free memory was 33.6MB in the beginning and 43.5MB in the end (delta: -9.8MB). Peak memory consumption was 37.0MB. Max. memory is 16.1GB. [2021-08-30 16:36:45,895 INFO L158 Benchmark]: Witness Printer took 51.67ms. Allocated memory is still 111.1MB. Free memory was 43.5MB in the beginning and 40.3MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:36:45,897 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 52.4MB. Free memory is still 34.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.38ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 28.6MB in the beginning and 40.8MB in the end (delta: -12.2MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.75ms. Allocated memory is still 62.9MB. Free memory was 40.8MB in the beginning and 38.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 372.65ms. Allocated memory is still 62.9MB. Free memory was 38.4MB in the beginning and 34.1MB in the end (delta: 4.2MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. * TraceAbstraction took 18232.19ms. Allocated memory was 62.9MB in the beginning and 111.1MB in the end (delta: 48.2MB). Free memory was 33.6MB in the beginning and 43.5MB in the end (delta: -9.8MB). Peak memory consumption was 37.0MB. Max. memory is 16.1GB. * Witness Printer took 51.67ms. Allocated memory is still 111.1MB. Free memory was 43.5MB in the beginning and 40.3MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 18196.52ms, OverallIterations: 19, TraceHistogramMax: 7, EmptinessCheckTime: 28.73ms, AutomataDifference: 5359.93ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 13.02ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 807 SdHoareTripleChecker+Valid, 2242.91ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 797 mSDsluCounter, 702 SdHoareTripleChecker+Invalid, 1818.17ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 481 IncrementalHoareTripleChecker+Unchecked, 1419 mSDsCounter, 257 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5584 IncrementalHoareTripleChecker+Invalid, 6322 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 257 mSolverCounterUnsat, 89 mSDtfsCounter, 5584 mSolverCounterSat, 34.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1087 GetRequests, 595 SyntacticMatches, 18 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 7117.74ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=18, InterpolantAutomatonStates: 260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 78.77ms AutomataMinimizationTime, 19 MinimizatonAttempts, 77 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 71.99ms SsaConstructionTime, 330.70ms SatisfiabilityAnalysisTime, 9365.17ms InterpolantComputationTime, 841 NumberOfCodeBlocks, 837 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1164 ConstructedInterpolants, 82 QuantifiedInterpolants, 10343 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1398 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 39 InterpolantComputations, 9 PerfectInterpolantSequences, 552/1442 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 16:36:45,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...