./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/cstrncmp-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 2d5a995d825785bc5dc95f3825623b1e4ecd07fe ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:41:58,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:41:58,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:41:58,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:41:58,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:41:58,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:41:58,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:41:58,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:41:58,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:41:58,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:41:58,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:41:58,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:41:58,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:41:58,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:41:58,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:41:58,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:41:58,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:41:58,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:41:58,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:41:58,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:41:58,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:41:58,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:41:58,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:41:58,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:41:58,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:41:58,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:41:58,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:41:58,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:41:58,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:41:58,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:41:58,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:41:58,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:41:58,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:41:58,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:41:58,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:41:58,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:41:58,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:41:58,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:41:58,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:41:58,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:41:58,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:41:58,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:41:58,965 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:41:58,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:41:58,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:41:58,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:41:58,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:41:58,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:41:58,969 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:41:58,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:41:58,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:41:58,970 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:41:58,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:41:58,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:41:58,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:41:58,971 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:41:58,971 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:41:58,972 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:41:58,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:41:58,983 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:41:58,983 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:41:58,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:41:58,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:41:58,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:41:58,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:41:58,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:58,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:41:58,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:41:58,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:41:58,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:41:58,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:41:58,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d5a995d825785bc5dc95f3825623b1e4ecd07fe [2021-08-27 04:41:59,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:41:59,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:41:59,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:41:59,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:41:59,331 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:41:59,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-08-27 04:41:59,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f565ed54/0f748e7c54494249bf764ff81761859f/FLAGd5049e332 [2021-08-27 04:41:59,950 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:41:59,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-08-27 04:41:59,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f565ed54/0f748e7c54494249bf764ff81761859f/FLAGd5049e332 [2021-08-27 04:42:00,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f565ed54/0f748e7c54494249bf764ff81761859f [2021-08-27 04:42:00,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:42:00,371 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:42:00,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:42:00,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:42:00,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:42:00,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4983bd08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00, skipping insertion in model container [2021-08-27 04:42:00,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:42:00,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:42:00,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:42:00,732 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:42:00,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:42:00,814 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:42:00,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00 WrapperNode [2021-08-27 04:42:00,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:42:00,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:42:00,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:42:00,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:42:00,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:42:00,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:42:00,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:42:00,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:42:00,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (1/1) ... [2021-08-27 04:42:00,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:42:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:00,903 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) [2021-08-27 04:42:00,904 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 [2021-08-27 04:42:00,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:42:00,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:42:00,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:42:00,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:42:00,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:42:00,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:42:00,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:42:00,938 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncmp [2021-08-27 04:42:00,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:42:00,939 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:42:00,939 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:42:00,939 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:42:00,939 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:42:00,939 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:42:00,940 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:42:00,940 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:42:00,940 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:42:00,940 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:42:00,940 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:42:00,940 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:42:00,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:42:00,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:42:00,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:42:00,941 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:42:00,941 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:42:00,941 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:42:00,941 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:42:00,942 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:42:00,942 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:42:00,942 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:42:00,942 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:42:00,942 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:42:00,942 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:42:00,942 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:42:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:42:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:42:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:42:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:42:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:42:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:42:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:42:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:42:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:42:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:42:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:42:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:42:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:42:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:42:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:42:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:42:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:42:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:42:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:42:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:42:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:42:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:42:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:42:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:42:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:42:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:42:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:42:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:42:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:42:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:42:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:42:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:42:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:42:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:42:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:42:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:42:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:42:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:42:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:42:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:42:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:42:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:42:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:42:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:42:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:42:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:42:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:42:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:42:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:42:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:42:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:42:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:42:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:42:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:42:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:42:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:42:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:42:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:42:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:42:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:42:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:42:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:42:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:42:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:42:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:42:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:42:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:42:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:42:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:42:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncmp [2021-08-27 04:42:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:42:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:42:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:42:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:42:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:42:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:42:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:42:01,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:42:01,502 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 04:42:01,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:42:01 BoogieIcfgContainer [2021-08-27 04:42:01,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:42:01,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:42:01,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:42:01,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:42:01,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:42:00" (1/3) ... [2021-08-27 04:42:01,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3560838f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:42:01, skipping insertion in model container [2021-08-27 04:42:01,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:00" (2/3) ... [2021-08-27 04:42:01,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3560838f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:42:01, skipping insertion in model container [2021-08-27 04:42:01,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:42:01" (3/3) ... [2021-08-27 04:42:01,516 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2021-08-27 04:42:01,525 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:42:01,525 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-27 04:42:01,570 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:42:01,577 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 [2021-08-27 04:42:01,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-27 04:42:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 40 states have (on average 1.8) internal successors, (72), 59 states have internal predecessors, (72), 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) [2021-08-27 04:42:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:42:01,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:01,602 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:01,603 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1980189205, now seen corresponding path program 1 times [2021-08-27 04:42:01,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:01,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183405198] [2021-08-27 04:42:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:01,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:01,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:01,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:01,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183405198] [2021-08-27 04:42:01,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183405198] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:01,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:01,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:01,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886063875] [2021-08-27 04:42:01,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:01,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:01,882 INFO L87 Difference]: Start difference. First operand has 66 states, 40 states have (on average 1.8) internal successors, (72), 59 states have internal predecessors, (72), 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 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-27 04:42:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:02,122 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2021-08-27 04:42:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:02,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-08-27 04:42:02,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:02,132 INFO L225 Difference]: With dead ends: 88 [2021-08-27 04:42:02,132 INFO L226 Difference]: Without dead ends: 84 [2021-08-27 04:42:02,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:42:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-27 04:42:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-08-27 04:42:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 60 states have internal predecessors, (71), 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) [2021-08-27 04:42:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-08-27 04:42:02,177 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 11 [2021-08-27 04:42:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:02,177 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-08-27 04:42:02,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-27 04:42:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-08-27 04:42:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:42:02,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:02,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:02,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:42:02,179 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1982036247, now seen corresponding path program 1 times [2021-08-27 04:42:02,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:02,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189025215] [2021-08-27 04:42:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:02,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:02,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:02,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189025215] [2021-08-27 04:42:02,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189025215] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:02,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:02,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:02,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992822413] [2021-08-27 04:42:02,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:02,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:02,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:02,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:02,341 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-27 04:42:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:02,506 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-08-27 04:42:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:42:02,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-08-27 04:42:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:02,507 INFO L225 Difference]: With dead ends: 89 [2021-08-27 04:42:02,508 INFO L226 Difference]: Without dead ends: 89 [2021-08-27 04:42:02,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-27 04:42:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2021-08-27 04:42:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 62 states have internal predecessors, (75), 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) [2021-08-27 04:42:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-08-27 04:42:02,521 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 11 [2021-08-27 04:42:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:02,521 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-08-27 04:42:02,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-27 04:42:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-08-27 04:42:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:42:02,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:02,523 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:02,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:42:02,523 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1982036246, now seen corresponding path program 1 times [2021-08-27 04:42:02,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:02,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37252710] [2021-08-27 04:42:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:02,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:02,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:02,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37252710] [2021-08-27 04:42:02,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37252710] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:02,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:02,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:42:02,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407958141] [2021-08-27 04:42:02,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:42:02,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:42:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:02,590 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-08-27 04:42:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:02,708 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-08-27 04:42:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-08-27 04:42:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:02,712 INFO L225 Difference]: With dead ends: 66 [2021-08-27 04:42:02,712 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 04:42:02,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 04:42:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-27 04:42:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 60 states have internal predecessors, (72), 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) [2021-08-27 04:42:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-08-27 04:42:02,725 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 11 [2021-08-27 04:42:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:02,725 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-08-27 04:42:02,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-08-27 04:42:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-08-27 04:42:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:42:02,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:02,727 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:02,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:42:02,727 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:02,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:02,728 INFO L82 PathProgramCache]: Analyzing trace with hash 291262476, now seen corresponding path program 1 times [2021-08-27 04:42:02,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:02,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139970061] [2021-08-27 04:42:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:02,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:02,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:02,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139970061] [2021-08-27 04:42:02,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139970061] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:02,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:02,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:02,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90942748] [2021-08-27 04:42:02,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:02,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:02,833 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-08-27 04:42:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:02,944 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-08-27 04:42:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:42:02,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-08-27 04:42:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:02,946 INFO L225 Difference]: With dead ends: 65 [2021-08-27 04:42:02,946 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 04:42:02,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 04:42:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-08-27 04:42:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 59 states have internal predecessors, (71), 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) [2021-08-27 04:42:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2021-08-27 04:42:02,962 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 13 [2021-08-27 04:42:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:02,962 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2021-08-27 04:42:02,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-08-27 04:42:02,962 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2021-08-27 04:42:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:42:02,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:02,963 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:02,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:42:02,963 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash 291262528, now seen corresponding path program 1 times [2021-08-27 04:42:02,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:02,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962001788] [2021-08-27 04:42:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:02,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:03,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:03,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962001788] [2021-08-27 04:42:03,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962001788] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:03,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:03,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:03,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408991779] [2021-08-27 04:42:03,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:03,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:03,040 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-08-27 04:42:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:03,178 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-08-27 04:42:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-08-27 04:42:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:03,180 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:42:03,180 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 04:42:03,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 04:42:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-08-27 04:42:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 70 states have internal predecessors, (85), 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) [2021-08-27 04:42:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2021-08-27 04:42:03,190 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 13 [2021-08-27 04:42:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:03,190 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2021-08-27 04:42:03,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-08-27 04:42:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2021-08-27 04:42:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:42:03,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:03,191 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:03,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:42:03,192 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash 348520830, now seen corresponding path program 1 times [2021-08-27 04:42:03,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:03,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610532573] [2021-08-27 04:42:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:03,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:03,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:03,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610532573] [2021-08-27 04:42:03,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610532573] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:03,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:03,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:42:03,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987361532] [2021-08-27 04:42:03,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:42:03,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:42:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:03,257 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-08-27 04:42:03,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:03,353 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-08-27 04:42:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:03,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2021-08-27 04:42:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:03,354 INFO L225 Difference]: With dead ends: 74 [2021-08-27 04:42:03,354 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 04:42:03,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 04:42:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-08-27 04:42:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.509090909090909) internal successors, (83), 68 states have internal predecessors, (83), 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) [2021-08-27 04:42:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-08-27 04:42:03,358 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 13 [2021-08-27 04:42:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:03,358 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-08-27 04:42:03,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-08-27 04:42:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-08-27 04:42:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:42:03,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:03,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:03,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:42:03,359 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:03,360 INFO L82 PathProgramCache]: Analyzing trace with hash 348520831, now seen corresponding path program 1 times [2021-08-27 04:42:03,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:03,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778950621] [2021-08-27 04:42:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:03,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:03,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:03,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778950621] [2021-08-27 04:42:03,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778950621] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:03,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:03,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:03,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766483486] [2021-08-27 04:42:03,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:42:03,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:42:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:03,435 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-08-27 04:42:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:03,606 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2021-08-27 04:42:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2021-08-27 04:42:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:03,607 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:42:03,607 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 04:42:03,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:42:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 04:42:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-08-27 04:42:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 70 states have internal predecessors, (86), 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) [2021-08-27 04:42:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2021-08-27 04:42:03,611 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 13 [2021-08-27 04:42:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:03,611 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2021-08-27 04:42:03,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-08-27 04:42:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2021-08-27 04:42:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:42:03,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:03,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:03,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:42:03,612 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash 439202164, now seen corresponding path program 1 times [2021-08-27 04:42:03,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:03,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900201933] [2021-08-27 04:42:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:03,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:03,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:03,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900201933] [2021-08-27 04:42:03,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900201933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:03,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:03,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:03,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256188053] [2021-08-27 04:42:03,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:03,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:03,659 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-08-27 04:42:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:03,764 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2021-08-27 04:42:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:42:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-08-27 04:42:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:03,766 INFO L225 Difference]: With dead ends: 75 [2021-08-27 04:42:03,766 INFO L226 Difference]: Without dead ends: 75 [2021-08-27 04:42:03,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-27 04:42:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-27 04:42:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 69 states have internal predecessors, (85), 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) [2021-08-27 04:42:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-08-27 04:42:03,775 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 14 [2021-08-27 04:42:03,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:03,776 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-08-27 04:42:03,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-08-27 04:42:03,777 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-08-27 04:42:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:42:03,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:03,780 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:03,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:42:03,781 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1458990554, now seen corresponding path program 1 times [2021-08-27 04:42:03,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:03,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256942032] [2021-08-27 04:42:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:03,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:03,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:03,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256942032] [2021-08-27 04:42:03,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256942032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:03,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068016900] [2021-08-27 04:42:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:03,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:03,903 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) [2021-08-27 04:42:03,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:42:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:04,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:42:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:04,249 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:42:04,250 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:42:04,260 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 15 treesize of output 13 [2021-08-27 04:42:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:04,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068016900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:04,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:04,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:42:04,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256571762] [2021-08-27 04:42:04,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:42:04,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:42:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:42:04,401 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-08-27 04:42:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:04,608 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-08-27 04:42:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 15 [2021-08-27 04:42:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:04,609 INFO L225 Difference]: With dead ends: 95 [2021-08-27 04:42:04,609 INFO L226 Difference]: Without dead ends: 95 [2021-08-27 04:42:04,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-27 04:42:04,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2021-08-27 04:42:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 64 states have internal predecessors, (77), 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) [2021-08-27 04:42:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-08-27 04:42:04,612 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 15 [2021-08-27 04:42:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:04,612 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-08-27 04:42:04,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-08-27 04:42:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-08-27 04:42:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:42:04,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:04,613 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:04,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:04,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:04,826 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1456928450, now seen corresponding path program 1 times [2021-08-27 04:42:04,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:04,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462770017] [2021-08-27 04:42:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:04,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:04,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:04,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:04,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462770017] [2021-08-27 04:42:04,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462770017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:04,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664405630] [2021-08-27 04:42:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:04,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:04,935 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) [2021-08-27 04:42:04,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:42:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:05,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:42:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:05,127 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:05,127 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:05,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664405630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:05,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:05,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 04:42:05,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831043733] [2021-08-27 04:42:05,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:42:05,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:05,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:42:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:05,281 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-08-27 04:42:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:05,463 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-08-27 04:42:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:42:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 17 [2021-08-27 04:42:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:05,464 INFO L225 Difference]: With dead ends: 78 [2021-08-27 04:42:05,464 INFO L226 Difference]: Without dead ends: 78 [2021-08-27 04:42:05,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:42:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-27 04:42:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2021-08-27 04:42:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 61 states have internal predecessors, (73), 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) [2021-08-27 04:42:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-08-27 04:42:05,467 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-08-27 04:42:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:05,467 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-08-27 04:42:05,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-08-27 04:42:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-08-27 04:42:05,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:42:05,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:05,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:05,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:05,672 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,SelfDestructingSolverStorable9 [2021-08-27 04:42:05,673 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrncmpErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1817523924, now seen corresponding path program 1 times [2021-08-27 04:42:05,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:05,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650423564] [2021-08-27 04:42:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:05,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:05,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:05,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:05,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650423564] [2021-08-27 04:42:05,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650423564] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:05,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:05,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:05,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432769771] [2021-08-27 04:42:05,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:42:05,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:42:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:05,744 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-08-27 04:42:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:05,875 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-08-27 04:42:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:05,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 21 [2021-08-27 04:42:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:05,877 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:42:05,877 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:42:05,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:42:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-27 04:42:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 58 states have internal predecessors, (70), 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) [2021-08-27 04:42:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-08-27 04:42:05,880 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 21 [2021-08-27 04:42:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:05,880 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-08-27 04:42:05,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-08-27 04:42:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-08-27 04:42:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:42:05,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:05,881 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:05,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:42:05,882 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:05,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1817523925, now seen corresponding path program 1 times [2021-08-27 04:42:05,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:05,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56825529] [2021-08-27 04:42:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:05,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:05,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:05,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:05,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56825529] [2021-08-27 04:42:05,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56825529] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:05,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:05,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:42:05,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573386549] [2021-08-27 04:42:05,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:42:05,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:42:05,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:05,981 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-08-27 04:42:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:06,201 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-08-27 04:42:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:42:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 21 [2021-08-27 04:42:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:06,204 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:42:06,204 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 04:42:06,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:42:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 04:42:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2021-08-27 04:42:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.4) internal successors, (84), 67 states have internal predecessors, (84), 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) [2021-08-27 04:42:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-08-27 04:42:06,207 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 21 [2021-08-27 04:42:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:06,207 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-08-27 04:42:06,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-08-27 04:42:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-08-27 04:42:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 04:42:06,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:06,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:06,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 04:42:06,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash 509312965, now seen corresponding path program 1 times [2021-08-27 04:42:06,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:06,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555673065] [2021-08-27 04:42:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:06,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 04:42:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:06,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:06,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555673065] [2021-08-27 04:42:06,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555673065] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:06,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:06,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:06,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267177453] [2021-08-27 04:42:06,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:06,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:06,282 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-08-27 04:42:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:06,375 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-08-27 04:42:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 22 [2021-08-27 04:42:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:06,377 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:42:06,377 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 04:42:06,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 04:42:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-08-27 04:42:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 60 states have internal predecessors, (74), 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) [2021-08-27 04:42:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-08-27 04:42:06,380 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 22 [2021-08-27 04:42:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:06,382 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-08-27 04:42:06,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-08-27 04:42:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-08-27 04:42:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 04:42:06,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:06,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:06,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:42:06,385 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrncmpErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:06,386 INFO L82 PathProgramCache]: Analyzing trace with hash 508666854, now seen corresponding path program 1 times [2021-08-27 04:42:06,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:06,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355001525] [2021-08-27 04:42:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:06,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:06,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:06,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355001525] [2021-08-27 04:42:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355001525] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:06,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:06,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:06,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174244129] [2021-08-27 04:42:06,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:42:06,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:42:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:06,444 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-08-27 04:42:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:06,536 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-08-27 04:42:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:06,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 22 [2021-08-27 04:42:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:06,538 INFO L225 Difference]: With dead ends: 63 [2021-08-27 04:42:06,538 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:42:06,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:42:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-27 04:42:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 58 states have internal predecessors, (71), 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) [2021-08-27 04:42:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-08-27 04:42:06,547 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 22 [2021-08-27 04:42:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:06,547 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-08-27 04:42:06,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-08-27 04:42:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-08-27 04:42:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 04:42:06,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:06,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:06,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:42:06,548 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash 508666855, now seen corresponding path program 1 times [2021-08-27 04:42:06,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:06,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234936104] [2021-08-27 04:42:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:06,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:06,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:06,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234936104] [2021-08-27 04:42:06,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234936104] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:06,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:06,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:42:06,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952970557] [2021-08-27 04:42:06,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:42:06,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:42:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:06,656 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-08-27 04:42:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:06,833 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-08-27 04:42:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:42:06,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 22 [2021-08-27 04:42:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:06,834 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:42:06,834 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:42:06,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:42:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:42:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-08-27 04:42:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 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) [2021-08-27 04:42:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-27 04:42:06,836 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 22 [2021-08-27 04:42:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:06,836 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-27 04:42:06,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-08-27 04:42:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-27 04:42:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 04:42:06,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:06,837 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:06,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 04:42:06,837 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2007435023, now seen corresponding path program 1 times [2021-08-27 04:42:06,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:06,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832432352] [2021-08-27 04:42:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:06,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:06,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:06,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832432352] [2021-08-27 04:42:06,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832432352] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:06,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:06,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:06,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733828553] [2021-08-27 04:42:06,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:42:06,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:42:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:06,872 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-08-27 04:42:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:06,937 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-08-27 04:42:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:06,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 26 [2021-08-27 04:42:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:06,938 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:42:06,938 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:42:06,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:42:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-27 04:42:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 58 states have internal predecessors, (68), 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) [2021-08-27 04:42:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-08-27 04:42:06,940 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 26 [2021-08-27 04:42:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:06,940 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-08-27 04:42:06,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-08-27 04:42:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-08-27 04:42:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 04:42:06,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:06,941 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:06,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:42:06,941 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:06,942 INFO L82 PathProgramCache]: Analyzing trace with hash 489090044, now seen corresponding path program 1 times [2021-08-27 04:42:06,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:06,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876883440] [2021-08-27 04:42:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:06,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:06,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:06,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876883440] [2021-08-27 04:42:06,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876883440] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:06,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:06,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:06,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97993612] [2021-08-27 04:42:06,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:42:06,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:42:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:06,975 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-08-27 04:42:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:07,035 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-08-27 04:42:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 29 [2021-08-27 04:42:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:07,036 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:42:07,036 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:42:07,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:42:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-27 04:42:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 58 states have internal predecessors, (66), 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) [2021-08-27 04:42:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-08-27 04:42:07,038 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 29 [2021-08-27 04:42:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:07,039 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-08-27 04:42:07,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-08-27 04:42:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-08-27 04:42:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:42:07,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:07,040 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:07,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:42:07,040 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:07,040 INFO L82 PathProgramCache]: Analyzing trace with hash -859100191, now seen corresponding path program 1 times [2021-08-27 04:42:07,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:07,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245297983] [2021-08-27 04:42:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:07,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:07,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:07,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:07,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245297983] [2021-08-27 04:42:07,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245297983] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:07,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:07,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:42:07,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644086313] [2021-08-27 04:42:07,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:42:07,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:07,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:42:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:42:07,200 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-08-27 04:42:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:07,468 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-08-27 04:42:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:42:07,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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 31 [2021-08-27 04:42:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:07,469 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:42:07,469 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 04:42:07,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:42:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 04:42:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-08-27 04:42:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 53 states have internal predecessors, (59), 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) [2021-08-27 04:42:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-08-27 04:42:07,471 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 31 [2021-08-27 04:42:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:07,471 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-08-27 04:42:07,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-08-27 04:42:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-08-27 04:42:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:42:07,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:07,472 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:07,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 04:42:07,472 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash -718551581, now seen corresponding path program 1 times [2021-08-27 04:42:07,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:07,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300592118] [2021-08-27 04:42:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:07,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:07,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:07,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:07,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300592118] [2021-08-27 04:42:07,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300592118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:07,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:07,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:42:07,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620316001] [2021-08-27 04:42:07,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:42:07,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:42:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:42:07,705 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-08-27 04:42:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:07,990 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-08-27 04:42:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:42:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 31 [2021-08-27 04:42:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:07,992 INFO L225 Difference]: With dead ends: 89 [2021-08-27 04:42:07,992 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 04:42:07,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:42:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 04:42:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-08-27 04:42:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.196078431372549) internal successors, (61), 55 states have internal predecessors, (61), 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) [2021-08-27 04:42:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-08-27 04:42:07,997 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 31 [2021-08-27 04:42:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:07,997 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-08-27 04:42:07,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-08-27 04:42:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-08-27 04:42:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:42:07,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:07,999 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:07,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 04:42:07,999 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:07,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:08,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2071968550, now seen corresponding path program 1 times [2021-08-27 04:42:08,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:08,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142828621] [2021-08-27 04:42:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:08,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:08,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:08,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:08,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142828621] [2021-08-27 04:42:08,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142828621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:08,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789922399] [2021-08-27 04:42:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:08,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:08,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:08,153 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) [2021-08-27 04:42:08,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:42:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:08,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-27 04:42:08,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:08,450 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 11 treesize of output 7 [2021-08-27 04:42:08,813 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:42:08,814 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 10 [2021-08-27 04:42:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:08,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789922399] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:08,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:42:08,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 21 [2021-08-27 04:42:08,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436885953] [2021-08-27 04:42:08,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 04:42:08,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:08,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 04:42:08,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:42:08,875 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 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) [2021-08-27 04:42:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:09,191 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-08-27 04:42:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:42:09,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 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 35 [2021-08-27 04:42:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:09,192 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:42:09,192 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 04:42:09,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:42:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 04:42:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-27 04:42:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.186046511627907) internal successors, (51), 47 states have internal predecessors, (51), 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) [2021-08-27 04:42:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-08-27 04:42:09,194 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2021-08-27 04:42:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:09,195 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-08-27 04:42:09,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 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) [2021-08-27 04:42:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-08-27 04:42:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:42:09,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:09,195 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:09,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:09,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:09,409 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1562495460, now seen corresponding path program 1 times [2021-08-27 04:42:09,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:09,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38155181] [2021-08-27 04:42:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:09,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:09,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:09,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:09,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38155181] [2021-08-27 04:42:09,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38155181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:09,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722723225] [2021-08-27 04:42:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:09,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:09,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:09,558 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) [2021-08-27 04:42:09,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:42:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 04:42:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:09,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722723225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:09,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:09,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-27 04:42:09,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444285996] [2021-08-27 04:42:09,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:42:09,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:42:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:42:09,963 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:10,212 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-08-27 04:42:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:42:10,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-08-27 04:42:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:10,213 INFO L225 Difference]: With dead ends: 73 [2021-08-27 04:42:10,213 INFO L226 Difference]: Without dead ends: 73 [2021-08-27 04:42:10,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:42:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-27 04:42:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-08-27 04:42:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2) internal successors, (66), 59 states have internal predecessors, (66), 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) [2021-08-27 04:42:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-08-27 04:42:10,215 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 35 [2021-08-27 04:42:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:10,215 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-08-27 04:42:10,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-08-27 04:42:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 04:42:10,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:10,216 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:10,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:10,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:10,416 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:10,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1192719032, now seen corresponding path program 1 times [2021-08-27 04:42:10,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:10,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534579977] [2021-08-27 04:42:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:10,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:10,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:10,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:10,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534579977] [2021-08-27 04:42:10,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534579977] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:10,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:10,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-27 04:42:10,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826670650] [2021-08-27 04:42:10,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:42:10,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:42:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:42:10,661 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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) [2021-08-27 04:42:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:11,013 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-08-27 04:42:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:42:11,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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 36 [2021-08-27 04:42:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:11,015 INFO L225 Difference]: With dead ends: 84 [2021-08-27 04:42:11,016 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 04:42:11,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:42:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 04:42:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-08-27 04:42:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 60 states have internal predecessors, (67), 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) [2021-08-27 04:42:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-08-27 04:42:11,018 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 36 [2021-08-27 04:42:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:11,018 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-08-27 04:42:11,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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) [2021-08-27 04:42:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-08-27 04:42:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 04:42:11,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:11,019 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:11,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-27 04:42:11,019 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1073097963, now seen corresponding path program 1 times [2021-08-27 04:42:11,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:11,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629466779] [2021-08-27 04:42:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:11,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:11,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:11,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:11,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629466779] [2021-08-27 04:42:11,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629466779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:11,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533444907] [2021-08-27 04:42:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:11,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:11,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:11,146 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) [2021-08-27 04:42:11,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:42:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 04:42:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:11,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533444907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:11,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:11,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-27 04:42:11,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530377284] [2021-08-27 04:42:11,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-27 04:42:11,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 04:42:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:42:11,535 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:11,793 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-08-27 04:42:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:42:11,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-08-27 04:42:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:11,794 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:42:11,794 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 04:42:11,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:42:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 04:42:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-08-27 04:42:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 58 states have internal predecessors, (62), 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) [2021-08-27 04:42:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-08-27 04:42:11,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 40 [2021-08-27 04:42:11,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:11,796 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-08-27 04:42:11,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-08-27 04:42:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 04:42:11,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:11,797 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:11,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:12,012 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,SelfDestructingSolverStorable22 [2021-08-27 04:42:12,013 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash -83218317, now seen corresponding path program 1 times [2021-08-27 04:42:12,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:12,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389889812] [2021-08-27 04:42:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:12,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:12,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:12,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:12,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389889812] [2021-08-27 04:42:12,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389889812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:12,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123830993] [2021-08-27 04:42:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:12,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:12,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:12,285 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) [2021-08-27 04:42:12,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:42:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:12,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-27 04:42:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:12,639 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 [2021-08-27 04:42:13,640 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-27 04:42:13,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-08-27 04:42:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:13,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123830993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:13,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:13,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-27 04:42:13,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777794050] [2021-08-27 04:42:13,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:42:13,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:13,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:42:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:42:13,699 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:16,759 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2021-08-27 04:42:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-27 04:42:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-08-27 04:42:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:16,761 INFO L225 Difference]: With dead ends: 168 [2021-08-27 04:42:16,761 INFO L226 Difference]: Without dead ends: 77 [2021-08-27 04:42:16,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1642.9ms TimeCoverageRelationStatistics Valid=405, Invalid=3017, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 04:42:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-27 04:42:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-08-27 04:42:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 66 states have internal predecessors, (70), 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) [2021-08-27 04:42:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-08-27 04:42:16,764 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 49 [2021-08-27 04:42:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:16,764 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-08-27 04:42:16,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-08-27 04:42:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-27 04:42:16,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:16,765 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:16,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:16,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:16,965 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2107871545, now seen corresponding path program 2 times [2021-08-27 04:42:16,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:16,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819143476] [2021-08-27 04:42:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:16,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:17,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:42:17,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:17,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819143476] [2021-08-27 04:42:17,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819143476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:17,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633763338] [2021-08-27 04:42:17,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:17,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:17,098 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) [2021-08-27 04:42:17,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:42:17,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:17,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-27 04:42:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:42:17,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633763338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:17,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:17,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-27 04:42:17,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384829083] [2021-08-27 04:42:17,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 04:42:17,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 04:42:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:42:17,646 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:18,008 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-08-27 04:42:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:42:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-08-27 04:42:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:18,010 INFO L225 Difference]: With dead ends: 89 [2021-08-27 04:42:18,010 INFO L226 Difference]: Without dead ends: 89 [2021-08-27 04:42:18,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:42:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-27 04:42:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-08-27 04:42:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 78 states have internal predecessors, (85), 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) [2021-08-27 04:42:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-08-27 04:42:18,012 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 57 [2021-08-27 04:42:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:18,012 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-08-27 04:42:18,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-08-27 04:42:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 04:42:18,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:18,013 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:18,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:18,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:18,225 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash 919508483, now seen corresponding path program 2 times [2021-08-27 04:42:18,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:18,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755596262] [2021-08-27 04:42:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:18,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:42:18,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:18,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755596262] [2021-08-27 04:42:18,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755596262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:18,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690798862] [2021-08-27 04:42:18,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:18,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:18,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:18,393 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) [2021-08-27 04:42:18,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:42:18,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 04:42:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:18,664 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:18,665 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:42:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690798862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:19,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:19,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-27 04:42:19,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283203831] [2021-08-27 04:42:19,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:42:19,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:42:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:42:19,087 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:19,431 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-08-27 04:42:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:42:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-08-27 04:42:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:19,432 INFO L225 Difference]: With dead ends: 87 [2021-08-27 04:42:19,433 INFO L226 Difference]: Without dead ends: 83 [2021-08-27 04:42:19,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:42:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-27 04:42:19,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-08-27 04:42:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 76 states have internal predecessors, (80), 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) [2021-08-27 04:42:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-08-27 04:42:19,435 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 58 [2021-08-27 04:42:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:19,436 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-08-27 04:42:19,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-08-27 04:42:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-27 04:42:19,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:19,437 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:19,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:19,647 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,SelfDestructingSolverStorable25 [2021-08-27 04:42:19,647 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1530472123, now seen corresponding path program 3 times [2021-08-27 04:42:19,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:19,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637276137] [2021-08-27 04:42:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:19,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:42:19,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:19,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637276137] [2021-08-27 04:42:19,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637276137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:19,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855600930] [2021-08-27 04:42:19,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:19,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:19,892 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) [2021-08-27 04:42:19,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:42:20,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:42:20,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:20,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 04:42:20,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:20,246 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:20,247 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:20,521 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 15 treesize of output 11 [2021-08-27 04:42:20,914 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 28 [2021-08-27 04:42:21,316 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-27 04:42:21,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-08-27 04:42:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:42:21,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855600930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:21,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:21,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-08-27 04:42:21,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947507249] [2021-08-27 04:42:21,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:42:21,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:42:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:42:21,330 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:23,993 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2021-08-27 04:42:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-27 04:42:23,993 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-08-27 04:42:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:23,994 INFO L225 Difference]: With dead ends: 220 [2021-08-27 04:42:23,994 INFO L226 Difference]: Without dead ends: 95 [2021-08-27 04:42:23,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2297.4ms TimeCoverageRelationStatistics Valid=586, Invalid=4525, Unknown=1, NotChecked=0, Total=5112 [2021-08-27 04:42:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-27 04:42:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2021-08-27 04:42:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.1) internal successors, (88), 84 states have internal predecessors, (88), 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) [2021-08-27 04:42:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-08-27 04:42:23,998 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 67 [2021-08-27 04:42:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:23,998 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-08-27 04:42:23,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-08-27 04:42:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-27 04:42:23,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:23,999 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:24,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:24,216 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,SelfDestructingSolverStorable26 [2021-08-27 04:42:24,217 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash -816089973, now seen corresponding path program 4 times [2021-08-27 04:42:24,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:24,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447582323] [2021-08-27 04:42:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:24,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:24,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:24,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:24,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447582323] [2021-08-27 04:42:24,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447582323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:24,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330636030] [2021-08-27 04:42:24,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:42:24,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:24,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:24,389 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) [2021-08-27 04:42:24,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:42:24,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:42:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:24,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 04:42:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:24,772 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 10 treesize of output 8 [2021-08-27 04:42:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-08-27 04:42:25,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-08-27 04:42:25,333 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:42:25,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-08-27 04:42:26,350 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-08-27 04:42:26,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-08-27 04:42:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330636030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:26,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:26,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2021-08-27 04:42:26,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650493416] [2021-08-27 04:42:26,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:42:26,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:42:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:42:26,538 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:27,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:27,628 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-08-27 04:42:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:42:27,629 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-08-27 04:42:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:27,629 INFO L225 Difference]: With dead ends: 107 [2021-08-27 04:42:27,630 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 04:42:27,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 954.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:42:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 04:42:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-08-27 04:42:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 96 states have internal predecessors, (103), 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) [2021-08-27 04:42:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-08-27 04:42:27,633 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 75 [2021-08-27 04:42:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:27,633 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-08-27 04:42:27,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-08-27 04:42:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-27 04:42:27,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:27,634 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:27,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:27,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 04:42:27,841 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash 471014641, now seen corresponding path program 3 times [2021-08-27 04:42:27,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:27,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810460009] [2021-08-27 04:42:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:27,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:28,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:28,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:28,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810460009] [2021-08-27 04:42:28,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810460009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:28,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996622968] [2021-08-27 04:42:28,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:28,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:28,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:28,029 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:28,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:42:28,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:42:28,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:28,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-27 04:42:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:28,596 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:28,596 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:29,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996622968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:29,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:29,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-08-27 04:42:29,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832763139] [2021-08-27 04:42:29,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 04:42:29,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 04:42:29,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:42:29,212 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:29,773 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-08-27 04:42:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:42:29,774 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-08-27 04:42:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:29,774 INFO L225 Difference]: With dead ends: 105 [2021-08-27 04:42:29,774 INFO L226 Difference]: Without dead ends: 101 [2021-08-27 04:42:29,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:42:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-27 04:42:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-08-27 04:42:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 94 states have internal predecessors, (98), 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) [2021-08-27 04:42:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-08-27 04:42:29,777 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 76 [2021-08-27 04:42:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:29,777 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-08-27 04:42:29,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-08-27 04:42:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-27 04:42:29,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:29,778 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:29,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:29,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 04:42:29,979 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:29,979 INFO L82 PathProgramCache]: Analyzing trace with hash -109036009, now seen corresponding path program 5 times [2021-08-27 04:42:29,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:29,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085402044] [2021-08-27 04:42:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:29,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:30,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:30,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:30,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085402044] [2021-08-27 04:42:30,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085402044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:30,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823209634] [2021-08-27 04:42:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:42:30,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:30,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:30,262 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:30,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:42:30,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-27 04:42:30,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:42:30,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:30,957 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 [2021-08-27 04:42:31,923 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 [2021-08-27 04:42:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:31,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823209634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:31,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:31,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 32 [2021-08-27 04:42:31,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128333860] [2021-08-27 04:42:31,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:42:31,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:42:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:42:31,940 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:35,046 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2021-08-27 04:42:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-27 04:42:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-08-27 04:42:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:35,047 INFO L225 Difference]: With dead ends: 272 [2021-08-27 04:42:35,047 INFO L226 Difference]: Without dead ends: 113 [2021-08-27 04:42:35,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1840.5ms TimeCoverageRelationStatistics Valid=454, Invalid=4948, Unknown=0, NotChecked=0, Total=5402 [2021-08-27 04:42:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-27 04:42:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2021-08-27 04:42:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 102 states have internal predecessors, (106), 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) [2021-08-27 04:42:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-08-27 04:42:35,051 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 85 [2021-08-27 04:42:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:35,051 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-08-27 04:42:35,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-08-27 04:42:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-27 04:42:35,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:35,052 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:35,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-27 04:42:35,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:35,261 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash -171019299, now seen corresponding path program 6 times [2021-08-27 04:42:35,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:35,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251298295] [2021-08-27 04:42:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:35,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:35,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:35,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:35,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251298295] [2021-08-27 04:42:35,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251298295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:35,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223311933] [2021-08-27 04:42:35,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:42:35,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:35,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:35,479 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:35,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:42:36,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:42:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:36,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 04:42:36,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:36,289 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:36,289 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:37,054 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 [2021-08-27 04:42:38,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:42:38,170 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 28 treesize of output 32 [2021-08-27 04:42:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:38,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223311933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:38,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:38,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 29 [2021-08-27 04:42:38,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715322453] [2021-08-27 04:42:38,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:42:38,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:42:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:42:38,387 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:39,773 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-08-27 04:42:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:42:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-08-27 04:42:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:39,774 INFO L225 Difference]: With dead ends: 125 [2021-08-27 04:42:39,774 INFO L226 Difference]: Without dead ends: 125 [2021-08-27 04:42:39,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1030.3ms TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 04:42:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-27 04:42:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2021-08-27 04:42:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.1) internal successors, (121), 114 states have internal predecessors, (121), 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) [2021-08-27 04:42:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2021-08-27 04:42:39,777 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 93 [2021-08-27 04:42:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:39,778 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2021-08-27 04:42:39,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2021-08-27 04:42:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-27 04:42:39,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:39,779 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:39,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:39,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-27 04:42:39,985 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1006630945, now seen corresponding path program 4 times [2021-08-27 04:42:39,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:39,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494258141] [2021-08-27 04:42:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:39,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:40,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:40,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:40,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494258141] [2021-08-27 04:42:40,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494258141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:40,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198406464] [2021-08-27 04:42:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:42:40,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:40,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:40,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:40,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 04:42:41,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:42:41,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:41,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-27 04:42:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:41,181 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:41,181 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:41,477 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 [2021-08-27 04:42:42,228 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-08-27 04:42:42,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-08-27 04:42:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:42,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198406464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:42,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:42,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 31 [2021-08-27 04:42:42,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683931555] [2021-08-27 04:42:42,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:42:42,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:42,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:42:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:42:42,426 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:43,693 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2021-08-27 04:42:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:42:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-08-27 04:42:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:43,694 INFO L225 Difference]: With dead ends: 123 [2021-08-27 04:42:43,694 INFO L226 Difference]: Without dead ends: 119 [2021-08-27 04:42:43,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1012.6ms TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 04:42:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-27 04:42:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-08-27 04:42:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 112 states have internal predecessors, (116), 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) [2021-08-27 04:42:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-08-27 04:42:43,697 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 94 [2021-08-27 04:42:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:43,697 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-08-27 04:42:43,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-08-27 04:42:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-27 04:42:43,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:43,699 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:43,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:43,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:43,909 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1195262231, now seen corresponding path program 7 times [2021-08-27 04:42:43,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:43,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809479406] [2021-08-27 04:42:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:43,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:44,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:44,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:44,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809479406] [2021-08-27 04:42:44,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809479406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:44,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636091334] [2021-08-27 04:42:44,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:42:44,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:44,238 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:44,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:42:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-27 04:42:45,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:45,255 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 [2021-08-27 04:42:46,889 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 [2021-08-27 04:42:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:46,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636091334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:46,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:46,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 36 [2021-08-27 04:42:46,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518054456] [2021-08-27 04:42:46,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 04:42:46,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 04:42:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1186, Unknown=1, NotChecked=0, Total=1260 [2021-08-27 04:42:46,903 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:50,707 INFO L93 Difference]: Finished difference Result 324 states and 328 transitions. [2021-08-27 04:42:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-27 04:42:50,707 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-08-27 04:42:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:50,708 INFO L225 Difference]: With dead ends: 324 [2021-08-27 04:42:50,708 INFO L226 Difference]: Without dead ends: 131 [2021-08-27 04:42:50,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 3335.5ms TimeCoverageRelationStatistics Valid=492, Invalid=6148, Unknown=2, NotChecked=0, Total=6642 [2021-08-27 04:42:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-27 04:42:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-08-27 04:42:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 120 states have internal predecessors, (124), 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) [2021-08-27 04:42:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-08-27 04:42:50,712 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 103 [2021-08-27 04:42:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:50,712 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-08-27 04:42:50,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-08-27 04:42:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-27 04:42:50,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:50,713 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:50,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:50,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:50,929 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:50,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1001385775, now seen corresponding path program 8 times [2021-08-27 04:42:50,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:50,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522188013] [2021-08-27 04:42:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:50,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:51,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:51,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:51,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522188013] [2021-08-27 04:42:51,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522188013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:51,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066900596] [2021-08-27 04:42:51,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:51,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:51,177 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:51,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:42:52,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:52,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-27 04:42:52,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:52,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066900596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:52,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:52,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-08-27 04:42:52,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417774309] [2021-08-27 04:42:52,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:42:52,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:42:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:42:52,700 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:53,270 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2021-08-27 04:42:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:42:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-08-27 04:42:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:53,272 INFO L225 Difference]: With dead ends: 143 [2021-08-27 04:42:53,272 INFO L226 Difference]: Without dead ends: 143 [2021-08-27 04:42:53,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 389.1ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:42:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-27 04:42:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-08-27 04:42:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.0859375) internal successors, (139), 132 states have internal predecessors, (139), 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) [2021-08-27 04:42:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2021-08-27 04:42:53,275 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 111 [2021-08-27 04:42:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:53,275 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2021-08-27 04:42:53,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2021-08-27 04:42:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-27 04:42:53,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:53,276 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:53,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:53,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-27 04:42:53,493 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:53,493 INFO L82 PathProgramCache]: Analyzing trace with hash 978187981, now seen corresponding path program 5 times [2021-08-27 04:42:53,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:53,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798183187] [2021-08-27 04:42:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:53,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:53,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:53,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:53,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798183187] [2021-08-27 04:42:53,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798183187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:53,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945752593] [2021-08-27 04:42:53,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:42:53,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:53,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:53,770 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:53,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 04:42:54,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-27 04:42:54,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-27 04:42:54,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:54,792 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:54,792 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:55,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945752593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:55,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:55,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 24 [2021-08-27 04:42:55,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629938991] [2021-08-27 04:42:55,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 04:42:55,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 04:42:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:42:55,474 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:56,051 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2021-08-27 04:42:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:42:56,051 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-08-27 04:42:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:56,052 INFO L225 Difference]: With dead ends: 141 [2021-08-27 04:42:56,052 INFO L226 Difference]: Without dead ends: 137 [2021-08-27 04:42:56,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:42:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-27 04:42:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-08-27 04:42:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 130 states have internal predecessors, (134), 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) [2021-08-27 04:42:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2021-08-27 04:42:56,055 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 112 [2021-08-27 04:42:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:56,056 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2021-08-27 04:42:56,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2021-08-27 04:42:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-27 04:42:56,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:56,057 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:56,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:56,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:56,277 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1820769211, now seen corresponding path program 9 times [2021-08-27 04:42:56,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:56,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826767935] [2021-08-27 04:42:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:56,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:56,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:56,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:56,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826767935] [2021-08-27 04:42:56,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826767935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:56,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769111911] [2021-08-27 04:42:56,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:56,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:56,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:56,687 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:56,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 04:42:57,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-27 04:42:57,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-27 04:42:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:58,212 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 [2021-08-27 04:42:59,545 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 [2021-08-27 04:42:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:59,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769111911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:59,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:59,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 40 [2021-08-27 04:42:59,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988927763] [2021-08-27 04:42:59,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 04:42:59,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 04:42:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 04:42:59,560 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:03,604 INFO L93 Difference]: Finished difference Result 376 states and 380 transitions. [2021-08-27 04:43:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-27 04:43:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-08-27 04:43:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:03,605 INFO L225 Difference]: With dead ends: 376 [2021-08-27 04:43:03,605 INFO L226 Difference]: Without dead ends: 149 [2021-08-27 04:43:03,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2661.4ms TimeCoverageRelationStatistics Valid=530, Invalid=7480, Unknown=0, NotChecked=0, Total=8010 [2021-08-27 04:43:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-27 04:43:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2021-08-27 04:43:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 138 states have internal predecessors, (142), 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) [2021-08-27 04:43:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2021-08-27 04:43:03,609 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 121 [2021-08-27 04:43:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:03,609 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2021-08-27 04:43:03,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2021-08-27 04:43:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-27 04:43:03,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:03,610 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:03,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:03,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:03,811 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1138538879, now seen corresponding path program 10 times [2021-08-27 04:43:03,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:03,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486078073] [2021-08-27 04:43:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:03,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:04,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 28 proven. 206 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:43:04,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:04,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486078073] [2021-08-27 04:43:04,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486078073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:04,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240050503] [2021-08-27 04:43:04,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:43:04,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:04,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:04,104 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:04,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 04:43:05,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:43:05,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 04:43:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:05,300 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:05,300 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:43:05,309 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 10 treesize of output 8 [2021-08-27 04:43:06,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-08-27 04:43:06,278 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:43:06,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-08-27 04:43:08,004 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-08-27 04:43:08,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-08-27 04:43:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 50 proven. 184 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:43:08,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240050503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:08,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:08,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 38 [2021-08-27 04:43:08,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772710016] [2021-08-27 04:43:08,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 04:43:08,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 04:43:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:43:08,193 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:10,376 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2021-08-27 04:43:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:43:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-08-27 04:43:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:10,377 INFO L225 Difference]: With dead ends: 161 [2021-08-27 04:43:10,377 INFO L226 Difference]: Without dead ends: 161 [2021-08-27 04:43:10,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1485.1ms TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:43:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-27 04:43:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-08-27 04:43:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 146 states have (on average 1.0753424657534247) internal successors, (157), 150 states have internal predecessors, (157), 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) [2021-08-27 04:43:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2021-08-27 04:43:10,380 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 129 [2021-08-27 04:43:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:10,381 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2021-08-27 04:43:10,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2021-08-27 04:43:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-27 04:43:10,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:10,382 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:10,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:10,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:10,605 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash -934966853, now seen corresponding path program 6 times [2021-08-27 04:43:10,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:10,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126638791] [2021-08-27 04:43:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:10,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:10,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:43:10,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:10,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126638791] [2021-08-27 04:43:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126638791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:10,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43467086] [2021-08-27 04:43:10,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:43:10,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:10,917 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:10,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 04:43:12,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-27 04:43:12,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:12,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-27 04:43:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:12,449 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:12,450 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:43:12,716 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 15 treesize of output 11 [2021-08-27 04:43:13,082 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-08-27 04:43:13,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-08-27 04:43:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-08-27 04:43:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43467086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:13,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:13,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-08-27 04:43:13,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067598720] [2021-08-27 04:43:13,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:43:13,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:43:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:43:13,216 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:15,286 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-08-27 04:43:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-27 04:43:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-08-27 04:43:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:15,287 INFO L225 Difference]: With dead ends: 153 [2021-08-27 04:43:15,287 INFO L226 Difference]: Without dead ends: 149 [2021-08-27 04:43:15,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1756.8ms TimeCoverageRelationStatistics Valid=621, Invalid=4209, Unknown=0, NotChecked=0, Total=4830 [2021-08-27 04:43:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-27 04:43:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-08-27 04:43:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 144 states have internal predecessors, (148), 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) [2021-08-27 04:43:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2021-08-27 04:43:15,291 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 130 [2021-08-27 04:43:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:15,292 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2021-08-27 04:43:15,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2021-08-27 04:43:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-08-27 04:43:15,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:15,293 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:15,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:15,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-27 04:43:15,509 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:15,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1556441971, now seen corresponding path program 11 times [2021-08-27 04:43:15,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:15,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608755044] [2021-08-27 04:43:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:15,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:15,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:43:15,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:15,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608755044] [2021-08-27 04:43:15,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608755044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:15,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749290618] [2021-08-27 04:43:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:43:15,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:15,957 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:15,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 04:43:17,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-27 04:43:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:17,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 04:43:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:17,665 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 [2021-08-27 04:43:18,952 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 [2021-08-27 04:43:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:43:18,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749290618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:18,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:18,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 44 [2021-08-27 04:43:18,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355287991] [2021-08-27 04:43:18,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 04:43:18,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 04:43:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:43:18,965 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:23,625 INFO L93 Difference]: Finished difference Result 424 states and 428 transitions. [2021-08-27 04:43:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-27 04:43:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-08-27 04:43:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:23,627 INFO L225 Difference]: With dead ends: 424 [2021-08-27 04:43:23,627 INFO L226 Difference]: Without dead ends: 163 [2021-08-27 04:43:23,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 2846.2ms TimeCoverageRelationStatistics Valid=568, Invalid=8938, Unknown=0, NotChecked=0, Total=9506 [2021-08-27 04:43:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-27 04:43:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2021-08-27 04:43:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.04) internal successors, (156), 152 states have internal predecessors, (156), 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) [2021-08-27 04:43:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-08-27 04:43:23,631 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 139 [2021-08-27 04:43:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:23,631 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-08-27 04:43:23,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-08-27 04:43:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-08-27 04:43:23,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:23,633 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:23,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:23,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-27 04:43:23,849 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash 482073043, now seen corresponding path program 12 times [2021-08-27 04:43:23,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:23,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675572359] [2021-08-27 04:43:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:23,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:24,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 45 proven. 277 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:43:24,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:24,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675572359] [2021-08-27 04:43:24,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675572359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:24,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003004200] [2021-08-27 04:43:24,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:43:24,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:24,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:24,181 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:24,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 04:43:25,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-27 04:43:25,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 04:43:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:25,956 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:43:25,956 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:43:25,959 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 15 treesize of output 13 [2021-08-27 04:43:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 66 proven. 256 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:43:27,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003004200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:27,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:27,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-08-27 04:43:27,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854379791] [2021-08-27 04:43:27,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 04:43:27,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 04:43:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:43:27,136 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:28,409 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2021-08-27 04:43:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:43:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-08-27 04:43:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:28,411 INFO L225 Difference]: With dead ends: 171 [2021-08-27 04:43:28,411 INFO L226 Difference]: Without dead ends: 169 [2021-08-27 04:43:28,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=349, Invalid=2731, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 04:43:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-27 04:43:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-08-27 04:43:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 160 states have (on average 1.0375) internal successors, (166), 162 states have internal predecessors, (166), 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) [2021-08-27 04:43:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2021-08-27 04:43:28,414 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 147 [2021-08-27 04:43:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:28,414 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2021-08-27 04:43:28,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2021-08-27 04:43:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-08-27 04:43:28,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:28,415 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:28,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:28,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-27 04:43:28,629 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:28,629 INFO L82 PathProgramCache]: Analyzing trace with hash 699967839, now seen corresponding path program 13 times [2021-08-27 04:43:28,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:28,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745045675] [2021-08-27 04:43:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:28,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:43:29,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:29,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745045675] [2021-08-27 04:43:29,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745045675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:29,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374170327] [2021-08-27 04:43:29,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:43:29,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:29,118 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:29,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 04:43:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-27 04:43:30,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:31,009 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 [2021-08-27 04:43:32,517 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 [2021-08-27 04:43:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:43:32,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374170327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:32,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:32,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 48 [2021-08-27 04:43:32,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26088585] [2021-08-27 04:43:32,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-27 04:43:32,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-27 04:43:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:43:32,531 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:38,128 INFO L93 Difference]: Finished difference Result 476 states and 480 transitions. [2021-08-27 04:43:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-27 04:43:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-08-27 04:43:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:38,129 INFO L225 Difference]: With dead ends: 476 [2021-08-27 04:43:38,129 INFO L226 Difference]: Without dead ends: 181 [2021-08-27 04:43:38,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 3419.9ms TimeCoverageRelationStatistics Valid=606, Invalid=10524, Unknown=0, NotChecked=0, Total=11130 [2021-08-27 04:43:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-27 04:43:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2021-08-27 04:43:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.0357142857142858) internal successors, (174), 170 states have internal predecessors, (174), 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) [2021-08-27 04:43:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2021-08-27 04:43:38,133 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 157 [2021-08-27 04:43:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:38,133 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2021-08-27 04:43:38,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2021-08-27 04:43:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-27 04:43:38,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:38,134 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:38,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:38,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:38,345 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1199376677, now seen corresponding path program 14 times [2021-08-27 04:43:38,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:38,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091469084] [2021-08-27 04:43:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:38,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:38,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 358 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:43:38,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:38,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091469084] [2021-08-27 04:43:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091469084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:38,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325298969] [2021-08-27 04:43:38,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:43:38,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:38,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:38,717 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:38,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 04:43:40,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:43:40,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:40,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-27 04:43:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 91 proven. 333 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:43:41,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325298969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:41,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:41,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-08-27 04:43:41,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176240981] [2021-08-27 04:43:41,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 04:43:41,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 04:43:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:43:41,229 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:42,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:42,332 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2021-08-27 04:43:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:43:42,333 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-08-27 04:43:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:42,333 INFO L225 Difference]: With dead ends: 189 [2021-08-27 04:43:42,333 INFO L226 Difference]: Without dead ends: 187 [2021-08-27 04:43:42,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:43:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-27 04:43:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-08-27 04:43:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.0337078651685394) internal successors, (184), 180 states have internal predecessors, (184), 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) [2021-08-27 04:43:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2021-08-27 04:43:42,343 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 165 [2021-08-27 04:43:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:42,344 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2021-08-27 04:43:42,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2021-08-27 04:43:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-08-27 04:43:42,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:42,345 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:42,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:42,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:42,573 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1162631729, now seen corresponding path program 15 times [2021-08-27 04:43:42,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:42,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198404745] [2021-08-27 04:43:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:42,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:43,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:43:43,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:43,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198404745] [2021-08-27 04:43:43,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198404745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:43,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197465926] [2021-08-27 04:43:43,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:43:43,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:43,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:43,205 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:43,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 04:43:45,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-27 04:43:45,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:45,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-27 04:43:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:46,000 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 [2021-08-27 04:43:47,780 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 [2021-08-27 04:43:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:43:47,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197465926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:47,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:47,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 52 [2021-08-27 04:43:47,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050773410] [2021-08-27 04:43:47,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 04:43:47,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 04:43:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2547, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 04:43:47,793 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:54,365 INFO L93 Difference]: Finished difference Result 528 states and 532 transitions. [2021-08-27 04:43:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-27 04:43:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-08-27 04:43:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:54,367 INFO L225 Difference]: With dead ends: 528 [2021-08-27 04:43:54,367 INFO L226 Difference]: Without dead ends: 199 [2021-08-27 04:43:54,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 4111.3ms TimeCoverageRelationStatistics Valid=644, Invalid=12238, Unknown=0, NotChecked=0, Total=12882 [2021-08-27 04:43:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-27 04:43:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2021-08-27 04:43:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.032258064516129) internal successors, (192), 188 states have internal predecessors, (192), 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) [2021-08-27 04:43:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2021-08-27 04:43:54,372 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 175 [2021-08-27 04:43:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:54,373 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2021-08-27 04:43:54,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2021-08-27 04:43:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-08-27 04:43:54,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:54,374 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:54,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-27 04:43:54,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-27 04:43:54,581 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:54,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:54,581 INFO L82 PathProgramCache]: Analyzing trace with hash 618280055, now seen corresponding path program 16 times [2021-08-27 04:43:54,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:54,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089123982] [2021-08-27 04:43:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:54,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:54,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 91 proven. 449 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:43:54,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:54,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089123982] [2021-08-27 04:43:54,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089123982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:54,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992960715] [2021-08-27 04:43:54,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:43:54,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:54,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:54,982 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:54,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-27 04:43:56,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:43:56,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:56,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-27 04:43:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:56,846 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:56,846 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:43:56,853 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 10 treesize of output 8 [2021-08-27 04:43:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-08-27 04:43:58,295 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:43:58,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-08-27 04:44:00,863 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-08-27 04:44:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-08-27 04:44:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 128 proven. 412 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:44:01,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992960715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:01,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:01,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 50 [2021-08-27 04:44:01,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472266082] [2021-08-27 04:44:01,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 04:44:01,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 04:44:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2349, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 04:44:01,120 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:04,429 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2021-08-27 04:44:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 04:44:04,429 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2021-08-27 04:44:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:04,430 INFO L225 Difference]: With dead ends: 207 [2021-08-27 04:44:04,430 INFO L226 Difference]: Without dead ends: 205 [2021-08-27 04:44:04,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2231.7ms TimeCoverageRelationStatistics Valid=410, Invalid=4146, Unknown=0, NotChecked=0, Total=4556 [2021-08-27 04:44:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-27 04:44:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2021-08-27 04:44:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 196 states have (on average 1.030612244897959) internal successors, (202), 198 states have internal predecessors, (202), 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) [2021-08-27 04:44:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2021-08-27 04:44:04,435 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 183 [2021-08-27 04:44:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:04,435 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2021-08-27 04:44:04,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2021-08-27 04:44:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-08-27 04:44:04,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:04,436 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:04,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:04,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-27 04:44:04,657 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash -307165437, now seen corresponding path program 17 times [2021-08-27 04:44:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:04,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887039378] [2021-08-27 04:44:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:04,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:05,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:44:05,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:05,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887039378] [2021-08-27 04:44:05,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887039378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:05,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774052978] [2021-08-27 04:44:05,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:44:05,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:05,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:05,361 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:05,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-27 04:44:07,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-27 04:44:07,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-27 04:44:07,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:08,245 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 [2021-08-27 04:44:10,140 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 [2021-08-27 04:44:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:44:10,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774052978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:10,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:10,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 56 [2021-08-27 04:44:10,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915532446] [2021-08-27 04:44:10,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-27 04:44:10,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:10,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-27 04:44:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 04:44:10,153 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:17,666 INFO L93 Difference]: Finished difference Result 580 states and 584 transitions. [2021-08-27 04:44:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-27 04:44:17,666 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-08-27 04:44:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:17,667 INFO L225 Difference]: With dead ends: 580 [2021-08-27 04:44:17,667 INFO L226 Difference]: Without dead ends: 217 [2021-08-27 04:44:17,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 4422.9ms TimeCoverageRelationStatistics Valid=682, Invalid=14080, Unknown=0, NotChecked=0, Total=14762 [2021-08-27 04:44:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-27 04:44:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2021-08-27 04:44:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 204 states have (on average 1.0294117647058822) internal successors, (210), 206 states have internal predecessors, (210), 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) [2021-08-27 04:44:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2021-08-27 04:44:17,671 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 193 [2021-08-27 04:44:17,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:17,671 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2021-08-27 04:44:17,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2021-08-27 04:44:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-08-27 04:44:17,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:17,673 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:17,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-27 04:44:17,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:17,889 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1438038985, now seen corresponding path program 18 times [2021-08-27 04:44:17,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:17,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56451209] [2021-08-27 04:44:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:17,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:18,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 120 proven. 550 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 04:44:18,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:18,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56451209] [2021-08-27 04:44:18,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56451209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:18,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101887672] [2021-08-27 04:44:18,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:44:18,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:18,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:18,391 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:18,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 04:44:22,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-27 04:44:22,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:22,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 04:44:22,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:22,760 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:44:22,761 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:44:22,770 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 10 treesize of output 8 [2021-08-27 04:44:23,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-08-27 04:44:23,811 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:44:23,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-08-27 04:44:25,824 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-08-27 04:44:25,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 34 [2021-08-27 04:44:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-08-27 04:44:25,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101887672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:25,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:25,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 34 [2021-08-27 04:44:25,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578598371] [2021-08-27 04:44:25,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:44:25,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:25,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:44:25,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:44:25,976 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:29,058 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2021-08-27 04:44:29,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 04:44:29,059 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2021-08-27 04:44:29,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:29,059 INFO L225 Difference]: With dead ends: 210 [2021-08-27 04:44:29,059 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:44:29,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1969.4ms TimeCoverageRelationStatistics Valid=467, Invalid=3315, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 04:44:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:44:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:44:29,060 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) [2021-08-27 04:44:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:44:29,060 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2021-08-27 04:44:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:29,060 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:44:29,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:29,060 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:44:29,060 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:44:29,062 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr0REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr1REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr2REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr3REQUIRES_VIOLATION [2021-08-27 04:44:29,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr4REQUIRES_VIOLATION [2021-08-27 04:44:29,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr5REQUIRES_VIOLATION [2021-08-27 04:44:29,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr6REQUIRES_VIOLATION [2021-08-27 04:44:29,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr7REQUIRES_VIOLATION [2021-08-27 04:44:29,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr8REQUIRES_VIOLATION [2021-08-27 04:44:29,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr9REQUIRES_VIOLATION [2021-08-27 04:44:29,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:29,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:29,268 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:44:29,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:44:29 BoogieIcfgContainer [2021-08-27 04:44:29,273 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:44:29,274 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:44:29,274 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:44:29,274 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:44:29,275 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:42:01" (3/4) ... [2021-08-27 04:44:29,277 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:44:29,281 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:44:29,282 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:44:29,282 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:44:29,282 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:44:29,282 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:44:29,282 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:44:29,282 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrncmp [2021-08-27 04:44:29,282 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:44:29,285 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-08-27 04:44:29,286 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-27 04:44:29,286 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 04:44:29,286 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:44:29,320 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:44:29,321 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:44:29,321 INFO L168 Benchmark]: Toolchain (without parser) took 148950.16 ms. Allocated memory was 52.4 MB in the beginning and 1.3 GB in the end (delta: 1.3 GB). Free memory was 28.1 MB in the beginning and 780.3 MB in the end (delta: -752.3 MB). Peak memory consumption was 500.3 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:29,323 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 52.4 MB. Free memory was 34.6 MB in the beginning and 34.5 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:44:29,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 441.92 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 27.9 MB in the beginning and 42.5 MB in the end (delta: -14.6 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:29,323 INFO L168 Benchmark]: Boogie Preprocessor took 54.75 ms. Allocated memory is still 65.0 MB. Free memory was 42.5 MB in the beginning and 40.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:29,323 INFO L168 Benchmark]: RCFGBuilder took 636.94 ms. Allocated memory is still 65.0 MB. Free memory was 39.8 MB in the beginning and 41.2 MB in the end (delta: -1.4 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:29,324 INFO L168 Benchmark]: TraceAbstraction took 147763.80 ms. Allocated memory was 65.0 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 40.8 MB in the beginning and 784.0 MB in the end (delta: -743.2 MB). Peak memory consumption was 494.9 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:29,324 INFO L168 Benchmark]: Witness Printer took 47.00 ms. Allocated memory is still 1.3 GB. Free memory was 784.0 MB in the beginning and 780.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:29,325 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 52.4 MB. Free memory was 34.6 MB in the beginning and 34.5 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 441.92 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 27.9 MB in the beginning and 42.5 MB in the end (delta: -14.6 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.75 ms. Allocated memory is still 65.0 MB. Free memory was 42.5 MB in the beginning and 40.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 636.94 ms. Allocated memory is still 65.0 MB. Free memory was 39.8 MB in the beginning and 41.2 MB in the end (delta: -1.4 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 147763.80 ms. Allocated memory was 65.0 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 40.8 MB in the beginning and 784.0 MB in the end (delta: -743.2 MB). Peak memory consumption was 494.9 MB. Max. memory is 16.1 GB. * Witness Printer took 47.00 ms. Allocated memory is still 1.3 GB. Free memory was 784.0 MB in the beginning and 780.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: 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, 81 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 147699.5ms, OverallIterations: 46, TraceHistogramMax: 11, EmptinessCheckTime: 44.3ms, AutomataDifference: 64438.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2341 SDtfs, 9806 SDslu, 10329 SDs, 0 SdLazy, 68163 SolverSat, 1160 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 31745.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4187 GetRequests, 2551 SyntacticMatches, 29 SemanticMatches, 1607 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18659 ImplicationChecksByTransitivity, 42228.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=211occurred in iteration=45, InterpolantAutomatonStates: 1051, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 189.4ms AutomataMinimizationTime, 46 MinimizatonAttempts, 231 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 479.3ms SsaConstructionTime, 5318.8ms SatisfiabilityAnalysisTime, 47038.5ms InterpolantComputationTime, 6084 NumberOfCodeBlocks, 6032 NumberOfCodeBlocksAsserted, 152 NumberOfCheckSat, 6010 ConstructedInterpolants, 851 QuantifiedInterpolants, 69318 SizeOfPredicates, 287 NumberOfNonLiveVariables, 10475 ConjunctsInSsa, 1161 ConjunctsInUnsatCore, 74 InterpolantComputations, 19 PerfectInterpolantSequences, 4841/13756 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 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:44:29,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...