./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/scopes4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext3/scopes4-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 25981771a012eec333f97d8302486eae22970d9e ............................................................................................................................................................................................................................................................................................................................... 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 0.1.25-906a4fb [2020-10-19 18:24:17,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:24:17,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:24:17,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:24:17,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:24:17,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:24:17,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:24:17,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:24:17,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:24:17,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:24:17,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:24:17,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:24:17,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:24:17,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:24:17,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:24:17,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:24:17,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:24:17,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:24:17,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:24:17,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:24:17,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:24:17,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:24:17,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:24:17,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:24:17,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:24:17,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:24:17,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:24:17,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:24:17,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:24:17,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:24:17,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:24:17,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:24:17,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:24:17,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:24:17,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:24:17,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:24:17,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:24:17,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:24:17,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:24:17,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:24:17,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:24:17,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:24:18,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:24:18,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:24:18,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:24:18,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:24:18,019 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:24:18,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:24:18,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:24:18,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:24:18,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:24:18,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:24:18,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:24:18,021 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:24:18,021 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:24:18,021 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:24:18,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:24:18,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:24:18,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:24:18,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:24:18,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:24:18,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:24:18,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:24:18,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:24:18,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:24:18,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:24:18,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:24:18,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:24:18,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:24:18,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:24:18,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> 25981771a012eec333f97d8302486eae22970d9e [2020-10-19 18:24:18,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:24:18,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:24:18,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:24:18,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:24:18,360 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:24:18,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes4-2.c [2020-10-19 18:24:18,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10cacc2de/dd870024face47529d0ca4d9609e0a12/FLAG74d3043a9 [2020-10-19 18:24:18,819 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:24:18,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes4-2.c [2020-10-19 18:24:18,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10cacc2de/dd870024face47529d0ca4d9609e0a12/FLAG74d3043a9 [2020-10-19 18:24:19,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10cacc2de/dd870024face47529d0ca4d9609e0a12 [2020-10-19 18:24:19,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:24:19,220 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:24:19,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:24:19,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:24:19,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:24:19,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ab9f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19, skipping insertion in model container [2020-10-19 18:24:19,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:24:19,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:24:19,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:24:19,479 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:24:19,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:24:19,522 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:24:19,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19 WrapperNode [2020-10-19 18:24:19,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:24:19,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:24:19,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:24:19,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:24:19,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (1/1) ... [2020-10-19 18:24:19,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:24:19,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:24:19,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:24:19,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:24:19,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 18:24:19,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:24:19,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:24:19,763 INFO L138 BoogieDeclarations]: Found implementation of procedure foo2 [2020-10-19 18:24:19,763 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-19 18:24:19,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:24:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-10-19 18:24:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure foo2 [2020-10-19 18:24:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:24:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:24:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:24:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-19 18:24:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:24:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:24:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:24:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:24:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:24:20,054 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:24:20,055 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-19 18:24:20,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:20 BoogieIcfgContainer [2020-10-19 18:24:20,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:24:20,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:24:20,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:24:20,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:24:20,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:24:19" (1/3) ... [2020-10-19 18:24:20,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105bf2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:24:20, skipping insertion in model container [2020-10-19 18:24:20,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:19" (2/3) ... [2020-10-19 18:24:20,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105bf2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:24:20, skipping insertion in model container [2020-10-19 18:24:20,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:20" (3/3) ... [2020-10-19 18:24:20,069 INFO L111 eAbstractionObserver]: Analyzing ICFG scopes4-2.c [2020-10-19 18:24:20,086 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:24:20,094 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-10-19 18:24:20,112 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-19 18:24:20,136 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:24:20,137 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:24:20,137 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:24:20,138 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:24:20,138 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:24:20,138 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:24:20,138 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:24:20,138 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:24:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-19 18:24:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:24:20,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:20,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:20,169 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-19 18:24:20,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:20,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1728099290, now seen corresponding path program 1 times [2020-10-19 18:24:20,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:20,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693826297] [2020-10-19 18:24:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:20,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:20,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693826297] [2020-10-19 18:24:20,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:20,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:24:20,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555706965] [2020-10-19 18:24:20,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:20,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:20,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:20,472 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-10-19 18:24:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:20,574 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2020-10-19 18:24:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:20,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:24:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:20,588 INFO L225 Difference]: With dead ends: 27 [2020-10-19 18:24:20,589 INFO L226 Difference]: Without dead ends: 24 [2020-10-19 18:24:20,591 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 [2020-10-19 18:24:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-19 18:24:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-19 18:24:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 18:24:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-10-19 18:24:20,633 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 10 [2020-10-19 18:24:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:20,633 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-10-19 18:24:20,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-10-19 18:24:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:24:20,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:20,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:20,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:24:20,635 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-19 18:24:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1728099291, now seen corresponding path program 1 times [2020-10-19 18:24:20,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:20,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695332387] [2020-10-19 18:24:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:20,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:20,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695332387] [2020-10-19 18:24:20,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:20,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:24:20,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2428834] [2020-10-19 18:24:20,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:20,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:20,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:20,765 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand 4 states. [2020-10-19 18:24:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:20,818 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-10-19 18:24:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:20,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:24:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:20,820 INFO L225 Difference]: With dead ends: 23 [2020-10-19 18:24:20,820 INFO L226 Difference]: Without dead ends: 23 [2020-10-19 18:24:20,821 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 [2020-10-19 18:24:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-19 18:24:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-19 18:24:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 18:24:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-19 18:24:20,827 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 10 [2020-10-19 18:24:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:20,827 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-19 18:24:20,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-19 18:24:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:24:20,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:20,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:20,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:24:20,829 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-19 18:24:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:20,830 INFO L82 PathProgramCache]: Analyzing trace with hash 688977249, now seen corresponding path program 1 times [2020-10-19 18:24:20,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:20,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978624352] [2020-10-19 18:24:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:24:20,875 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:24:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:24:20,947 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:24:20,985 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:24:20,986 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:24:20,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:24:21,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:24:21 BoogieIcfgContainer [2020-10-19 18:24:21,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:24:21,015 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:24:21,015 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:24:21,015 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:24:21,016 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:20" (3/4) ... [2020-10-19 18:24:21,018 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:24:21,069 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:24:21,069 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:24:21,072 INFO L168 Benchmark]: Toolchain (without parser) took 1855.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -113.0 MB). Peak memory consumption was 38.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:21,073 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:24:21,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.84 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:21,074 INFO L168 Benchmark]: Boogie Preprocessor took 153.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -192.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:21,075 INFO L168 Benchmark]: RCFGBuilder took 377.99 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:21,076 INFO L168 Benchmark]: TraceAbstraction took 955.41 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: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:21,077 INFO L168 Benchmark]: Witness Printer took 54.43 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. [2020-10-19 18:24:21,081 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 303.84 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 153.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -192.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 377.99 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 955.41 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: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 11.5 GB. * Witness Printer took 54.43 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: 18]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L17] CALL, EXPR foo() [L12] int arr[123]; [L13] CALL, EXPR foo2() [L5] int arr[1024]; VAL [arr={5:0}] [L6] arr[194] = 13 VAL [arr={5:0}] [L7] return arr + 1; [L7] return arr + 1; VAL [\result={5:4}] [L13] RET, EXPR foo2() VAL [foo2()={5:4}] [L13] return foo2(); [L17] RET, EXPR foo() VAL [foo()={5:4}] [L17] int *a = foo(); [L18] \read(*a) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 5 SDslu, 33 SDs, 0 SdLazy, 57 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 594 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...