./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/invert_string-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87b189dc1f4e4e7b15d899fcbb97cc91a55d1376 ............................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:15:00,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:15:00,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:15:00,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:15:00,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:15:00,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:15:00,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:15:00,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:15:00,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:15:00,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:15:00,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:15:00,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:15:00,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:15:00,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:15:00,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:15:00,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:15:00,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:15:00,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:15:00,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:15:00,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:15:00,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:15:00,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:15:00,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:15:00,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:15:00,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:15:00,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:15:00,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:15:00,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:15:00,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:15:00,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:15:00,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:15:00,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:15:00,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:15:00,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:15:00,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:15:00,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:15:00,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:15:00,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:15:00,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:15:00,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:15:00,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:15:00,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-30 00:15:00,656 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:15:00,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:15:00,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:15:00,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:15:00,658 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:15:00,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:15:00,659 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:15:00,659 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:15:00,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:15:00,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:15:00,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:15:00,660 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 00:15:00,660 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 00:15:00,660 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 00:15:00,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:15:00,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 00:15:00,661 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:15:00,661 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:15:00,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:15:00,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:15:00,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:15:00,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:15:00,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:15:00,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:15:00,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:15:00,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:15:00,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:15:00,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:15:00,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87b189dc1f4e4e7b15d899fcbb97cc91a55d1376 [2020-11-30 00:15:00,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:15:01,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:15:01,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:15:01,032 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:15:01,035 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:15:01,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/../../sv-benchmarks/c/loops/invert_string-2.c [2020-11-30 00:15:01,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/data/816485a53/094c7a7f2c5d4a8db347c0a60f45d23d/FLAG401cf49b8 [2020-11-30 00:15:01,607 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:15:01,607 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/sv-benchmarks/c/loops/invert_string-2.c [2020-11-30 00:15:01,614 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/data/816485a53/094c7a7f2c5d4a8db347c0a60f45d23d/FLAG401cf49b8 [2020-11-30 00:15:01,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/data/816485a53/094c7a7f2c5d4a8db347c0a60f45d23d [2020-11-30 00:15:01,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:15:01,971 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-30 00:15:01,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:15:01,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:15:01,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:15:01,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:15:01" (1/1) ... [2020-11-30 00:15:01,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1286aecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:01, skipping insertion in model container [2020-11-30 00:15:01,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:15:01" (1/1) ... [2020-11-30 00:15:01,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:15:02,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:15:02,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:15:02,236 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:15:02,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:15:02,268 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:15:02,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02 WrapperNode [2020-11-30 00:15:02,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:15:02,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:15:02,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:15:02,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:15:02,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (1/1) ... [2020-11-30 00:15:02,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (1/1) ... [2020-11-30 00:15:02,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (1/1) ... [2020-11-30 00:15:02,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (1/1) ... [2020-11-30 00:15:02,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (1/1) ... [2020-11-30 00:15:02,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (1/1) ... [2020-11-30 00:15:02,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (1/1) ... [2020-11-30 00:15:02,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:15:02,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:15:02,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:15:02,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:15:02,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:15:02,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-30 00:15:02,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:15:02,417 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-30 00:15:02,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-30 00:15:02,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-30 00:15:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-30 00:15:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-30 00:15:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-30 00:15:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:15:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-30 00:15:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-30 00:15:02,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-30 00:15:02,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-30 00:15:02,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 00:15:02,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 00:15:02,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 00:15:02,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-30 00:15:02,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:15:02,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:15:02,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:15:02,965 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-30 00:15:02,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:02 BoogieIcfgContainer [2020-11-30 00:15:02,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:15:02,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:15:02,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:15:02,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:15:02,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:15:01" (1/3) ... [2020-11-30 00:15:02,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331510da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:15:02, skipping insertion in model container [2020-11-30 00:15:02,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:02" (2/3) ... [2020-11-30 00:15:02,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331510da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:15:02, skipping insertion in model container [2020-11-30 00:15:02,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:02" (3/3) ... [2020-11-30 00:15:02,980 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2020-11-30 00:15:02,993 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:15:02,999 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 14 error locations. [2020-11-30 00:15:03,014 INFO L253 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2020-11-30 00:15:03,039 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:15:03,040 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 00:15:03,040 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:15:03,040 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:15:03,040 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:15:03,040 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:15:03,040 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:15:03,040 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:15:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-11-30 00:15:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:15:03,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:15:03,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:03,069 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:15:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:03,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1054295661, now seen corresponding path program 1 times [2020-11-30 00:15:03,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:03,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767085397] [2020-11-30 00:15:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:03,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:15:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:03,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767085397] [2020-11-30 00:15:03,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:03,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:03,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882722342] [2020-11-30 00:15:03,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:15:03,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:03,561 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-11-30 00:15:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:03,744 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-11-30 00:15:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:03,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-30 00:15:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:15:03,756 INFO L225 Difference]: With dead ends: 49 [2020-11-30 00:15:03,756 INFO L226 Difference]: Without dead ends: 46 [2020-11-30 00:15:03,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-30 00:15:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-11-30 00:15:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-30 00:15:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-11-30 00:15:03,816 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 8 [2020-11-30 00:15:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:15:03,816 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-11-30 00:15:03,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:15:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-11-30 00:15:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:15:03,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:15:03,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:03,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:15:03,818 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:15:03,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:03,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1054295351, now seen corresponding path program 1 times [2020-11-30 00:15:03,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:03,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670001133] [2020-11-30 00:15:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:03,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:15:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:03,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670001133] [2020-11-30 00:15:03,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:03,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728704434] [2020-11-30 00:15:03,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:15:03,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:15:03,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:15:03,978 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-11-30 00:15:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:04,188 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-30 00:15:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:15:04,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 00:15:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:15:04,190 INFO L225 Difference]: With dead ends: 42 [2020-11-30 00:15:04,190 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 00:15:04,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:15:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 00:15:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-30 00:15:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 00:15:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-11-30 00:15:04,203 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 8 [2020-11-30 00:15:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:15:04,204 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-11-30 00:15:04,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:15:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-11-30 00:15:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:15:04,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:15:04,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:04,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:15:04,207 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:15:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1054295352, now seen corresponding path program 1 times [2020-11-30 00:15:04,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:04,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278522435] [2020-11-30 00:15:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:04,275 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:04,320 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:04,355 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:04,356 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:15:04,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:15:04,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:15:04 BoogieIcfgContainer [2020-11-30 00:15:04,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:15:04,384 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:15:04,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:15:04,384 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:15:04,385 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:02" (3/4) ... [2020-11-30 00:15:04,387 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:15:04,420 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6270e7af-f7ff-461f-8adb-72d989039ff6/bin/uautomizer/witness.graphml [2020-11-30 00:15:04,423 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:15:04,425 INFO L168 Benchmark]: Toolchain (without parser) took 2453.80 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 53.2 MB in the beginning and 69.1 MB in the end (delta: -16.0 MB). Peak memory consumption was 1.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:04,426 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory was 58.6 MB in the beginning and 58.5 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:15:04,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.40 ms. Allocated memory is still 86.0 MB. Free memory was 53.0 MB in the beginning and 63.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:04,427 INFO L168 Benchmark]: Boogie Preprocessor took 42.18 ms. Allocated memory is still 86.0 MB. Free memory was 63.5 MB in the beginning and 62.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:04,428 INFO L168 Benchmark]: RCFGBuilder took 654.50 ms. Allocated memory is still 86.0 MB. Free memory was 62.1 MB in the beginning and 43.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:04,429 INFO L168 Benchmark]: TraceAbstraction took 1412.98 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 42.9 MB in the beginning and 71.1 MB in the end (delta: -28.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:15:04,429 INFO L168 Benchmark]: Witness Printer took 39.82 ms. Allocated memory is still 104.9 MB. Free memory was 71.1 MB in the beginning and 69.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:04,433 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory was 58.6 MB in the beginning and 58.5 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.40 ms. Allocated memory is still 86.0 MB. Free memory was 53.0 MB in the beginning and 63.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.18 ms. Allocated memory is still 86.0 MB. Free memory was 63.5 MB in the beginning and 62.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 654.50 ms. Allocated memory is still 86.0 MB. Free memory was 62.1 MB in the beginning and 43.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1412.98 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 42.9 MB in the beginning and 71.1 MB in the end (delta: -28.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 39.82 ms. Allocated memory is still 104.9 MB. Free memory was 71.1 MB in the beginning and 69.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 23]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L15] int MAX = __VERIFIER_nondet_uint(); [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 VAL [cont=0, i=0, MAX=-1, str1={7:0}, str2={3:0}] [L20] COND FALSE !(i