./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.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/cstrlen-alloca-2.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 a9da884533d6d47d95abcc742a22337ea753025b ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 04:41:48,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:41:48,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:41:48,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:41:48,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:41:48,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:41:48,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:41:48,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:41:48,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:41:48,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:41:48,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:41:48,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:41:48,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:41:48,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:41:48,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:41:48,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:41:48,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:41:48,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:41:48,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:41:48,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:41:48,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:41:48,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:41:48,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:41:48,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:41:48,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:41:48,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:41:48,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:41:48,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:41:48,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:41:48,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:41:48,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:41:48,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:41:48,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:41:48,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:41:48,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:41:48,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:41:48,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:41:48,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:41:48,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:41:48,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:41:48,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:41:48,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:41:48,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:41:48,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:41:48,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:41:48,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:41:48,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:41:48,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:41:48,864 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:41:48,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:41:48,864 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:41:48,864 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:41:48,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:41:48,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:41:48,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:41:48,865 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:41:48,865 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:41:48,865 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:41:48,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:41:48,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:41:48,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:41:48,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:41:48,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:41:48,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:41:48,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:41:48,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:48,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:41:48,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:41:48,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:41:48,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:41:48,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:41:48,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9da884533d6d47d95abcc742a22337ea753025b [2021-08-27 04:41:49,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:41:49,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:41:49,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:41:49,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:41:49,154 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:41:49,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-08-27 04:41:49,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b465e32/b9bf322a419f48fb95bec94c78f44abc/FLAG1d68ea9b4 [2021-08-27 04:41:49,598 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:41:49,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-08-27 04:41:49,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b465e32/b9bf322a419f48fb95bec94c78f44abc/FLAG1d68ea9b4 [2021-08-27 04:41:49,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b465e32/b9bf322a419f48fb95bec94c78f44abc [2021-08-27 04:41:49,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:41:49,646 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:41:49,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:41:49,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:41:49,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:41:49,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39dad5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49, skipping insertion in model container [2021-08-27 04:41:49,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:41:49,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:41:49,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:41:49,856 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:41:49,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:41:49,930 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:41:49,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49 WrapperNode [2021-08-27 04:41:49,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:41:49,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:41:49,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:41:49,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:41:49,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:41:49,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:41:49,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:41:49,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:41:49,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:50,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:50,033 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 04:41:50,078 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 04:41:50,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:41:50,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:41:50,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:41:50,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:41:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:41:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:41:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:41:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2021-08-27 04:41:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:41:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:41:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:41:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:41:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:41:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:41:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:41:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:41:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:41:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:41:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:41:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:41:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:41:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:41:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:41:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:41:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:41:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:41:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:41:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:41:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:41:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:41:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:41:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:41:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:41:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:41:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:41:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:41:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:41:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:41:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:41:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:41:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:41:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:41:50,100 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:41:50,100 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:41:50,100 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:41:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:41:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:41:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:41:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:41:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:41:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:41:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:41:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:41:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:41:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:41:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:41:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:41:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:41:50,104 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:41:50,105 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:41:50,105 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:41:50,105 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:41:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:41:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:41:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:41:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:41:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:41:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:41:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:41:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:41:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:41:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:41:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:41:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:41:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:41:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:41:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:41:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:41:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:41:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:41:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:41:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:41:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:41:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:41:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:41:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:41:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:41:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:41:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:41:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2021-08-27 04:41:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:41:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:41:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:41:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:41:50,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:41:50,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:41:50,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:41:50,546 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:41:50,546 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 04:41:50,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:50 BoogieIcfgContainer [2021-08-27 04:41:50,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:41:50,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:41:50,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:41:50,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:41:50,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:41:49" (1/3) ... [2021-08-27 04:41:50,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dce9e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:41:50, skipping insertion in model container [2021-08-27 04:41:50,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (2/3) ... [2021-08-27 04:41:50,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dce9e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:41:50, skipping insertion in model container [2021-08-27 04:41:50,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:50" (3/3) ... [2021-08-27 04:41:50,557 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-08-27 04:41:50,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:41:50,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-27 04:41:50,598 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:41:50,604 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 04:41:50,605 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-27 04:41:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 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 04:41:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:50,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341813, now seen corresponding path program 1 times [2021-08-27 04:41:50,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828277316] [2021-08-27 04:41:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,776 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 04:41:50,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828277316] [2021-08-27 04:41:50,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828277316] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:41:50,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657092203] [2021-08-27 04:41:50,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:50,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:50,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:50,805 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,863 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-08-27 04:41:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:50,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:41:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,868 INFO L225 Difference]: With dead ends: 30 [2021-08-27 04:41:50,869 INFO L226 Difference]: Without dead ends: 27 [2021-08-27 04:41:50,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-27 04:41:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-27 04:41:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-27 04:41:50,888 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-08-27 04:41:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,888 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-27 04:41:50,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-27 04:41:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:50,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:41:50,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341814, now seen corresponding path program 1 times [2021-08-27 04:41:50,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770605743] [2021-08-27 04:41:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,959 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 04:41:50,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770605743] [2021-08-27 04:41:50,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770605743] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:50,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659664805] [2021-08-27 04:41:50,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:50,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:50,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:50,962 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,014 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-08-27 04:41:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:41:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,015 INFO L225 Difference]: With dead ends: 26 [2021-08-27 04:41:51,016 INFO L226 Difference]: Without dead ends: 26 [2021-08-27 04:41:51,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-27 04:41:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-27 04:41:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 states have internal predecessors, (23), 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 04:41:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-27 04:41:51,018 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2021-08-27 04:41:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,019 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-27 04:41:51,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-27 04:41:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:51,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:41:51,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341867, now seen corresponding path program 1 times [2021-08-27 04:41:51,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35174779] [2021-08-27 04:41:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,090 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 04:41:51,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35174779] [2021-08-27 04:41:51,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35174779] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:51,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992020627] [2021-08-27 04:41:51,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:51,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:51,095 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,146 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-08-27 04:41:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:51,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:41:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,148 INFO L225 Difference]: With dead ends: 33 [2021-08-27 04:41:51,148 INFO L226 Difference]: Without dead ends: 33 [2021-08-27 04:41:51,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 04:41:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-27 04:41:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-08-27 04:41:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-27 04:41:51,153 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2021-08-27 04:41:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,153 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-27 04:41:51,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-27 04:41:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:51,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,154 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:41:51,154 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1480401449, now seen corresponding path program 1 times [2021-08-27 04:41:51,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398982873] [2021-08-27 04:41:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,245 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 04:41:51,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398982873] [2021-08-27 04:41:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398982873] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:51,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356901629] [2021-08-27 04:41:51,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:51,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:51,250 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,322 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-08-27 04:41:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:41:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,324 INFO L225 Difference]: With dead ends: 37 [2021-08-27 04:41:51,324 INFO L226 Difference]: Without dead ends: 37 [2021-08-27 04:41:51,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-27 04:41:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-08-27 04:41:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-08-27 04:41:51,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 10 [2021-08-27 04:41:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,328 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-08-27 04:41:51,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-08-27 04:41:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:51,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,328 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:41:51,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrlenErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,329 INFO L82 PathProgramCache]: Analyzing trace with hash 138789715, now seen corresponding path program 1 times [2021-08-27 04:41:51,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626572248] [2021-08-27 04:41:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,405 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 04:41:51,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626572248] [2021-08-27 04:41:51,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626572248] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:51,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572573977] [2021-08-27 04:41:51,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:51,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:51,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:51,408 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,475 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-08-27 04:41:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:51,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:41:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,477 INFO L225 Difference]: With dead ends: 29 [2021-08-27 04:41:51,477 INFO L226 Difference]: Without dead ends: 29 [2021-08-27 04:41:51,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-27 04:41:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-27 04:41:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 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 04:41:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-08-27 04:41:51,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2021-08-27 04:41:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,485 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-08-27 04:41:51,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-08-27 04:41:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:51,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:41:51,488 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash 138789716, now seen corresponding path program 1 times [2021-08-27 04:41:51,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540459139] [2021-08-27 04:41:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,585 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 04:41:51,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540459139] [2021-08-27 04:41:51,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540459139] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:41:51,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651317842] [2021-08-27 04:41:51,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:41:51,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:41:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:51,587 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,671 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-27 04:41:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:41:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:41:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,673 INFO L225 Difference]: With dead ends: 34 [2021-08-27 04:41:51,673 INFO L226 Difference]: Without dead ends: 34 [2021-08-27 04:41:51,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:41:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-27 04:41:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-08-27 04:41:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-08-27 04:41:51,676 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2021-08-27 04:41:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,676 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-08-27 04:41:51,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-08-27 04:41:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:41:51,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:41:51,677 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 232930637, now seen corresponding path program 1 times [2021-08-27 04:41:51,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524078384] [2021-08-27 04:41:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:51,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524078384] [2021-08-27 04:41:51,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524078384] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 04:41:51,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842940818] [2021-08-27 04:41:51,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:41:51,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:41:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:41:51,806 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 04:41:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,942 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-08-27 04:41:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:41:51,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 15 [2021-08-27 04:41:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,943 INFO L225 Difference]: With dead ends: 41 [2021-08-27 04:41:51,943 INFO L226 Difference]: Without dead ends: 41 [2021-08-27 04:41:51,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:41:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-27 04:41:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-08-27 04:41:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:41:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-08-27 04:41:51,950 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2021-08-27 04:41:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,950 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-08-27 04:41:51,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 04:41:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-08-27 04:41:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:41:51,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:41:51,951 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash 912989007, now seen corresponding path program 1 times [2021-08-27 04:41:51,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698715826] [2021-08-27 04:41:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:52,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698715826] [2021-08-27 04:41:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698715826] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:52,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:52,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:41:52,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823060116] [2021-08-27 04:41:52,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:41:52,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:41:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:41:52,068 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 04:41:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:52,190 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-08-27 04:41:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:41:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 15 [2021-08-27 04:41:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:52,190 INFO L225 Difference]: With dead ends: 51 [2021-08-27 04:41:52,191 INFO L226 Difference]: Without dead ends: 51 [2021-08-27 04:41:52,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:41:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-27 04:41:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-08-27 04:41:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:41:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-08-27 04:41:52,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2021-08-27 04:41:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:52,193 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-08-27 04:41:52,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 04:41:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-08-27 04:41:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:41:52,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:52,193 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:52,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:41:52,194 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:52,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,194 INFO L82 PathProgramCache]: Analyzing trace with hash -754029460, now seen corresponding path program 1 times [2021-08-27 04:41:52,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052568211] [2021-08-27 04:41:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,257 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 04:41:52,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052568211] [2021-08-27 04:41:52,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052568211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:52,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491365099] [2021-08-27 04:41:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:52,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:52,273 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 04:41:52,280 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 04:41:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:41:52,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:52,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:41:52,511 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 04:41:52,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491365099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:52,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:52,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:41:52,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248673393] [2021-08-27 04:41:52,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:41:52,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:41:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:52,513 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (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 04:41:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:52,602 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-08-27 04:41:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:52,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 04:41:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:52,603 INFO L225 Difference]: With dead ends: 42 [2021-08-27 04:41:52,603 INFO L226 Difference]: Without dead ends: 42 [2021-08-27 04:41:52,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-27 04:41:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-08-27 04:41:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:41:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-08-27 04:41:52,616 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2021-08-27 04:41:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:52,617 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-08-27 04:41:52,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (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 04:41:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-08-27 04:41:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:41:52,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:52,618 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:52,648 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 04:41:52,832 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 04:41:52,832 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1444358493, now seen corresponding path program 1 times [2021-08-27 04:41:52,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946463271] [2021-08-27 04:41:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-27 04:41:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,893 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 04:41:52,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946463271] [2021-08-27 04:41:52,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946463271] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:52,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:52,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:52,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049421351] [2021-08-27 04:41:52,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:52,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:52,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:52,897 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:52,923 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-08-27 04:41:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-08-27 04:41:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:52,923 INFO L225 Difference]: With dead ends: 35 [2021-08-27 04:41:52,924 INFO L226 Difference]: Without dead ends: 20 [2021-08-27 04:41:52,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-27 04:41:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-27 04:41:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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 04:41:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-27 04:41:52,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2021-08-27 04:41:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:52,925 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-27 04:41:52,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-27 04:41:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:41:52,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:52,926 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:52,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:41:52,926 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1892891924, now seen corresponding path program 1 times [2021-08-27 04:41:52,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665639760] [2021-08-27 04:41:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,020 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 04:41:53,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665639760] [2021-08-27 04:41:53,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665639760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:53,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648327168] [2021-08-27 04:41:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:53,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:53,025 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 04:41:53,046 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 04:41:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:41:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:53,279 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 04:41:53,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648327168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:53,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:53,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-27 04:41:53,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360671758] [2021-08-27 04:41:53,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:41:53,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:41:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:41:53,281 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 04:41:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:53,396 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-08-27 04:41:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:41:53,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 19 [2021-08-27 04:41:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:53,398 INFO L225 Difference]: With dead ends: 26 [2021-08-27 04:41:53,398 INFO L226 Difference]: Without dead ends: 26 [2021-08-27 04:41:53,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:41:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-27 04:41:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-08-27 04:41:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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 04:41:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-27 04:41:53,401 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-08-27 04:41:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:53,401 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-27 04:41:53,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 04:41:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-27 04:41:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:41:53,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:53,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:53,420 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 04:41:53,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-27 04:41:53,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:53,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1996994277, now seen corresponding path program 2 times [2021-08-27 04:41:53,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:53,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465574557] [2021-08-27 04:41:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:53,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465574557] [2021-08-27 04:41:53,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465574557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:53,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234460766] [2021-08-27 04:41:53,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:41:53,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:53,791 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 04:41:53,801 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 04:41:53,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:41:53,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:53,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 04:41:53,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:53,981 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 04:41:54,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:41:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-27 04:41:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:54,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234460766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:54,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:54,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-08-27 04:41:54,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345857307] [2021-08-27 04:41:54,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 04:41:54,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:54,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 04:41:54,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:41:54,365 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 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 04:41:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:54,975 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-08-27 04:41:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:41:54,975 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 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 21 [2021-08-27 04:41:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:54,976 INFO L225 Difference]: With dead ends: 39 [2021-08-27 04:41:54,976 INFO L226 Difference]: Without dead ends: 32 [2021-08-27 04:41:54,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 666.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:41:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-27 04:41:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-08-27 04:41:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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 04:41:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-08-27 04:41:54,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-08-27 04:41:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:54,978 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-08-27 04:41:54,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 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 04:41:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-08-27 04:41:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:41:54,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:54,979 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:54,997 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 04:41:55,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:55,193 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1847085883, now seen corresponding path program 3 times [2021-08-27 04:41:55,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:55,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147585495] [2021-08-27 04:41:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:55,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:55,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:55,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:55,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147585495] [2021-08-27 04:41:55,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147585495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:55,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959820184] [2021-08-27 04:41:55,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:41:55,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:55,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:55,377 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 04:41:55,378 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 04:41:55,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:41:55,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:55,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-27 04:41:55,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:55,644 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 04:41:55,792 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 04:41:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959820184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:55,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:55,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-27 04:41:55,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413793742] [2021-08-27 04:41:55,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 04:41:55,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 04:41:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:41:55,802 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 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 04:41:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:56,093 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-08-27 04:41:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:41:56,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 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 27 [2021-08-27 04:41:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:56,094 INFO L225 Difference]: With dead ends: 44 [2021-08-27 04:41:56,094 INFO L226 Difference]: Without dead ends: 35 [2021-08-27 04:41:56,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:41:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-27 04:41:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-08-27 04:41:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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 04:41:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-08-27 04:41:56,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-08-27 04:41:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:56,102 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-08-27 04:41:56,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 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 04:41:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-08-27 04:41:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:41:56,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:56,104 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:56,122 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 04:41:56,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:56,310 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:56,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1827827544, now seen corresponding path program 4 times [2021-08-27 04:41:56,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:56,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058476803] [2021-08-27 04:41:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:56,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:56,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:56,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058476803] [2021-08-27 04:41:56,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058476803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:56,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617690872] [2021-08-27 04:41:56,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:41:56,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:56,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:56,477 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 04:41:56,512 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 04:41:56,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:41:56,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-27 04:41:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:56,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:41:56,824 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 04:41:57,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:41:57,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-27 04:41:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:57,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617690872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:57,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:57,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-27 04:41:57,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686505073] [2021-08-27 04:41:57,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 04:41:57,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 04:41:57,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:41:57,156 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 04:41:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:57,609 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-27 04:41:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:41:57,609 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 31 [2021-08-27 04:41:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:57,610 INFO L225 Difference]: With dead ends: 35 [2021-08-27 04:41:57,610 INFO L226 Difference]: Without dead ends: 35 [2021-08-27 04:41:57,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:41:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-27 04:41:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-08-27 04:41:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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 04:41:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-08-27 04:41:57,612 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-08-27 04:41:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:57,612 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-08-27 04:41:57,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 04:41:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-08-27 04:41:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 04:41:57,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:57,613 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:57,630 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 04:41:57,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-27 04:41:57,829 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash -99354543, now seen corresponding path program 5 times [2021-08-27 04:41:57,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:57,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948922800] [2021-08-27 04:41:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:57,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:58,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:58,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:58,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948922800] [2021-08-27 04:41:58,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948922800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:58,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235487990] [2021-08-27 04:41:58,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:41:58,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:58,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:58,051 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 04:41:58,052 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 04:41:58,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-27 04:41:58,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:58,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-27 04:41:58,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:58,415 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 04:41:58,597 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 04:41:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:58,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235487990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:58,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:58,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-08-27 04:41:58,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936835188] [2021-08-27 04:41:58,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 04:41:58,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:58,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 04:41:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:41:58,603 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 04:41:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:58,965 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-08-27 04:41:58,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:41:58,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 33 [2021-08-27 04:41:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:58,966 INFO L225 Difference]: With dead ends: 52 [2021-08-27 04:41:58,966 INFO L226 Difference]: Without dead ends: 41 [2021-08-27 04:41:58,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 04:41:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-27 04:41:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-08-27 04:41:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 04:41:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-08-27 04:41:58,968 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-08-27 04:41:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:58,968 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-08-27 04:41:58,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 04:41:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-08-27 04:41:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:41:58,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:58,969 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:58,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-27 04:41:59,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 04:41:59,188 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:41:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:59,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1272435374, now seen corresponding path program 6 times [2021-08-27 04:41:59,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:59,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503855261] [2021-08-27 04:41:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:59,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:59,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:59,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:59,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503855261] [2021-08-27 04:41:59,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503855261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:59,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601876625] [2021-08-27 04:41:59,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:41:59,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:59,360 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 04:41:59,371 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 04:41:59,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:41:59,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:59,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-27 04:41:59,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:59,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601876625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:59,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:59,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-08-27 04:41:59,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242542131] [2021-08-27 04:41:59,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:41:59,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:41:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:41:59,851 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 04:42:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:00,144 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-08-27 04:42:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:42:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 37 [2021-08-27 04:42:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:00,144 INFO L225 Difference]: With dead ends: 41 [2021-08-27 04:42:00,144 INFO L226 Difference]: Without dead ends: 41 [2021-08-27 04:42:00,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:42:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-27 04:42:00,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-08-27 04:42:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 04:42:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-08-27 04:42:00,146 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2021-08-27 04:42:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:00,147 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-08-27 04:42:00,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 04:42:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-08-27 04:42:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 04:42:00,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:00,147 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:00,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-27 04:42:00,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:00,367 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:42:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1255285209, now seen corresponding path program 7 times [2021-08-27 04:42:00,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:00,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9165935] [2021-08-27 04:42:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:00,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:00,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:00,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:00,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9165935] [2021-08-27 04:42:00,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9165935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:00,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857819134] [2021-08-27 04:42:00,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:42:00,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:00,613 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 04:42:00,620 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 04:42:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 04:42:00,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:00,981 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 04:42:01,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:42:01,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-27 04:42:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:01,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857819134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:01,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:01,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-08-27 04:42:01,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997114330] [2021-08-27 04:42:01,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 04:42:01,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:01,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 04:42:01,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:42:01,750 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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 04:42:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:03,379 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-08-27 04:42:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-27 04:42:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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 39 [2021-08-27 04:42:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:03,379 INFO L225 Difference]: With dead ends: 63 [2021-08-27 04:42:03,380 INFO L226 Difference]: Without dead ends: 50 [2021-08-27 04:42:03,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1270.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 04:42:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-27 04:42:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-08-27 04:42:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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 04:42:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-08-27 04:42:03,382 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2021-08-27 04:42:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:03,382 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-08-27 04:42:03,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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 04:42:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-08-27 04:42:03,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:42:03,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:03,383 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:03,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-27 04:42:03,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 04:42:03,587 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:42:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash 592780477, now seen corresponding path program 8 times [2021-08-27 04:42:03,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:03,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894900894] [2021-08-27 04:42:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:03,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:03,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:03,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894900894] [2021-08-27 04:42:03,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894900894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:03,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169742463] [2021-08-27 04:42:03,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:03,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:03,845 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 04:42:03,845 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 04:42:04,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:04,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:04,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-27 04:42:04,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:04,266 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 04:42:04,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:42:04,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-27 04:42:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:05,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169742463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:05,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:05,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-08-27 04:42:05,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073899524] [2021-08-27 04:42:05,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 04:42:05,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:05,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 04:42:05,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 04:42:05,066 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 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 04:42:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:07,579 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-08-27 04:42:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 04:42:07,579 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 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 45 [2021-08-27 04:42:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:07,579 INFO L225 Difference]: With dead ends: 71 [2021-08-27 04:42:07,579 INFO L226 Difference]: Without dead ends: 56 [2021-08-27 04:42:07,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1456.9ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-08-27 04:42:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-27 04:42:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-08-27 04:42:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-08-27 04:42:07,582 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2021-08-27 04:42:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:07,582 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-08-27 04:42:07,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 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 04:42:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-08-27 04:42:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:42:07,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:07,583 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:07,650 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 04:42:07,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 04:42:07,793 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:42:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1607150573, now seen corresponding path program 9 times [2021-08-27 04:42:07,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:07,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172958330] [2021-08-27 04:42:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:07,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:08,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:08,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172958330] [2021-08-27 04:42:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172958330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:08,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663363945] [2021-08-27 04:42:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:08,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:08,103 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 04:42:08,106 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 04:42:08,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-27 04:42:08,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:08,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 04:42:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:08,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:42:08,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 04:42:08,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:42:08,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-08-27 04:42:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-27 04:42:08,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663363945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:08,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:08,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 28 [2021-08-27 04:42:08,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093197837] [2021-08-27 04:42:08,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:42:08,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:42:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:42:08,952 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 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 04:42:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:10,485 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-08-27 04:42:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-27 04:42:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 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 51 [2021-08-27 04:42:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:10,486 INFO L225 Difference]: With dead ends: 75 [2021-08-27 04:42:10,486 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:42:10,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1461.2ms TimeCoverageRelationStatistics Valid=345, Invalid=3077, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 04:42:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:42:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:42:10,487 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 04:42:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:42:10,487 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-08-27 04:42:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:10,487 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:42:10,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 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 04:42:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:42:10,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:42:10,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:42:10,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:42:10,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:42:10,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:42:10,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:42:10,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr0REQUIRES_VIOLATION [2021-08-27 04:42:10,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr1REQUIRES_VIOLATION [2021-08-27 04:42:10,507 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 04:42:10,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:10,706 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:42:10,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:42:10 BoogieIcfgContainer [2021-08-27 04:42:10,710 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:42:10,711 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:42:10,711 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:42:10,711 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:42:10,711 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:50" (3/4) ... [2021-08-27 04:42:10,713 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:42:10,717 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:42:10,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:42:10,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:42:10,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:42:10,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:42:10,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2021-08-27 04:42:10,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:42:10,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:42:10,723 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-08-27 04:42:10,723 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-27 04:42:10,723 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:42:10,723 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:42:10,747 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:42:10,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:42:10,748 INFO L168 Benchmark]: Toolchain (without parser) took 21101.44 ms. Allocated memory was 58.7 MB in the beginning and 207.6 MB in the end (delta: 148.9 MB). Free memory was 36.8 MB in the beginning and 134.0 MB in the end (delta: -97.2 MB). Peak memory consumption was 52.3 MB. Max. memory is 16.1 GB. [2021-08-27 04:42:10,749 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 58.7 MB. Free memory was 41.3 MB in the beginning and 41.2 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:42:10,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.91 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 37.8 MB in the end (delta: -1.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-27 04:42:10,749 INFO L168 Benchmark]: Boogie Preprocessor took 64.79 ms. Allocated memory is still 58.7 MB. Free memory was 37.8 MB in the beginning and 35.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:42:10,749 INFO L168 Benchmark]: RCFGBuilder took 552.03 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 35.5 MB in the beginning and 52.1 MB in the end (delta: -16.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-08-27 04:42:10,750 INFO L168 Benchmark]: TraceAbstraction took 20159.74 ms. Allocated memory was 77.6 MB in the beginning and 207.6 MB in the end (delta: 130.0 MB). Free memory was 51.3 MB in the beginning and 136.9 MB in the end (delta: -85.6 MB). Peak memory consumption was 45.7 MB. Max. memory is 16.1 GB. [2021-08-27 04:42:10,750 INFO L168 Benchmark]: Witness Printer took 36.31 ms. Allocated memory is still 207.6 MB. Free memory was 136.9 MB in the beginning and 134.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:42:10,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 58.7 MB. Free memory was 41.3 MB in the beginning and 41.2 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.91 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 37.8 MB in the end (delta: -1.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.79 ms. Allocated memory is still 58.7 MB. Free memory was 37.8 MB in the beginning and 35.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 552.03 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 35.5 MB in the beginning and 52.1 MB in the end (delta: -16.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20159.74 ms. Allocated memory was 77.6 MB in the beginning and 207.6 MB in the end (delta: 130.0 MB). Free memory was 51.3 MB in the beginning and 136.9 MB in the end (delta: -85.6 MB). Peak memory consumption was 45.7 MB. Max. memory is 16.1 GB. * Witness Printer took 36.31 ms. Allocated memory is still 207.6 MB. Free memory was 136.9 MB in the beginning and 134.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms 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: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: 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, 47 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 20109.2ms, OverallIterations: 19, TraceHistogramMax: 7, EmptinessCheckTime: 16.7ms, AutomataDifference: 8613.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 284 SDtfs, 741 SDslu, 1424 SDs, 0 SdLazy, 5181 SolverSat, 265 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3810.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 7118.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=18, InterpolantAutomatonStates: 246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 65.2ms AutomataMinimizationTime, 19 MinimizatonAttempts, 62 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 75.9ms SsaConstructionTime, 331.4ms SatisfiabilityAnalysisTime, 7045.9ms InterpolantComputationTime, 749 NumberOfCodeBlocks, 745 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 720 ConstructedInterpolants, 52 QuantifiedInterpolants, 5638 SizeOfPredicates, 76 NumberOfNonLiveVariables, 1365 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 212/746 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:42:10,788 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...