./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_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/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 [2020-11-30 01:20:49,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:20:49,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:20:50,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:20:50,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:20:50,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:20:50,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:20:50,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:20:50,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:20:50,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:20:50,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:20:50,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:20:50,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:20:50,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:20:50,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:20:50,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:20:50,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:20:50,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:20:50,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:20:50,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:20:50,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:20:50,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:20:50,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:20:50,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:20:50,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:20:50,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:20:50,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:20:50,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:20:50,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:20:50,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:20:50,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:20:50,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:20:50,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:20:50,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:20:50,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:20:50,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:20:50,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:20:50,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:20:50,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:20:50,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:20:50,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:20:50,065 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-30 01:20:50,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:20:50,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:20:50,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:20:50,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:20:50,089 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:20:50,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:20:50,090 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:20:50,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:20:50,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:20:50,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:20:50,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:20:50,091 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:20:50,091 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:20:50,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:20:50,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:20:50,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:20:50,092 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:20:50,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:20:50,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:20:50,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:20:50,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:20:50,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:20:50,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:20:50,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:20:50,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:20:50,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:20:50,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:20:50,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:20:50,095 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_84432fc3-8c6e-463b-b040-82c37fc9d43a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2020-11-30 01:20:50,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:20:50,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:20:50,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:20:50,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:20:50,403 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:20:50,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-11-30 01:20:50,487 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/data/61a598113/2a4793cb7f9b48d78304c7eab4ed5b77/FLAG216f96d16 [2020-11-30 01:20:50,995 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:20:51,000 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-11-30 01:20:51,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/data/61a598113/2a4793cb7f9b48d78304c7eab4ed5b77/FLAG216f96d16 [2020-11-30 01:20:51,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/data/61a598113/2a4793cb7f9b48d78304c7eab4ed5b77 [2020-11-30 01:20:51,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:20:51,344 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-30 01:20:51,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:20:51,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:20:51,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:20:51,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@efa0839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51, skipping insertion in model container [2020-11-30 01:20:51,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:20:51,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:20:51,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:20:51,774 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:20:51,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:20:51,899 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:20:51,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51 WrapperNode [2020-11-30 01:20:51,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:20:51,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:20:51,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:20:51,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:20:51,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (1/1) ... [2020-11-30 01:20:51,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:20:51,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:20:51,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:20:51,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:20:51,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/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 [2020-11-30 01:20:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-30 01:20:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:20:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-30 01:20:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-30 01:20:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-30 01:20:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-30 01:20:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-30 01:20:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-30 01:20:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-30 01:20:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-30 01:20:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-30 01:20:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-30 01:20:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-30 01:20:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-30 01:20:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-30 01:20:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-30 01:20:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-30 01:20:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-30 01:20:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-30 01:20:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-30 01:20:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-30 01:20:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-30 01:20:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-30 01:20:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-30 01:20:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-30 01:20:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-30 01:20:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-30 01:20:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-30 01:20:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-30 01:20:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-30 01:20:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-30 01:20:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-30 01:20:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-30 01:20:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-30 01:20:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-30 01:20:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-30 01:20:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-30 01:20:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-30 01:20:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-30 01:20:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-30 01:20:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-30 01:20:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-30 01:20:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-30 01:20:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-30 01:20:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-30 01:20:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-30 01:20:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-30 01:20:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-30 01:20:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-30 01:20:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-30 01:20:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-30 01:20:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-30 01:20:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-30 01:20:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-30 01:20:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-30 01:20:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-30 01:20:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-30 01:20:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-30 01:20:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-30 01:20:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-30 01:20:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-30 01:20:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-30 01:20:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-30 01:20:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-30 01:20:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-30 01:20:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-30 01:20:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-30 01:20:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-30 01:20:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-30 01:20:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-30 01:20:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-30 01:20:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-30 01:20:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-30 01:20:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-30 01:20:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-30 01:20:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-30 01:20:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-30 01:20:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-30 01:20:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-30 01:20:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-30 01:20:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-30 01:20:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-30 01:20:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-30 01:20:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-30 01:20:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-30 01:20:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-30 01:20:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-30 01:20:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-30 01:20:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-30 01:20:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-30 01:20:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-30 01:20:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-30 01:20:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-30 01:20:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-30 01:20:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-30 01:20:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-30 01:20:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-30 01:20:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-30 01:20:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-30 01:20:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-30 01:20:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-30 01:20:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-30 01:20:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-30 01:20:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-30 01:20:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-30 01:20:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-30 01:20:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-30 01:20:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-30 01:20:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-30 01:20:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-30 01:20:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-30 01:20:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-30 01:20:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-30 01:20:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-30 01:20:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-30 01:20:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-30 01:20:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-30 01:20:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-30 01:20:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:20:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:20:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:20:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:20:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-30 01:20:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:20:52,908 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:20:52,908 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-30 01:20:52,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:20:52 BoogieIcfgContainer [2020-11-30 01:20:52,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:20:52,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:20:52,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:20:52,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:20:52,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:20:51" (1/3) ... [2020-11-30 01:20:52,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13527253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:20:52, skipping insertion in model container [2020-11-30 01:20:52,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:20:51" (2/3) ... [2020-11-30 01:20:52,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13527253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:20:52, skipping insertion in model container [2020-11-30 01:20:52,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:20:52" (3/3) ... [2020-11-30 01:20:52,925 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2020-11-30 01:20:52,942 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:20:52,947 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-11-30 01:20:52,956 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-11-30 01:20:52,977 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:20:52,977 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:20:52,977 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:20:52,977 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:20:52,977 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:20:52,977 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:20:52,977 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:20:52,978 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:20:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-11-30 01:20:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:20:53,001 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:53,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:53,002 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]=== [2020-11-30 01:20:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:53,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2020-11-30 01:20:53,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:53,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133872553] [2020-11-30 01:20:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:53,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:53,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133872553] [2020-11-30 01:20:53,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:20:53,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:20:53,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125812719] [2020-11-30 01:20:53,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:20:53,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:20:53,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:20:53,293 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 6 states. [2020-11-30 01:20:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:54,026 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2020-11-30 01:20:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:20:54,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-30 01:20:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:54,045 INFO L225 Difference]: With dead ends: 125 [2020-11-30 01:20:54,046 INFO L226 Difference]: Without dead ends: 121 [2020-11-30 01:20:54,047 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 [2020-11-30 01:20:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-30 01:20:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2020-11-30 01:20:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-30 01:20:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-11-30 01:20:54,086 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2020-11-30 01:20:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:54,086 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-11-30 01:20:54,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:20:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-11-30 01:20:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:20:54,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:54,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:54,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:20:54,088 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]=== [2020-11-30 01:20:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2020-11-30 01:20:54,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:54,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224221037] [2020-11-30 01:20:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:54,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:54,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224221037] [2020-11-30 01:20:54,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:20:54,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:20:54,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329550878] [2020-11-30 01:20:54,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:20:54,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:54,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:20:54,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:20:54,196 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 4 states. [2020-11-30 01:20:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:54,385 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-11-30 01:20:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:20:54,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-30 01:20:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:54,387 INFO L225 Difference]: With dead ends: 60 [2020-11-30 01:20:54,387 INFO L226 Difference]: Without dead ends: 60 [2020-11-30 01:20:54,388 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 [2020-11-30 01:20:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-30 01:20:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-30 01:20:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-30 01:20:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-30 01:20:54,407 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2020-11-30 01:20:54,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:54,408 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-30 01:20:54,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:20:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-30 01:20:54,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:20:54,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:54,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:54,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:20:54,411 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]=== [2020-11-30 01:20:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:54,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2020-11-30 01:20:54,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:54,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071710346] [2020-11-30 01:20:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:54,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:54,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071710346] [2020-11-30 01:20:54,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:20:54,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:20:54,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224007249] [2020-11-30 01:20:54,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:20:54,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:54,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:20:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:20:54,562 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 5 states. [2020-11-30 01:20:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:54,772 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-11-30 01:20:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:20:54,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:20:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:54,773 INFO L225 Difference]: With dead ends: 64 [2020-11-30 01:20:54,773 INFO L226 Difference]: Without dead ends: 64 [2020-11-30 01:20:54,774 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 [2020-11-30 01:20:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-30 01:20:54,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-30 01:20:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-30 01:20:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-11-30 01:20:54,780 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2020-11-30 01:20:54,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:54,780 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-11-30 01:20:54,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:20:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-11-30 01:20:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:20:54,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:54,782 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:54,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:20:54,782 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]=== [2020-11-30 01:20:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:54,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2020-11-30 01:20:54,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:54,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27245312] [2020-11-30 01:20:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:54,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:20:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27245312] [2020-11-30 01:20:54,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:20:54,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:20:54,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147771332] [2020-11-30 01:20:54,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:20:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:20:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:20:54,870 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 4 states. [2020-11-30 01:20:55,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:55,036 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-11-30 01:20:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:20:55,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-30 01:20:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:55,037 INFO L225 Difference]: With dead ends: 60 [2020-11-30 01:20:55,037 INFO L226 Difference]: Without dead ends: 60 [2020-11-30 01:20:55,038 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 [2020-11-30 01:20:55,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-30 01:20:55,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-30 01:20:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-30 01:20:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-30 01:20:55,043 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2020-11-30 01:20:55,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:55,043 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-30 01:20:55,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:20:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-30 01:20:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:20:55,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:55,044 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:55,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:20:55,045 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]=== [2020-11-30 01:20:55,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:55,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2020-11-30 01:20:55,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:55,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287811129] [2020-11-30 01:20:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:55,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:55,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287811129] [2020-11-30 01:20:55,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048291314] [2020-11-30 01:20:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/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 [2020-11-30 01:20:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:55,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:20:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:20:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:55,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:20:55,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2020-11-30 01:20:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617653369] [2020-11-30 01:20:55,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:20:55,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:20:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:20:55,557 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 5 states. [2020-11-30 01:20:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:55,638 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2020-11-30 01:20:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:20:55,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-30 01:20:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:55,645 INFO L225 Difference]: With dead ends: 109 [2020-11-30 01:20:55,645 INFO L226 Difference]: Without dead ends: 109 [2020-11-30 01:20:55,645 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 [2020-11-30 01:20:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-30 01:20:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2020-11-30 01:20:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-30 01:20:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-11-30 01:20:55,655 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2020-11-30 01:20:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:55,655 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-11-30 01:20:55,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:20:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-11-30 01:20:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:20:55,656 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:55,656 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:55,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:20:55,857 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]=== [2020-11-30 01:20:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2020-11-30 01:20:55,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:55,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840525593] [2020-11-30 01:20:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:55,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:55,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840525593] [2020-11-30 01:20:55,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924235478] [2020-11-30 01:20:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/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 [2020-11-30 01:20:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:56,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 01:20:56,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:20:56,228 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 [2020-11-30 01:20:56,229 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:20:56,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:20:56,244 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:20:56,244 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2020-11-30 01:20:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:56,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:20:56,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-11-30 01:20:56,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643187496] [2020-11-30 01:20:56,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:20:56,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:56,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:20:56,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:20:56,368 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 11 states. [2020-11-30 01:20:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:56,943 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2020-11-30 01:20:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:20:56,943 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-30 01:20:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:56,945 INFO L225 Difference]: With dead ends: 170 [2020-11-30 01:20:56,945 INFO L226 Difference]: Without dead ends: 170 [2020-11-30 01:20:56,946 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 [2020-11-30 01:20:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-30 01:20:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 76. [2020-11-30 01:20:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-30 01:20:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-11-30 01:20:56,965 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 15 [2020-11-30 01:20:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:56,965 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-11-30 01:20:56,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:20:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-11-30 01:20:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:20:56,968 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:56,968 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:57,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:20:57,188 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]=== [2020-11-30 01:20:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:57,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2020-11-30 01:20:57,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:57,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940908071] [2020-11-30 01:20:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:57,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940908071] [2020-11-30 01:20:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096745929] [2020-11-30 01:20:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/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 [2020-11-30 01:20:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:57,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 01:20:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:20:57,507 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 [2020-11-30 01:20:57,507 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:20:57,518 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:20:57,518 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:20:57,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2020-11-30 01:20:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:57,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:20:57,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-11-30 01:20:57,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580294908] [2020-11-30 01:20:57,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:20:57,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:57,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:20:57,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:20:57,627 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 11 states. [2020-11-30 01:20:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:58,029 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2020-11-30 01:20:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:20:58,030 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-30 01:20:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:58,031 INFO L225 Difference]: With dead ends: 126 [2020-11-30 01:20:58,031 INFO L226 Difference]: Without dead ends: 126 [2020-11-30 01:20:58,031 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 [2020-11-30 01:20:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-30 01:20:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 78. [2020-11-30 01:20:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 01:20:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-11-30 01:20:58,038 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 15 [2020-11-30 01:20:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:58,038 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-11-30 01:20:58,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:20:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-11-30 01:20:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:20:58,039 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:58,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:58,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:20:58,264 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]=== [2020-11-30 01:20:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2020-11-30 01:20:58,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:58,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306035397] [2020-11-30 01:20:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:58,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:20:58,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306035397] [2020-11-30 01:20:58,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:20:58,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:20:58,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4771473] [2020-11-30 01:20:58,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:20:58,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:20:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:20:58,329 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 5 states. [2020-11-30 01:20:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:58,470 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-11-30 01:20:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:20:58,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-30 01:20:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:58,471 INFO L225 Difference]: With dead ends: 89 [2020-11-30 01:20:58,471 INFO L226 Difference]: Without dead ends: 89 [2020-11-30 01:20:58,472 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 [2020-11-30 01:20:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-30 01:20:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-11-30 01:20:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 01:20:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-11-30 01:20:58,477 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 17 [2020-11-30 01:20:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:58,490 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-11-30 01:20:58,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:20:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-11-30 01:20:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:20:58,491 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:58,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:20:58,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 01:20:58,492 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]=== [2020-11-30 01:20:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:58,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2020-11-30 01:20:58,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:58,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967339037] [2020-11-30 01:20:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:58,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 01:20:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:58,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967339037] [2020-11-30 01:20:58,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127005206] [2020-11-30 01:20:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/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 [2020-11-30 01:20:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:20:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:20:58,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:20:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:20:58,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:20:58,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-11-30 01:20:58,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982902950] [2020-11-30 01:20:58,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:20:58,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:20:58,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:20:58,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:20:58,808 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 9 states. [2020-11-30 01:20:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:20:59,172 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-11-30 01:20:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:20:59,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-30 01:20:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:20:59,173 INFO L225 Difference]: With dead ends: 86 [2020-11-30 01:20:59,174 INFO L226 Difference]: Without dead ends: 86 [2020-11-30 01:20:59,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:20:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-30 01:20:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-11-30 01:20:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-30 01:20:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-11-30 01:20:59,179 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 17 [2020-11-30 01:20:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:20:59,179 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-11-30 01:20:59,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:20:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-11-30 01:20:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 01:20:59,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:20:59,181 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] [2020-11-30 01:20:59,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:20:59,404 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]=== [2020-11-30 01:20:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:20:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2020-11-30 01:20:59,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:20:59,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762418075] [2020-11-30 01:20:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:20:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:20:59,430 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:20:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:20:59,453 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:20:59,489 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:20:59,489 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:20:59,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 01:20:59,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:20:59 BoogieIcfgContainer [2020-11-30 01:20:59,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:20:59,523 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:20:59,523 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:20:59,524 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:20:59,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:20:52" (3/4) ... [2020-11-30 01:20:59,526 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:20:59,599 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_84432fc3-8c6e-463b-b040-82c37fc9d43a/bin/uautomizer/witness.graphml [2020-11-30 01:20:59,599 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:20:59,601 INFO L168 Benchmark]: Toolchain (without parser) took 8255.77 ms. Allocated memory was 86.0 MB in the beginning and 161.5 MB in the end (delta: 75.5 MB). Free memory was 52.6 MB in the beginning and 56.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 71.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:20:59,601 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 86.0 MB. Free memory was 56.8 MB in the beginning and 56.8 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:20:59,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 553.18 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 52.4 MB in the beginning and 72.1 MB in the end (delta: -19.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:20:59,608 INFO L168 Benchmark]: Boogie Preprocessor took 82.25 ms. Allocated memory is still 104.9 MB. Free memory was 72.1 MB in the beginning and 70.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:20:59,609 INFO L168 Benchmark]: RCFGBuilder took 925.57 ms. Allocated memory is still 104.9 MB. Free memory was 70.0 MB in the beginning and 75.8 MB in the end (delta: -5.8 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:20:59,609 INFO L168 Benchmark]: TraceAbstraction took 6610.75 ms. Allocated memory was 104.9 MB in the beginning and 161.5 MB in the end (delta: 56.6 MB). Free memory was 75.2 MB in the beginning and 58.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 75.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:20:59,610 INFO L168 Benchmark]: Witness Printer took 76.22 ms. Allocated memory is still 161.5 MB. Free memory was 58.6 MB in the beginning and 56.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:20:59,612 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 86.0 MB. Free memory was 56.8 MB in the beginning and 56.8 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 553.18 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 52.4 MB in the beginning and 72.1 MB in the end (delta: -19.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 82.25 ms. Allocated memory is still 104.9 MB. Free memory was 72.1 MB in the beginning and 70.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 925.57 ms. Allocated memory is still 104.9 MB. Free memory was 70.0 MB in the beginning and 75.8 MB in the end (delta: -5.8 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6610.75 ms. Allocated memory was 104.9 MB in the beginning and 161.5 MB in the end (delta: 56.6 MB). Free memory was 75.2 MB in the beginning and 58.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 75.2 MB. Max. memory is 16.1 GB. * Witness Printer took 76.22 ms. Allocated memory is still 161.5 MB. Free memory was 58.6 MB in the beginning and 56.5 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=1, i=0, length=1] [L526] COND TRUE i