./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/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 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-a4ecdab [2020-11-28 03:00:24,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:00:24,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:00:24,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:00:24,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:00:24,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:00:24,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:00:24,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:00:24,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:00:24,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:00:24,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:00:24,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:00:24,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:00:24,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:00:24,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:00:24,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:00:24,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:00:24,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:00:24,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:00:24,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:00:24,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:00:24,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:00:24,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:00:24,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:00:24,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:00:24,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:00:24,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:00:24,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:00:24,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:00:24,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:00:24,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:00:24,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:00:24,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:00:24,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:00:24,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:00:24,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:00:24,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:00:24,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:00:24,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:00:24,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:00:24,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:00:24,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:00:24,891 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:00:24,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:00:24,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:00:24,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:00:24,894 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:00:24,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:00:24,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:00:24,895 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:00:24,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:00:24,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:00:24,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:00:24,896 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:00:24,897 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:00:24,897 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:00:24,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:00:24,897 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:00:24,897 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:00:24,898 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:00:24,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:00:24,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:00:24,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:00:24,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:00:24,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:00:24,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:00:24,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:00:24,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:00:24,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:00:24,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:00:24,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2020-11-28 03:00:25,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:00:25,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:00:25,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:00:25,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:00:25,226 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:00:25,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-11-28 03:00:25,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/data/51dc8718a/7c2a340b98834421abcdedd2e3d31b93/FLAG664e4ba8b [2020-11-28 03:00:25,985 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:00:25,985 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-11-28 03:00:26,010 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/data/51dc8718a/7c2a340b98834421abcdedd2e3d31b93/FLAG664e4ba8b [2020-11-28 03:00:26,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/data/51dc8718a/7c2a340b98834421abcdedd2e3d31b93 [2020-11-28 03:00:26,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:00:26,199 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:00:26,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:00:26,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:00:26,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:00:26,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc7de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26, skipping insertion in model container [2020-11-28 03:00:26,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:00:26,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:00:26,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:00:26,544 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:00:26,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:00:26,676 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:00:26,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26 WrapperNode [2020-11-28 03:00:26,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:00:26,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:00:26,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:00:26,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:00:26,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (1/1) ... [2020-11-28 03:00:26,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:00:26,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:00:26,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:00:26,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:00:26,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/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 [2020-11-28 03:00:26,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:00:26,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:00:26,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-28 03:00:26,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-28 03:00:26,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-28 03:00:26,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-28 03:00:26,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-28 03:00:26,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:00:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-28 03:00:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-28 03:00:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-28 03:00:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-28 03:00:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-28 03:00:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-28 03:00:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-28 03:00:26,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-28 03:00:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-28 03:00:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-28 03:00:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-28 03:00:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-28 03:00:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-28 03:00:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-28 03:00:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-28 03:00:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-28 03:00:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-28 03:00:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-28 03:00:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-28 03:00:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-28 03:00:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-28 03:00:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-28 03:00:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-28 03:00:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-28 03:00:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-28 03:00:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-28 03:00:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-28 03:00:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-28 03:00:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-28 03:00:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-28 03:00:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-28 03:00:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-28 03:00:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-28 03:00:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-28 03:00:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-28 03:00:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-28 03:00:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-28 03:00:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-28 03:00:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-28 03:00:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-28 03:00:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-28 03:00:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-28 03:00:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-28 03:00:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-28 03:00:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-28 03:00:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-28 03:00:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-28 03:00:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-28 03:00:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-28 03:00:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-28 03:00:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-28 03:00:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-28 03:00:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-28 03:00:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-28 03:00:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-28 03:00:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-28 03:00:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-28 03:00:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-28 03:00:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-28 03:00:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-28 03:00:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-28 03:00:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-28 03:00:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-28 03:00:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 03:00:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-28 03:00:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-28 03:00:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-28 03:00:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-28 03:00:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-28 03:00:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-28 03:00:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-28 03:00:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-28 03:00:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-28 03:00:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-28 03:00:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-28 03:00:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-28 03:00:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-28 03:00:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-28 03:00:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-28 03:00:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-28 03:00:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-28 03:00:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-28 03:00:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-28 03:00:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-28 03:00:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-28 03:00:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-28 03:00:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-28 03:00:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-28 03:00:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-28 03:00:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-28 03:00:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-28 03:00:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-28 03:00:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-28 03:00:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-28 03:00:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-28 03:00:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-28 03:00:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-28 03:00:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-28 03:00:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-28 03:00:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-28 03:00:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-28 03:00:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-28 03:00:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-28 03:00:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-28 03:00:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-28 03:00:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-28 03:00:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-28 03:00:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:00:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-28 03:00:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:00:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:00:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:00:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:00:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:00:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:00:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:00:27,560 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:00:27,560 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-28 03:00:27,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:00:27 BoogieIcfgContainer [2020-11-28 03:00:27,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:00:27,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:00:27,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:00:27,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:00:27,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:00:26" (1/3) ... [2020-11-28 03:00:27,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1280fb1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:00:27, skipping insertion in model container [2020-11-28 03:00:27,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:26" (2/3) ... [2020-11-28 03:00:27,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1280fb1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:00:27, skipping insertion in model container [2020-11-28 03:00:27,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:00:27" (3/3) ... [2020-11-28 03:00:27,576 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2020-11-28 03:00:27,588 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:00:27,592 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-11-28 03:00:27,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-11-28 03:00:27,632 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:00:27,632 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:00:27,632 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:00:27,633 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:00:27,638 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:00:27,638 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:00:27,638 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:00:27,639 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:00:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-11-28 03:00:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:00:27,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:27,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:27,667 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:27,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2020-11-28 03:00:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:27,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524093739] [2020-11-28 03:00:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:27,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:27,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524093739] [2020-11-28 03:00:27,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:27,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:00:27,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444543772] [2020-11-28 03:00:27,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:00:27,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:28,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:00:28,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:00:28,007 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 6 states. [2020-11-28 03:00:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:28,442 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2020-11-28 03:00:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:00:28,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-28 03:00:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:28,464 INFO L225 Difference]: With dead ends: 125 [2020-11-28 03:00:28,464 INFO L226 Difference]: Without dead ends: 121 [2020-11-28 03:00:28,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:00:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-28 03:00:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2020-11-28 03:00:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 03:00:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-11-28 03:00:28,509 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2020-11-28 03:00:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:28,510 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-11-28 03:00:28,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:00:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-11-28 03:00:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:00:28,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:28,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:28,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:00:28,512 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:28,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2020-11-28 03:00:28,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:28,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113135291] [2020-11-28 03:00:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:28,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:28,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113135291] [2020-11-28 03:00:28,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:28,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:00:28,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989475649] [2020-11-28 03:00:28,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:00:28,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:28,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:00:28,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:00:28,571 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 4 states. [2020-11-28 03:00:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:28,713 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-11-28 03:00:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:00:28,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:00:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:28,715 INFO L225 Difference]: With dead ends: 60 [2020-11-28 03:00:28,715 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 03:00:28,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:00:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 03:00:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-28 03:00:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 03:00:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-28 03:00:28,722 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2020-11-28 03:00:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:28,723 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-28 03:00:28,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:00:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-28 03:00:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:00:28,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:28,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:28,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:00:28,724 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:28,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2020-11-28 03:00:28,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:28,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270259160] [2020-11-28 03:00:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:28,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:28,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270259160] [2020-11-28 03:00:28,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:28,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:00:28,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185139022] [2020-11-28 03:00:28,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:00:28,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:28,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:00:28,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:00:28,792 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 5 states. [2020-11-28 03:00:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:28,983 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-11-28 03:00:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:00:28,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:00:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:28,984 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:00:28,984 INFO L226 Difference]: Without dead ends: 64 [2020-11-28 03:00:28,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:00:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-28 03:00:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-28 03:00:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 03:00:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-11-28 03:00:28,990 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2020-11-28 03:00:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:28,990 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-11-28 03:00:28,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:00:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-11-28 03:00:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:00:28,991 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:28,991 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:28,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:00:28,991 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2020-11-28 03:00:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:28,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123115936] [2020-11-28 03:00:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:29,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:00:29,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123115936] [2020-11-28 03:00:29,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:29,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:00:29,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655952485] [2020-11-28 03:00:29,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:00:29,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:00:29,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:00:29,093 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 4 states. [2020-11-28 03:00:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:29,215 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-11-28 03:00:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:00:29,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-28 03:00:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:29,217 INFO L225 Difference]: With dead ends: 60 [2020-11-28 03:00:29,217 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 03:00:29,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:00:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 03:00:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-28 03:00:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 03:00:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-28 03:00:29,223 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2020-11-28 03:00:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:29,223 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-28 03:00:29,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:00:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-28 03:00:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:00:29,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:29,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:29,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:00:29,224 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:29,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2020-11-28 03:00:29,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:29,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926316728] [2020-11-28 03:00:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:29,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:29,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926316728] [2020-11-28 03:00:29,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477926552] [2020-11-28 03:00:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/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 [2020-11-28 03:00:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:00:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:29,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:00:29,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2020-11-28 03:00:29,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660085996] [2020-11-28 03:00:29,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:00:29,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:00:29,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:00:29,722 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 5 states. [2020-11-28 03:00:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:29,780 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2020-11-28 03:00:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:00:29,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-28 03:00:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:29,787 INFO L225 Difference]: With dead ends: 109 [2020-11-28 03:00:29,787 INFO L226 Difference]: Without dead ends: 109 [2020-11-28 03:00:29,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:00:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-28 03:00:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2020-11-28 03:00:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-28 03:00:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-11-28 03:00:29,793 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2020-11-28 03:00:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:29,794 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-11-28 03:00:29,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:00:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-11-28 03:00:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:00:29,795 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:29,795 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:30,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:30,010 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:30,010 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2020-11-28 03:00:30,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:30,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103768948] [2020-11-28 03:00:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:30,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:30,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103768948] [2020-11-28 03:00:30,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211010682] [2020-11-28 03:00:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:30,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-28 03:00:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:30,356 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-11-28 03:00:30,358 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:30,373 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:30,373 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:00:30,374 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2020-11-28 03:00:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:30,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:30,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-11-28 03:00:30,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553750063] [2020-11-28 03:00:30,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:00:30,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:30,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:00:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:00:30,503 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 11 states. [2020-11-28 03:00:31,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:31,013 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2020-11-28 03:00:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:00:31,014 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-28 03:00:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:31,015 INFO L225 Difference]: With dead ends: 170 [2020-11-28 03:00:31,015 INFO L226 Difference]: Without dead ends: 170 [2020-11-28 03:00:31,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:00:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-28 03:00:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 76. [2020-11-28 03:00:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-28 03:00:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-11-28 03:00:31,024 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 15 [2020-11-28 03:00:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:31,024 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-11-28 03:00:31,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:00:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-11-28 03:00:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:00:31,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:31,025 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:31,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:31,254 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2020-11-28 03:00:31,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:31,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153376008] [2020-11-28 03:00:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:31,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:31,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153376008] [2020-11-28 03:00:31,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122119098] [2020-11-28 03:00:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:31,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:00:31,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:31,503 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-11-28 03:00:31,503 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:31,518 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:31,518 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:00:31,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2020-11-28 03:00:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:31,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:31,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-11-28 03:00:31,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546150487] [2020-11-28 03:00:31,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:00:31,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:00:31,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:00:31,651 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 11 states. [2020-11-28 03:00:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:32,069 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2020-11-28 03:00:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:00:32,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-28 03:00:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:32,071 INFO L225 Difference]: With dead ends: 126 [2020-11-28 03:00:32,071 INFO L226 Difference]: Without dead ends: 126 [2020-11-28 03:00:32,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:00:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-28 03:00:32,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 78. [2020-11-28 03:00:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-28 03:00:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-11-28 03:00:32,084 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 15 [2020-11-28 03:00:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:32,087 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-11-28 03:00:32,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:00:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-11-28 03:00:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:00:32,088 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:32,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:32,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:32,302 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2020-11-28 03:00:32,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:32,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717918312] [2020-11-28 03:00:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:32,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:00:32,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717918312] [2020-11-28 03:00:32,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:32,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:00:32,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272996896] [2020-11-28 03:00:32,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:00:32,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:00:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:00:32,366 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 5 states. [2020-11-28 03:00:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:32,510 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-11-28 03:00:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:00:32,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-28 03:00:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:32,511 INFO L225 Difference]: With dead ends: 89 [2020-11-28 03:00:32,511 INFO L226 Difference]: Without dead ends: 89 [2020-11-28 03:00:32,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:00:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-28 03:00:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-11-28 03:00:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-28 03:00:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-11-28 03:00:32,517 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 17 [2020-11-28 03:00:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:32,518 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-11-28 03:00:32,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:00:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-11-28 03:00:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:00:32,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:32,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:32,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:00:32,519 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2020-11-28 03:00:32,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:32,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349822981] [2020-11-28 03:00:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:32,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:32,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349822981] [2020-11-28 03:00:32,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327039623] [2020-11-28 03:00:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:32,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:00:32,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:32,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:32,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-11-28 03:00:32,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292658583] [2020-11-28 03:00:32,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:00:32,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:32,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:00:32,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:00:32,826 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 9 states. [2020-11-28 03:00:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:33,099 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-11-28 03:00:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:00:33,099 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-28 03:00:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:33,100 INFO L225 Difference]: With dead ends: 86 [2020-11-28 03:00:33,100 INFO L226 Difference]: Without dead ends: 86 [2020-11-28 03:00:33,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:00:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-28 03:00:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-11-28 03:00:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-28 03:00:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-11-28 03:00:33,106 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 17 [2020-11-28 03:00:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:33,106 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-11-28 03:00:33,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:00:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-11-28 03:00:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:00:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:33,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:33,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:33,327 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-11-28 03:00:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2020-11-28 03:00:33,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:33,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793954591] [2020-11-28 03:00:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:00:33,388 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:00:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:00:33,408 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:00:33,443 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:00:33,443 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:00:33,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:00:33,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:00:33 BoogieIcfgContainer [2020-11-28 03:00:33,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:00:33,464 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:00:33,464 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:00:33,464 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:00:33,465 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:00:27" (3/4) ... [2020-11-28 03:00:33,466 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:00:33,503 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0464b02b-7083-48d9-a402-a51f0b38a252/bin/uautomizer/witness.graphml [2020-11-28 03:00:33,503 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:00:33,504 INFO L168 Benchmark]: Toolchain (without parser) took 7304.84 ms. Allocated memory was 86.0 MB in the beginning and 157.3 MB in the end (delta: 71.3 MB). Free memory was 62.6 MB in the beginning and 81.0 MB in the end (delta: -18.4 MB). Peak memory consumption was 54.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:33,504 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 71.3 MB. Free memory is still 39.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:00:33,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.41 ms. Allocated memory is still 86.0 MB. Free memory was 62.4 MB in the beginning and 41.9 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:33,505 INFO L168 Benchmark]: Boogie Preprocessor took 52.49 ms. Allocated memory is still 86.0 MB. Free memory was 41.9 MB in the beginning and 39.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:33,506 INFO L168 Benchmark]: RCFGBuilder took 830.01 ms. Allocated memory is still 86.0 MB. Free memory was 39.4 MB in the beginning and 60.8 MB in the end (delta: -21.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:33,507 INFO L168 Benchmark]: TraceAbstraction took 5900.33 ms. Allocated memory was 86.0 MB in the beginning and 157.3 MB in the end (delta: 71.3 MB). Free memory was 60.5 MB in the beginning and 83.1 MB in the end (delta: -22.5 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:33,507 INFO L168 Benchmark]: Witness Printer took 38.72 ms. Allocated memory is still 157.3 MB. Free memory was 83.1 MB in the beginning and 81.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:33,509 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 71.3 MB. Free memory is still 39.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 478.41 ms. Allocated memory is still 86.0 MB. Free memory was 62.4 MB in the beginning and 41.9 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.49 ms. Allocated memory is still 86.0 MB. Free memory was 41.9 MB in the beginning and 39.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 830.01 ms. Allocated memory is still 86.0 MB. Free memory was 39.4 MB in the beginning and 60.8 MB in the end (delta: -21.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5900.33 ms. Allocated memory was 86.0 MB in the beginning and 157.3 MB in the end (delta: 71.3 MB). Free memory was 60.5 MB in the beginning and 83.1 MB in the end (delta: -22.5 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. * Witness Printer took 38.72 ms. Allocated memory is still 157.3 MB. Free memory was 83.1 MB in the beginning and 81.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L518] COND FALSE !(length % 2 == 0) VAL [length=1] [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, length=1] [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() VAL [__builtin_alloca (length*sizeof(int))={2:0}, __VERIFIER_nondet_int()=-1, arr={2:0}, i=0, length=1] [L521] i++ VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L521] COND FALSE !(i < length) VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L526] i=0 VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, i=1, length=1] [L526] COND TRUE i