./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/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 d452f938d74713dbff7e0330f8ef393409d67ffe ........................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:02:44,212 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:02:44,213 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:02:44,220 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:02:44,220 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:02:44,221 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:02:44,221 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:02:44,222 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:02:44,224 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:02:44,224 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:02:44,225 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:02:44,225 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:02:44,226 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:02:44,226 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:02:44,227 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:02:44,228 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:02:44,228 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:02:44,229 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:02:44,231 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:02:44,232 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:02:44,233 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:02:44,233 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:02:44,235 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:02:44,235 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:02:44,235 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:02:44,236 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:02:44,237 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:02:44,237 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:02:44,238 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:02:44,238 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:02:44,239 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:02:44,239 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:02:44,239 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:02:44,239 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:02:44,240 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:02:44,241 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:02:44,241 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-28 13:02:44,251 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:02:44,251 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:02:44,251 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:02:44,251 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:02:44,252 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:02:44,252 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:02:44,252 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:02:44,252 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:02:44,253 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:02:44,253 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 13:02:44,253 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:02:44,253 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:02:44,253 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:02:44,253 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-28 13:02:44,253 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-28 13:02:44,253 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-28 13:02:44,254 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:02:44,254 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:02:44,254 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:02:44,254 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:02:44,254 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:02:44,254 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:02:44,254 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:02:44,255 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:02:44,255 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:02:44,255 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:02:44,255 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:02:44,255 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:02:44,255 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/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 -> d452f938d74713dbff7e0330f8ef393409d67ffe [2018-11-28 13:02:44,277 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:02:44,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:02:44,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:02:44,287 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:02:44,287 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:02:44,288 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1_false-valid-deref.c [2018-11-28 13:02:44,325 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/data/e6d0d2d53/c26e22ee4ccc481b9e872c50d9f31cbe/FLAG5f8ae18f7 [2018-11-28 13:02:44,730 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:02:44,730 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/sv-benchmarks/c/memsafety-ext3/derefAfterFree1_false-valid-deref.c [2018-11-28 13:02:44,735 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/data/e6d0d2d53/c26e22ee4ccc481b9e872c50d9f31cbe/FLAG5f8ae18f7 [2018-11-28 13:02:44,747 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/data/e6d0d2d53/c26e22ee4ccc481b9e872c50d9f31cbe [2018-11-28 13:02:44,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:02:44,750 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-28 13:02:44,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:02:44,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:02:44,754 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:02:44,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df92850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44, skipping insertion in model container [2018-11-28 13:02:44,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:02:44,774 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:02:44,876 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:02:44,883 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:02:44,891 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:02:44,900 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:02:44,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44 WrapperNode [2018-11-28 13:02:44,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:02:44,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:02:44,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:02:44,901 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:02:44,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (1/1) ... [2018-11-28 13:02:44,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:02:44,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:02:44,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:02:44,921 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:02:44,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/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 [2018-11-28 13:02:44,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:02:44,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:02:44,991 INFO L138 BoogieDeclarations]: Found implementation of procedure freePointer [2018-11-28 13:02:44,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:02:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-11-28 13:02:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2018-11-28 13:02:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure freePointer [2018-11-28 13:02:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 13:02:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:02:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 13:02:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 13:02:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:02:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:02:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 13:02:45,088 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:02:45,089 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 13:02:45,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:02:45 BoogieIcfgContainer [2018-11-28 13:02:45,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:02:45,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:02:45,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:02:45,092 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:02:45,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:02:44" (1/3) ... [2018-11-28 13:02:45,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26abbe79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:02:45, skipping insertion in model container [2018-11-28 13:02:45,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:02:44" (2/3) ... [2018-11-28 13:02:45,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26abbe79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:02:45, skipping insertion in model container [2018-11-28 13:02:45,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:02:45" (3/3) ... [2018-11-28 13:02:45,094 INFO L112 eAbstractionObserver]: Analyzing ICFG derefAfterFree1_false-valid-deref.c [2018-11-28 13:02:45,100 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:02:45,104 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-11-28 13:02:45,113 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-11-28 13:02:45,127 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:02:45,127 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:02:45,127 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-28 13:02:45,127 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:02:45,128 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:02:45,128 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:02:45,128 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:02:45,128 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:02:45,128 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:02:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-28 13:02:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 13:02:45,144 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:02:45,144 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:02:45,146 INFO L423 AbstractCegarLoop]: === Iteration 1 === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-28 13:02:45,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:02:45,152 INFO L82 PathProgramCache]: Analyzing trace with hash -96564575, now seen corresponding path program 1 times [2018-11-28 13:02:45,153 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:02:45,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:02:45,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:02:45,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:02:45,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:02:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:02:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:02:45,270 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:02:45,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:02:45,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:02:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:02:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:02:45,287 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-28 13:02:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:02:45,330 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2018-11-28 13:02:45,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:02:45,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-11-28 13:02:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:02:45,336 INFO L225 Difference]: With dead ends: 22 [2018-11-28 13:02:45,336 INFO L226 Difference]: Without dead ends: 19 [2018-11-28 13:02:45,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:02:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-28 13:02:45,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-28 13:02:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-28 13:02:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2018-11-28 13:02:45,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 9 [2018-11-28 13:02:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:02:45,359 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2018-11-28 13:02:45,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:02:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2018-11-28 13:02:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 13:02:45,359 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:02:45,359 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:02:45,360 INFO L423 AbstractCegarLoop]: === Iteration 2 === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-28 13:02:45,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:02:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1301465505, now seen corresponding path program 1 times [2018-11-28 13:02:45,360 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:02:45,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:02:45,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:02:45,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:02:45,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:02:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:02:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:02:45,420 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:02:45,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:02:45,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:02:45,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:02:45,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:02:45,421 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand 5 states. [2018-11-28 13:02:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:02:45,482 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2018-11-28 13:02:45,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:02:45,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-28 13:02:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:02:45,483 INFO L225 Difference]: With dead ends: 18 [2018-11-28 13:02:45,483 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 13:02:45,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:02:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 13:02:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 13:02:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 13:02:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2018-11-28 13:02:45,486 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 10 [2018-11-28 13:02:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:02:45,486 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2018-11-28 13:02:45,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:02:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2018-11-28 13:02:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 13:02:45,487 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:02:45,487 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:02:45,487 INFO L423 AbstractCegarLoop]: === Iteration 3 === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-28 13:02:45,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:02:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1289113817, now seen corresponding path program 1 times [2018-11-28 13:02:45,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:02:45,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:02:45,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:02:45,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:02:45,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:02:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:02:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:02:45,520 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 13:02:45,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:02:45 BoogieIcfgContainer [2018-11-28 13:02:45,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:02:45,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:02:45,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:02:45,535 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:02:45,536 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:02:45" (3/4) ... [2018-11-28 13:02:45,537 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 13:02:45,562 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6e0af432-0ae4-4b4c-9fa1-256e1321c07c/bin-2019/uautomizer/witness.graphml [2018-11-28 13:02:45,562 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:02:45,563 INFO L168 Benchmark]: Toolchain (without parser) took 813.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 958.7 MB in the beginning and 1.1 GB in the end (delta: -95.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2018-11-28 13:02:45,564 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:02:45,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.09 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 947.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-28 13:02:45,565 INFO L168 Benchmark]: Boogie Preprocessor took 19.94 ms. Allocated memory is still 1.0 GB. Free memory is still 947.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:02:45,565 INFO L168 Benchmark]: RCFGBuilder took 168.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 947.8 MB in the beginning and 1.1 GB in the end (delta: -154.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:02:45,566 INFO L168 Benchmark]: TraceAbstraction took 445.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 11.5 GB. [2018-11-28 13:02:45,566 INFO L168 Benchmark]: Witness Printer took 26.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:02:45,568 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.09 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 947.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.94 ms. Allocated memory is still 1.0 GB. Free memory is still 947.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 168.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 947.8 MB in the beginning and 1.1 GB in the end (delta: -154.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 445.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 11.5 GB. * Witness Printer took 26.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); VAL [malloc(10 * sizeof(int))={42:0}, p={42:0}] [L12] CALL freePointer(p) VAL [p={42:0}] [L6] free(p) VAL [p={42:0}, p={42:0}] [L6] free(p) [L12] RET freePointer(p) VAL [malloc(10 * sizeof(int))={42:0}, p={42:0}] [L14] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 5 error locations. UNSAFE Result, 0.4s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 SDtfs, 19 SDslu, 58 SDs, 0 SdLazy, 36 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 337 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...