./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c -s /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25bb35238109f4fc42bc09877cec45401fedd3ae ....................................................................................................................................................................................................................................... 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 --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:40:32,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:40:32,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:40:32,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:40:32,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:40:32,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:40:32,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:40:32,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:40:32,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:40:32,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:40:32,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:40:32,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:40:32,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:40:32,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:40:32,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:40:32,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:40:32,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:40:32,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:40:32,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:40:32,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:40:32,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:40:32,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:40:32,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:40:32,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:40:32,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:40:32,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:40:32,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:40:32,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:40:32,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:40:32,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:40:32,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:40:32,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:40:32,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:40:32,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:40:32,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:40:32,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:40:32,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:40:32,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:40:32,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:40:32,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:40:32,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:40:32,624 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:40:32,649 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:40:32,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:40:32,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:40:32,650 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:40:32,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:40:32,651 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:40:32,651 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:40:32,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:40:32,651 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:40:32,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:40:32,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:40:32,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:40:32,652 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:40:32,653 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:40:32,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:40:32,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:40:32,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:40:32,653 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:40:32,654 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:40:32,654 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:40:32,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:40:32,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:40:32,654 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:40:32,654 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:40:32,655 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:40:32,655 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:40:32,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:40:32,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:40:32,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:40:32,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:40:32,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:40:32,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:40:32,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:40:32,656 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:40:32,657 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:40:32,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:40:32,657 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan 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 -> Taipan 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 -> 25bb35238109f4fc42bc09877cec45401fedd3ae [2019-11-26 02:40:32,815 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:40:32,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:40:32,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:40:32,830 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:40:32,830 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:40:32,831 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2019-11-26 02:40:32,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/data/a0787e502/2b57e72bcef24d6a81a974f187380f89/FLAGa307b02d1 [2019-11-26 02:40:33,285 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:40:33,285 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2019-11-26 02:40:33,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/data/a0787e502/2b57e72bcef24d6a81a974f187380f89/FLAGa307b02d1 [2019-11-26 02:40:33,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/data/a0787e502/2b57e72bcef24d6a81a974f187380f89 [2019-11-26 02:40:33,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:40:33,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:40:33,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:40:33,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:40:33,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:40:33,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:33,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54728782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33, skipping insertion in model container [2019-11-26 02:40:33,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:33,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:40:33,706 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:40:33,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:40:33,866 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:40:33,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:40:33,969 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:40:33,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33 WrapperNode [2019-11-26 02:40:33,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:40:33,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:40:33,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:40:33,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:40:33,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:33,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:34,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:40:34,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:40:34,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:40:34,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:40:34,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:34,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:34,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:34,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:34,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:34,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:34,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... [2019-11-26 02:40:34,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:40:34,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:40:34,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:40:34,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:40:34,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/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 [2019-11-26 02:40:34,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-26 02:40:34,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:40:34,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:40:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-26 02:40:34,453 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:40:34,453 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-26 02:40:34,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:40:34 BoogieIcfgContainer [2019-11-26 02:40:34,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:40:34,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:40:34,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:40:34,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:40:34,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:40:33" (1/3) ... [2019-11-26 02:40:34,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701e708a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:40:34, skipping insertion in model container [2019-11-26 02:40:34,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:33" (2/3) ... [2019-11-26 02:40:34,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701e708a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:40:34, skipping insertion in model container [2019-11-26 02:40:34,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:40:34" (3/3) ... [2019-11-26 02:40:34,467 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe.c [2019-11-26 02:40:34,476 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:40:34,481 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2019-11-26 02:40:34,490 INFO L249 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2019-11-26 02:40:34,504 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:40:34,505 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:40:34,505 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:40:34,505 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:40:34,505 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:40:34,505 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:40:34,505 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:40:34,506 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:40:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-26 02:40:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-26 02:40:34,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:40:34,526 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-26 02:40:34,526 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:40:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:40:34,532 INFO L82 PathProgramCache]: Analyzing trace with hash 29861, now seen corresponding path program 1 times [2019-11-26 02:40:34,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:40:34,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [454753058] [2019-11-26 02:40:34,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:40:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:40:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:40:34,670 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:40:34,671 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:40:34,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:40:34,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:40:34 BoogieIcfgContainer [2019-11-26 02:40:34,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:40:34,892 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:40:34,892 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:40:34,893 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:40:34,893 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:40:34" (3/4) ... [2019-11-26 02:40:34,895 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:40:34,926 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_217e243c-ce76-4f70-a42d-a098398258cb/bin/utaipan/witness.graphml [2019-11-26 02:40:34,926 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:40:34,928 INFO L168 Benchmark]: Toolchain (without parser) took 1252.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -120.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:34,928 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:40:34,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:34,929 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:40:34,930 INFO L168 Benchmark]: Boogie Preprocessor took 34.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:40:34,930 INFO L168 Benchmark]: RCFGBuilder took 413.59 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:34,931 INFO L168 Benchmark]: TraceAbstraction took 436.55 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:34,931 INFO L168 Benchmark]: Witness Printer took 33.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:40:34,934 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 293.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 34.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 413.59 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 436.55 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * Witness Printer took 33.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L24] char *s1; [L25] char *s2; [L26] int n = __VERIFIER_nondet_int(); [L5] char *s = s1; [L7] \read(*s) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 11 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...