./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/invert_string_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/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 01c8dcbf548ac0eef8cebe655947adbb13d26f9a ............................................................................................................................................................................................................................................................................................................... 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 0.1.23-635dfa2 [2018-12-08 15:58:24,175 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 15:58:24,176 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 15:58:24,182 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 15:58:24,182 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 15:58:24,183 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 15:58:24,183 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 15:58:24,184 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 15:58:24,185 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 15:58:24,185 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 15:58:24,186 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 15:58:24,186 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 15:58:24,186 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 15:58:24,187 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 15:58:24,187 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 15:58:24,188 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 15:58:24,188 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 15:58:24,189 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 15:58:24,190 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 15:58:24,190 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 15:58:24,191 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 15:58:24,191 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 15:58:24,192 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 15:58:24,192 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 15:58:24,193 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 15:58:24,193 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 15:58:24,193 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 15:58:24,194 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 15:58:24,194 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 15:58:24,195 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 15:58:24,195 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 15:58:24,195 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 15:58:24,195 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 15:58:24,195 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 15:58:24,196 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 15:58:24,196 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 15:58:24,196 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-12-08 15:58:24,203 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 15:58:24,203 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 15:58:24,203 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 15:58:24,204 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 15:58:24,204 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 15:58:24,204 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 15:58:24,204 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 15:58:24,204 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 15:58:24,204 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 15:58:24,204 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 15:58:24,205 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 15:58:24,205 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 15:58:24,206 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 15:58:24,206 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 15:58:24,206 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:58:24,206 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 15:58:24,206 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 15:58:24,206 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 15:58:24,206 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 15:58:24,206 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_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/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 -> 01c8dcbf548ac0eef8cebe655947adbb13d26f9a [2018-12-08 15:58:24,224 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 15:58:24,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 15:58:24,234 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 15:58:24,236 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 15:58:24,236 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 15:58:24,236 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/../../sv-benchmarks/c/loops/invert_string_false-valid-deref.c [2018-12-08 15:58:24,272 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/data/4199c744c/db549c18b1a94b91bd09bb9c8eeb1b09/FLAG8aca155b7 [2018-12-08 15:58:24,701 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 15:58:24,701 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/sv-benchmarks/c/loops/invert_string_false-valid-deref.c [2018-12-08 15:58:24,704 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/data/4199c744c/db549c18b1a94b91bd09bb9c8eeb1b09/FLAG8aca155b7 [2018-12-08 15:58:24,712 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/data/4199c744c/db549c18b1a94b91bd09bb9c8eeb1b09 [2018-12-08 15:58:24,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 15:58:24,715 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-12-08 15:58:24,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 15:58:24,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 15:58:24,718 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 15:58:24,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@537737cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24, skipping insertion in model container [2018-12-08 15:58:24,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 15:58:24,732 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 15:58:24,818 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:58:24,820 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 15:58:24,832 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:58:24,843 INFO L195 MainTranslator]: Completed translation [2018-12-08 15:58:24,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24 WrapperNode [2018-12-08 15:58:24,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 15:58:24,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 15:58:24,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 15:58:24,844 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 15:58:24,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (1/1) ... [2018-12-08 15:58:24,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 15:58:24,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 15:58:24,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 15:58:24,894 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 15:58:24,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/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 [2018-12-08 15:58:24,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 15:58:24,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 15:58:24,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 15:58:24,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 15:58:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-12-08 15:58:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 15:58:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-12-08 15:58:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-12-08 15:58:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 15:58:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 15:58:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 15:58:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-08 15:58:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 15:58:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 15:58:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 15:58:25,070 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 15:58:25,070 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-08 15:58:25,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:58:25 BoogieIcfgContainer [2018-12-08 15:58:25,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 15:58:25,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 15:58:25,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 15:58:25,073 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 15:58:25,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 03:58:24" (1/3) ... [2018-12-08 15:58:25,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b409c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:58:25, skipping insertion in model container [2018-12-08 15:58:25,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:58:24" (2/3) ... [2018-12-08 15:58:25,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b409c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:58:25, skipping insertion in model container [2018-12-08 15:58:25,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:58:25" (3/3) ... [2018-12-08 15:58:25,075 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_false-valid-deref.c [2018-12-08 15:58:25,081 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 15:58:25,085 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2018-12-08 15:58:25,095 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2018-12-08 15:58:25,111 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 15:58:25,111 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 15:58:25,111 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-08 15:58:25,111 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 15:58:25,111 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 15:58:25,111 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 15:58:25,111 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 15:58:25,112 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 15:58:25,112 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 15:58:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-12-08 15:58:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 15:58:25,127 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:58:25,127 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:58:25,128 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION]=== [2018-12-08 15:58:25,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:58:25,133 INFO L82 PathProgramCache]: Analyzing trace with hash -523138443, now seen corresponding path program 1 times [2018-12-08 15:58:25,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:58:25,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:58:25,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:58:25,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:58:25,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:58:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:58:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:58:25,212 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:58:25,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 15:58:25,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 15:58:25,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 15:58:25,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 15:58:25,223 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-12-08 15:58:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:58:25,234 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-12-08 15:58:25,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 15:58:25,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-12-08 15:58:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:58:25,241 INFO L225 Difference]: With dead ends: 47 [2018-12-08 15:58:25,241 INFO L226 Difference]: Without dead ends: 43 [2018-12-08 15:58:25,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 15:58:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-08 15:58:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-08 15:58:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-08 15:58:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-12-08 15:58:25,267 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 8 [2018-12-08 15:58:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:58:25,268 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-12-08 15:58:25,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 15:58:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-12-08 15:58:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 15:58:25,268 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:58:25,268 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:58:25,268 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION]=== [2018-12-08 15:58:25,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:58:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash -523138753, now seen corresponding path program 1 times [2018-12-08 15:58:25,269 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:58:25,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:58:25,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:58:25,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:58:25,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:58:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:58:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:58:25,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:58:25,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 15:58:25,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 15:58:25,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 15:58:25,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:58:25,313 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 3 states. [2018-12-08 15:58:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:58:25,347 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-12-08 15:58:25,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 15:58:25,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-08 15:58:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:58:25,348 INFO L225 Difference]: With dead ends: 39 [2018-12-08 15:58:25,348 INFO L226 Difference]: Without dead ends: 39 [2018-12-08 15:58:25,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:58:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-08 15:58:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-08 15:58:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-08 15:58:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-12-08 15:58:25,352 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2018-12-08 15:58:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:58:25,353 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-12-08 15:58:25,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 15:58:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-12-08 15:58:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 15:58:25,353 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:58:25,353 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:58:25,353 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION]=== [2018-12-08 15:58:25,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:58:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash -523138752, now seen corresponding path program 1 times [2018-12-08 15:58:25,353 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:58:25,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:58:25,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:58:25,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:58:25,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:58:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 15:58:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 15:58:25,390 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 15:58:25,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 03:58:25 BoogieIcfgContainer [2018-12-08 15:58:25,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 15:58:25,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 15:58:25,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 15:58:25,402 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 15:58:25,402 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:58:25" (3/4) ... [2018-12-08 15:58:25,404 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 15:58:25,433 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_ac72c5ee-a9b7-4531-bf91-adccf9ed3870/bin-2019/uautomizer/witness.graphml [2018-12-08 15:58:25,433 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 15:58:25,434 INFO L168 Benchmark]: Toolchain (without parser) took 719.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 954.4 MB in the beginning and 1.1 GB in the end (delta: -108.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2018-12-08 15:58:25,435 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:58:25,435 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.04 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-08 15:58:25,435 INFO L168 Benchmark]: Boogie Preprocessor took 49.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -189.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-12-08 15:58:25,436 INFO L168 Benchmark]: RCFGBuilder took 176.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2018-12-08 15:58:25,436 INFO L168 Benchmark]: TraceAbstraction took 330.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 40.3 MB). Peak memory consumption was 40.3 MB. Max. memory is 11.5 GB. [2018-12-08 15:58:25,437 INFO L168 Benchmark]: Witness Printer took 31.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:58:25,438 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 128.04 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 49.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -189.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 176.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 330.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 40.3 MB). Peak memory consumption was 40.3 MB. Max. memory is 11.5 GB. * Witness Printer took 31.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L13] int MAX = __VERIFIER_nondet_uint(); [L14] char str1[MAX], str2[MAX]; [L15] int cont, i, j; [L16] cont = 0 [L18] i=0 VAL [cont=0, i=0, MAX=-2147483646, str1={2147483652:0}, str2={2147483653:0}] [L18] COND FALSE !(i