./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be --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 a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 .................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.1-dev-e943c26 [2021-10-21 20:18:34,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:18:34,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:18:34,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:18:34,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:18:34,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:18:34,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:18:34,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:18:34,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:18:34,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:18:34,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:18:34,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:18:34,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:18:34,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:18:34,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:18:34,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:18:34,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:18:34,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:18:34,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:18:34,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:18:34,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:18:34,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:18:34,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:18:34,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:18:34,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:18:34,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:18:34,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:18:34,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:18:34,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:18:34,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:18:34,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:18:34,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:18:34,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:18:34,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:18:34,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:18:34,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:18:34,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:18:34,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:18:34,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:18:34,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:18:34,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:18:34,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:18:34,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:18:34,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:18:34,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:18:34,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:18:34,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:18:34,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:18:34,999 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:18:35,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:18:35,000 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:18:35,001 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:18:35,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:18:35,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:18:35,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:18:35,003 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:18:35,003 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:18:35,004 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:18:35,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:18:35,004 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:18:35,005 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:18:35,005 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:18:35,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:18:35,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:18:35,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:18:35,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:18:35,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:18:35,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:18:35,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:18:35,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:18:35,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:18:35,010 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_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 [2021-10-21 20:18:35,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:18:35,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:18:35,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:18:35,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:18:35,463 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:18:35,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-10-21 20:18:35,570 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/data/a65170cd2/afa619bdc8534a528b214d9bcc445f3b/FLAG7fcf3436b [2021-10-21 20:18:36,120 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:18:36,122 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-10-21 20:18:36,137 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/data/a65170cd2/afa619bdc8534a528b214d9bcc445f3b/FLAG7fcf3436b [2021-10-21 20:18:36,480 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/data/a65170cd2/afa619bdc8534a528b214d9bcc445f3b [2021-10-21 20:18:36,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:18:36,490 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:18:36,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:18:36,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:18:36,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:18:36,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf687e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36, skipping insertion in model container [2021-10-21 20:18:36,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:18:36,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:18:36,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:18:36,709 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:18:36,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:18:36,752 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:18:36,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36 WrapperNode [2021-10-21 20:18:36,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:18:36,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:18:36,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:18:36,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:18:36,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:18:36,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:18:36,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:18:36,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:18:36,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (1/1) ... [2021-10-21 20:18:36,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:18:36,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:18:36,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:18:36,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:18:36,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:18:36,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:18:36,926 INFO L138 BoogieDeclarations]: Found implementation of procedure freePointer [2021-10-21 20:18:36,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:18:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 20:18:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 20:18:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure freePointer [2021-10-21 20:18:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:18:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:18:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 20:18:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:18:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:18:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:18:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:18:37,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:18:37,158 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-10-21 20:18:37,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:18:37 BoogieIcfgContainer [2021-10-21 20:18:37,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:18:37,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:18:37,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:18:37,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:18:37,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:18:36" (1/3) ... [2021-10-21 20:18:37,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486684de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:18:37, skipping insertion in model container [2021-10-21 20:18:37,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:36" (2/3) ... [2021-10-21 20:18:37,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486684de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:18:37, skipping insertion in model container [2021-10-21 20:18:37,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:18:37" (3/3) ... [2021-10-21 20:18:37,186 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2021-10-21 20:18:37,192 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:18:37,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-21 20:18:37,248 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:18:37,257 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:18:37,274 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-21 20:18:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:18:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:18:37,301 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:37,301 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:37,302 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting freePointerErr0ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-21 20:18:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1608321379, now seen corresponding path program 1 times [2021-10-21 20:18:37,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:37,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415128730] [2021-10-21 20:18:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:37,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:18:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:37,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:37,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415128730] [2021-10-21 20:18:37,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415128730] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:37,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:37,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:18:37,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682226015] [2021-10-21 20:18:37,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:37,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:18:37,727 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:18:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:37,950 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2021-10-21 20:18:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:18:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-21 20:18:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:37,966 INFO L225 Difference]: With dead ends: 24 [2021-10-21 20:18:37,966 INFO L226 Difference]: Without dead ends: 21 [2021-10-21 20:18:37,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:18:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-21 20:18:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-21 20:18:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:18:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2021-10-21 20:18:38,014 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 9 [2021-10-21 20:18:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:38,016 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2021-10-21 20:18:38,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:18:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2021-10-21 20:18:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:18:38,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:38,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:38,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:18:38,019 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting freePointerErr1ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-21 20:18:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1681644769, now seen corresponding path program 1 times [2021-10-21 20:18:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:38,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80106209] [2021-10-21 20:18:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:38,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:38,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:18:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:38,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:38,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80106209] [2021-10-21 20:18:38,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80106209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:38,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:38,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:18:38,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582361135] [2021-10-21 20:18:38,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:38,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:38,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:38,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:18:38,197 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:18:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:38,295 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2021-10-21 20:18:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:18:38,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 20:18:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:38,297 INFO L225 Difference]: With dead ends: 20 [2021-10-21 20:18:38,297 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 20:18:38,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:18:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 20:18:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-21 20:18:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 14 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:18:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2021-10-21 20:18:38,312 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 10 [2021-10-21 20:18:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:38,313 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2021-10-21 20:18:38,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:18:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2021-10-21 20:18:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:18:38,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:38,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:38,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:18:38,317 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting freePointerErr2ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-21 20:18:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash -591380251, now seen corresponding path program 1 times [2021-10-21 20:18:38,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:38,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585548073] [2021-10-21 20:18:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:38,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:38,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:18:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:38,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:38,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585548073] [2021-10-21 20:18:38,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585548073] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:38,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:38,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:18:38,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027779015] [2021-10-21 20:18:38,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:38,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:18:38,467 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:18:38,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:38,563 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2021-10-21 20:18:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:18:38,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:18:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:38,567 INFO L225 Difference]: With dead ends: 19 [2021-10-21 20:18:38,567 INFO L226 Difference]: Without dead ends: 19 [2021-10-21 20:18:38,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:18:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-21 20:18:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-21 20:18:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 13 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:18:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2021-10-21 20:18:38,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 11 [2021-10-21 20:18:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:38,578 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2021-10-21 20:18:38,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:18:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2021-10-21 20:18:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:18:38,580 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:38,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:38,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:18:38,581 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-21 20:18:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash 146827991, now seen corresponding path program 1 times [2021-10-21 20:18:38,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:38,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535394195] [2021-10-21 20:18:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:38,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:18:38,618 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:18:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:18:38,653 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:18:38,654 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:18:38,655 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:18:38,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr0ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:18:38,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr1ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:18:38,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:18:38,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:18:38,659 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:18:38,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:18:38,667 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:18:38,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:18:38 BoogieIcfgContainer [2021-10-21 20:18:38,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:18:38,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:18:38,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:18:38,689 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:18:38,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:18:37" (3/4) ... [2021-10-21 20:18:38,691 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:18:38,731 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:18:38,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:18:38,733 INFO L168 Benchmark]: Toolchain (without parser) took 2241.91 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 60.2 MB in the beginning and 65.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:38,734 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 100.7 MB. Free memory is still 76.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:18:38,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.14 ms. Allocated memory is still 100.7 MB. Free memory was 60.0 MB in the beginning and 77.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:38,735 INFO L168 Benchmark]: Boogie Preprocessor took 57.27 ms. Allocated memory is still 100.7 MB. Free memory was 77.9 MB in the beginning and 76.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:18:38,736 INFO L168 Benchmark]: RCFGBuilder took 348.33 ms. Allocated memory is still 100.7 MB. Free memory was 76.4 MB in the beginning and 67.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:38,737 INFO L168 Benchmark]: TraceAbstraction took 1522.46 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 66.9 MB in the beginning and 66.6 MB in the end (delta: 361.8 kB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:38,737 INFO L168 Benchmark]: Witness Printer took 42.54 ms. Allocated memory is still 121.6 MB. Free memory was 66.6 MB in the beginning and 65.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:38,740 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 100.7 MB. Free memory is still 76.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.14 ms. Allocated memory is still 100.7 MB. Free memory was 60.0 MB in the beginning and 77.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.27 ms. Allocated memory is still 100.7 MB. Free memory was 77.9 MB in the beginning and 76.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 348.33 ms. Allocated memory is still 100.7 MB. Free memory was 76.4 MB in the beginning and 67.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1522.46 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 66.9 MB in the beginning and 66.6 MB in the end (delta: 361.8 kB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. * Witness Printer took 42.54 ms. Allocated memory is still 121.6 MB. Free memory was 66.6 MB in the beginning and 65.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); [L12] CALL freePointer(p) VAL [p={-1:0}] [L6] free(p) VAL [p={-1:0}, p={-1:0}] [L6] free(p) VAL [p={-1:0}, p={-1:0}] [L6] free(p) [L12] RET freePointer(p) VAL [p={-1:0}] [L14] p[0] = 1 - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 9]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 1418.1ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 18.5ms, AutomataDifference: 472.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35 SDtfs, 47 SDslu, 75 SDs, 0 SdLazy, 114 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 157.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 298.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.0ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.6ms SsaConstructionTime, 116.3ms SatisfiabilityAnalysisTime, 452.8ms InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 96 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 20:18:38,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873700ad-66a3-4f89-98cb-a6a2f82b68a1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...