./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer --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 efc45e5708d4a9b560055cd5abf7b168f9024833 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:56:18,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:18,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:18,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:18,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:18,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:18,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:18,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:18,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:18,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:18,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:18,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:18,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:18,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:18,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:18,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:18,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:18,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:18,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:18,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:18,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:18,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:18,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:18,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:18,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:18,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:18,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:18,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:18,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:18,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:18,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:18,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:18,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:18,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:18,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:18,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:18,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:18,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:18,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:18,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:18,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:18,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-10-22 08:56:18,116 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:18,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:18,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:18,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:18,121 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:18,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:18,122 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:56:18,122 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:56:18,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:56:18,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:56:18,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:18,122 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 08:56:18,122 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 08:56:18,123 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 08:56:18,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:56:18,123 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:56:18,123 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:18,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:18,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:18,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:56:18,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:56:18,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:18,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:18,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:56:18,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:56:18,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:56:18,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer 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 -> efc45e5708d4a9b560055cd5abf7b168f9024833 [2019-10-22 08:56:18,164 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:18,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:18,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:18,178 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:18,179 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:18,179 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2019-10-22 08:56:18,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/data/e845c6a64/02a01d1e40f04f0cadf8f157e22cf2ad/FLAG660cd0fc7 [2019-10-22 08:56:18,684 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:18,685 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2019-10-22 08:56:18,695 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/data/e845c6a64/02a01d1e40f04f0cadf8f157e22cf2ad/FLAG660cd0fc7 [2019-10-22 08:56:19,200 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/data/e845c6a64/02a01d1e40f04f0cadf8f157e22cf2ad [2019-10-22 08:56:19,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:19,205 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-10-22 08:56:19,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:19,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:19,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:19,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64613790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19, skipping insertion in model container [2019-10-22 08:56:19,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,221 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:19,252 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:19,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:19,596 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:19,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:19,690 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:19,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19 WrapperNode [2019-10-22 08:56:19,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:19,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:19,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:19,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:19,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:19,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:19,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:19,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:19,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:19,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-22 08:56:19,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:19,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-22 08:56:19,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-22 08:56:19,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-22 08:56:19,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-22 08:56:19,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-22 08:56:19,795 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2019-10-22 08:56:19,795 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2019-10-22 08:56:19,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-22 08:56:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-22 08:56:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-22 08:56:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-22 08:56:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-22 08:56:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-22 08:56:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-22 08:56:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-22 08:56:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-22 08:56:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-22 08:56:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-22 08:56:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-22 08:56:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-22 08:56:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-22 08:56:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-22 08:56:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-22 08:56:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-22 08:56:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-22 08:56:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-22 08:56:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-22 08:56:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-22 08:56:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-22 08:56:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-22 08:56:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-22 08:56:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-22 08:56:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-22 08:56:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-22 08:56:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-22 08:56:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-22 08:56:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-22 08:56:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-22 08:56:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-22 08:56:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-22 08:56:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-22 08:56:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-22 08:56:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-22 08:56:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-22 08:56:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-22 08:56:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-22 08:56:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-22 08:56:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-22 08:56:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-22 08:56:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-22 08:56:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-22 08:56:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-22 08:56:19,806 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-22 08:56:19,806 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-22 08:56:19,806 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-22 08:56:19,806 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-22 08:56:19,806 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-22 08:56:19,806 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-22 08:56:19,806 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-22 08:56:19,806 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-22 08:56:19,807 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-22 08:56:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-22 08:56:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-22 08:56:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-22 08:56:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-22 08:56:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-22 08:56:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:56:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-22 08:56:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:20,359 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:20,359 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-22 08:56:20,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:20 BoogieIcfgContainer [2019-10-22 08:56:20,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:20,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:56:20,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:56:20,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:56:20,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:56:19" (1/3) ... [2019-10-22 08:56:20,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605c58f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:20, skipping insertion in model container [2019-10-22 08:56:20,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (2/3) ... [2019-10-22 08:56:20,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605c58f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:20, skipping insertion in model container [2019-10-22 08:56:20,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:20" (3/3) ... [2019-10-22 08:56:20,368 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2019-10-22 08:56:20,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:56:20,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2019-10-22 08:56:20,394 INFO L249 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2019-10-22 08:56:20,416 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:56:20,416 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 08:56:20,416 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:56:20,416 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:20,416 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:20,416 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:56:20,417 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:20,417 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:56:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2019-10-22 08:56:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:56:20,445 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:20,446 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:20,448 INFO L410 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:20,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183926, now seen corresponding path program 1 times [2019-10-22 08:56:20,463 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:20,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375407744] [2019-10-22 08:56:20,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:20,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375407744] [2019-10-22 08:56:20,618 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:20,619 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:56:20,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087863633] [2019-10-22 08:56:20,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:56:20,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:20,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:56:20,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:56:20,637 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2019-10-22 08:56:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:20,741 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2019-10-22 08:56:20,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:56:20,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-22 08:56:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:20,750 INFO L225 Difference]: With dead ends: 56 [2019-10-22 08:56:20,751 INFO L226 Difference]: Without dead ends: 53 [2019-10-22 08:56:20,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:56:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-22 08:56:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-22 08:56:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 08:56:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-22 08:56:20,784 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 11 [2019-10-22 08:56:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:20,784 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-22 08:56:20,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:56:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-22 08:56:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:56:20,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:20,785 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:20,786 INFO L410 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:20,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183616, now seen corresponding path program 1 times [2019-10-22 08:56:20,786 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:20,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881245540] [2019-10-22 08:56:20,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:20,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881245540] [2019-10-22 08:56:20,846 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:20,846 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:56:20,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133817972] [2019-10-22 08:56:20,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:20,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:20,848 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 4 states. [2019-10-22 08:56:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:20,969 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2019-10-22 08:56:20,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:20,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-22 08:56:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:20,971 INFO L225 Difference]: With dead ends: 51 [2019-10-22 08:56:20,971 INFO L226 Difference]: Without dead ends: 51 [2019-10-22 08:56:20,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-22 08:56:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-22 08:56:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 08:56:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-22 08:56:20,977 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 11 [2019-10-22 08:56:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:20,977 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-22 08:56:20,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-22 08:56:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:56:20,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:20,978 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:20,978 INFO L410 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183617, now seen corresponding path program 1 times [2019-10-22 08:56:20,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:20,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936184389] [2019-10-22 08:56:20,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:21,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936184389] [2019-10-22 08:56:21,040 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:21,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:56:21,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84258705] [2019-10-22 08:56:21,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:56:21,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:56:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:56:21,042 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 5 states. [2019-10-22 08:56:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:21,140 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-10-22 08:56:21,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:21,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-10-22 08:56:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:21,142 INFO L225 Difference]: With dead ends: 50 [2019-10-22 08:56:21,142 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 08:56:21,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 08:56:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 08:56:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 08:56:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-22 08:56:21,147 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 11 [2019-10-22 08:56:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:21,147 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-22 08:56:21,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:56:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-22 08:56:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:56:21,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:21,148 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:21,148 INFO L410 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183670, now seen corresponding path program 1 times [2019-10-22 08:56:21,149 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:21,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232355443] [2019-10-22 08:56:21,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:21,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232355443] [2019-10-22 08:56:21,193 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:21,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:56:21,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084876724] [2019-10-22 08:56:21,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:56:21,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:21,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:56:21,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:56:21,195 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 5 states. [2019-10-22 08:56:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:21,280 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2019-10-22 08:56:21,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:21,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-10-22 08:56:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:21,284 INFO L225 Difference]: With dead ends: 56 [2019-10-22 08:56:21,284 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 08:56:21,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 08:56:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2019-10-22 08:56:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 08:56:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-10-22 08:56:21,291 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2019-10-22 08:56:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:21,291 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-10-22 08:56:21,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:56:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-10-22 08:56:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:56:21,292 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:21,292 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:21,292 INFO L410 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1524243252, now seen corresponding path program 1 times [2019-10-22 08:56:21,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:21,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975934341] [2019-10-22 08:56:21,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:21,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975934341] [2019-10-22 08:56:21,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:21,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:56:21,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888423394] [2019-10-22 08:56:21,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:56:21,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:56:21,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:56:21,354 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 5 states. [2019-10-22 08:56:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:21,485 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-10-22 08:56:21,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:21,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-10-22 08:56:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:21,487 INFO L225 Difference]: With dead ends: 60 [2019-10-22 08:56:21,487 INFO L226 Difference]: Without dead ends: 60 [2019-10-22 08:56:21,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-22 08:56:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-10-22 08:56:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-22 08:56:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2019-10-22 08:56:21,492 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 11 [2019-10-22 08:56:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:21,493 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2019-10-22 08:56:21,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:56:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2019-10-22 08:56:21,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:56:21,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:21,497 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:21,497 INFO L410 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash -583933833, now seen corresponding path program 1 times [2019-10-22 08:56:21,498 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:21,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055942198] [2019-10-22 08:56:21,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:21,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055942198] [2019-10-22 08:56:21,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072655048] [2019-10-22 08:56:21,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 08:56:21,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:21,734 INFO L375 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 [2019-10-22 08:56:21,734 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:56:21,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:56:21,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 08:56:21,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 08:56:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:21,766 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:21,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-10-22 08:56:21,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059022578] [2019-10-22 08:56:21,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:56:21,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:21,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:56:21,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:21,768 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2019-10-22 08:56:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:21,930 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-10-22 08:56:21,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:56:21,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-22 08:56:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:21,931 INFO L225 Difference]: With dead ends: 59 [2019-10-22 08:56:21,931 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 08:56:21,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 08:56:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2019-10-22 08:56:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 08:56:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-22 08:56:21,935 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 15 [2019-10-22 08:56:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:21,935 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-22 08:56:21,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:56:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-22 08:56:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 08:56:21,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:21,936 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:22,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:22,140 INFO L410 AbstractCegarLoop]: === Iteration 7 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:22,141 INFO L82 PathProgramCache]: Analyzing trace with hash -269979680, now seen corresponding path program 1 times [2019-10-22 08:56:22,141 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:22,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395694225] [2019-10-22 08:56:22,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:22,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:22,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:22,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395694225] [2019-10-22 08:56:22,308 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:22,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-22 08:56:22,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262712787] [2019-10-22 08:56:22,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:56:22,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:22,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:56:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:22,310 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 10 states. [2019-10-22 08:56:22,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:22,550 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-10-22 08:56:22,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:56:22,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-10-22 08:56:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:22,551 INFO L225 Difference]: With dead ends: 47 [2019-10-22 08:56:22,551 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 08:56:22,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:56:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 08:56:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-22 08:56:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 08:56:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-10-22 08:56:22,558 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 18 [2019-10-22 08:56:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:22,558 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-10-22 08:56:22,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:56:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-10-22 08:56:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 08:56:22,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:22,559 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:22,559 INFO L410 AbstractCegarLoop]: === Iteration 8 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash -269979679, now seen corresponding path program 1 times [2019-10-22 08:56:22,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:22,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48816090] [2019-10-22 08:56:22,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:22,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:22,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:22,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48816090] [2019-10-22 08:56:22,735 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:22,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-22 08:56:22,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475546327] [2019-10-22 08:56:22,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:56:22,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:22,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:56:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:22,736 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2019-10-22 08:56:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:23,020 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2019-10-22 08:56:23,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 08:56:23,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2019-10-22 08:56:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:23,021 INFO L225 Difference]: With dead ends: 57 [2019-10-22 08:56:23,022 INFO L226 Difference]: Without dead ends: 57 [2019-10-22 08:56:23,022 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-10-22 08:56:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-22 08:56:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2019-10-22 08:56:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 08:56:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-10-22 08:56:23,027 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 18 [2019-10-22 08:56:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:23,027 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-10-22 08:56:23,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:56:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-10-22 08:56:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 08:56:23,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:23,028 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:23,028 INFO L410 AbstractCegarLoop]: === Iteration 9 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash -463192456, now seen corresponding path program 1 times [2019-10-22 08:56:23,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:23,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301429155] [2019-10-22 08:56:23,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:23,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:23,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:23,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301429155] [2019-10-22 08:56:23,080 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:23,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:56:23,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760354312] [2019-10-22 08:56:23,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:56:23,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:56:23,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:56:23,082 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 5 states. [2019-10-22 08:56:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:23,188 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2019-10-22 08:56:23,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:23,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-22 08:56:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:23,190 INFO L225 Difference]: With dead ends: 55 [2019-10-22 08:56:23,190 INFO L226 Difference]: Without dead ends: 55 [2019-10-22 08:56:23,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-22 08:56:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-22 08:56:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-22 08:56:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2019-10-22 08:56:23,202 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2019-10-22 08:56:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:23,202 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2019-10-22 08:56:23,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:56:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2019-10-22 08:56:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-22 08:56:23,203 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:23,203 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:23,203 INFO L410 AbstractCegarLoop]: === Iteration 10 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:23,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:23,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1542788213, now seen corresponding path program 1 times [2019-10-22 08:56:23,204 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:23,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707524974] [2019-10-22 08:56:23,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:23,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:23,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:23,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707524974] [2019-10-22 08:56:23,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:23,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2019-10-22 08:56:23,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442836850] [2019-10-22 08:56:23,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 08:56:23,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:23,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 08:56:23,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:56:23,411 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 14 states. [2019-10-22 08:56:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:23,803 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2019-10-22 08:56:23,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 08:56:23,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-10-22 08:56:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:23,804 INFO L225 Difference]: With dead ends: 81 [2019-10-22 08:56:23,804 INFO L226 Difference]: Without dead ends: 81 [2019-10-22 08:56:23,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2019-10-22 08:56:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-22 08:56:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2019-10-22 08:56:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-22 08:56:23,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2019-10-22 08:56:23,810 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 24 [2019-10-22 08:56:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:23,810 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2019-10-22 08:56:23,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 08:56:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2019-10-22 08:56:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-22 08:56:23,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:23,811 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:23,811 INFO L410 AbstractCegarLoop]: === Iteration 11 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -45559689, now seen corresponding path program 1 times [2019-10-22 08:56:23,811 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:23,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766929605] [2019-10-22 08:56:23,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:23,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:23,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:24,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766929605] [2019-10-22 08:56:24,002 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:24,002 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2019-10-22 08:56:24,002 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999793862] [2019-10-22 08:56:24,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 08:56:24,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:24,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 08:56:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:56:24,003 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 15 states. [2019-10-22 08:56:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:24,439 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2019-10-22 08:56:24,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 08:56:24,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2019-10-22 08:56:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:24,440 INFO L225 Difference]: With dead ends: 101 [2019-10-22 08:56:24,440 INFO L226 Difference]: Without dead ends: 101 [2019-10-22 08:56:24,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2019-10-22 08:56:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-22 08:56:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2019-10-22 08:56:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-22 08:56:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2019-10-22 08:56:24,445 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 24 [2019-10-22 08:56:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:24,445 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2019-10-22 08:56:24,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 08:56:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2019-10-22 08:56:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:56:24,446 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:24,446 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:24,446 INFO L410 AbstractCegarLoop]: === Iteration 12 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056224, now seen corresponding path program 1 times [2019-10-22 08:56:24,447 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:24,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163957091] [2019-10-22 08:56:24,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:24,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163957091] [2019-10-22 08:56:24,557 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:24,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-22 08:56:24,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412293404] [2019-10-22 08:56:24,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:56:24,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:56:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:24,558 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 12 states. [2019-10-22 08:56:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:24,860 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-22 08:56:24,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:56:24,861 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-10-22 08:56:24,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:24,862 INFO L225 Difference]: With dead ends: 80 [2019-10-22 08:56:24,862 INFO L226 Difference]: Without dead ends: 80 [2019-10-22 08:56:24,863 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:56:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-22 08:56:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-22 08:56:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-22 08:56:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2019-10-22 08:56:24,868 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2019-10-22 08:56:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:24,869 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2019-10-22 08:56:24,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:56:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2019-10-22 08:56:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:56:24,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:24,870 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:24,870 INFO L410 AbstractCegarLoop]: === Iteration 13 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056223, now seen corresponding path program 1 times [2019-10-22 08:56:24,871 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:24,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828648641] [2019-10-22 08:56:24,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:25,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828648641] [2019-10-22 08:56:25,093 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:25,093 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-22 08:56:25,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216732373] [2019-10-22 08:56:25,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:56:25,094 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:56:25,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:56:25,095 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 13 states. [2019-10-22 08:56:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:25,417 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2019-10-22 08:56:25,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 08:56:25,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-10-22 08:56:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:25,419 INFO L225 Difference]: With dead ends: 88 [2019-10-22 08:56:25,419 INFO L226 Difference]: Without dead ends: 88 [2019-10-22 08:56:25,419 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:56:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-22 08:56:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2019-10-22 08:56:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-22 08:56:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2019-10-22 08:56:25,424 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 27 [2019-10-22 08:56:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:25,425 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2019-10-22 08:56:25,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:56:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2019-10-22 08:56:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:56:25,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:25,426 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:25,426 INFO L410 AbstractCegarLoop]: === Iteration 14 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:25,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1917209182, now seen corresponding path program 1 times [2019-10-22 08:56:25,426 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:25,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508923398] [2019-10-22 08:56:25,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:25,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:25,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:25,469 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:25,469 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:56:25,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:56:25 BoogieIcfgContainer [2019-10-22 08:56:25,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:56:25,494 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:25,494 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:25,494 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:25,494 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:20" (3/4) ... [2019-10-22 08:56:25,496 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:56:25,537 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_86f9e48b-bf48-48ba-94c0-ff9bc4202ad8/bin/uautomizer/witness.graphml [2019-10-22 08:56:25,537 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:25,539 INFO L168 Benchmark]: Toolchain (without parser) took 6334.24 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 267.9 MB). Free memory was 944.4 MB in the beginning and 1.2 GB in the end (delta: -270.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:25,539 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:25,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 485.00 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 944.4 MB in the beginning and 1.1 GB in the end (delta: -133.0 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:25,540 INFO L168 Benchmark]: Boogie Preprocessor took 46.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:25,540 INFO L168 Benchmark]: RCFGBuilder took 622.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:25,540 INFO L168 Benchmark]: TraceAbstraction took 5131.73 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 172.0 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -203.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:25,541 INFO L168 Benchmark]: Witness Printer took 44.06 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:25,543 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 485.00 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 944.4 MB in the beginning and 1.1 GB in the end (delta: -133.0 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 46.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 622.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5131.73 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 172.0 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -203.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 44.06 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 537]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L536] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, malloc(length * sizeof(char))={2:0}, nondetString={2:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, malloc(length * sizeof(char))={2:0}, nondetString={2:0}] [L526] nondetString[length-1] = '\0' VAL [i=0, length=1, malloc(length * sizeof(char))={2:0}, nondetString={2:0}] [L527] return nondetString; VAL [\result={2:0}, i=0, length=1, malloc(length * sizeof(char))={2:0}, nondetString={2:0}] [L536] RET, EXPR build_nondet_String() VAL [build_nondet_String()={2:0}] [L536] char* s = build_nondet_String(); [L537] CALL cstrchr(s,__VERIFIER_nondet_int()) VAL [\old(c)=1, s={2:0}] [L531] EXPR \read(*s) VAL [\old(c)=1, \read(*s)=0, c=1, s={2:0}, s={2:0}] [L531] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=1, \read(*s)=0, c=1, s={2:0}, s={2:0}] [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) VAL [\old(c)=1, \read(*s)=0, c=1, s={2:0}, s={2:0}] [L533] EXPR (*s == c) ? (char *) s : 0 VAL [(*s == c) ? (char *) s : 0={0:0}, \old(c)=1, \read(*s)=0, c=1, s={2:0}, s={2:0}] [L533] return ( (*s == c) ? (char *) s : 0 ); [L537] RET cstrchr(s,__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=1, cstrchr(s,__VERIFIER_nondet_int())={0:0}, s={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 71 locations, 16 error locations. Result: UNSAFE, OverallTime: 5.0s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 456 SDtfs, 844 SDslu, 807 SDs, 0 SdLazy, 2463 SolverSat, 122 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 66 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 20896 SizeOfPredicates, 3 NumberOfNonLiveVariables, 68 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 5/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...