./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c 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/derefAfterFree1.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 d452f938d74713dbff7e0330f8ef393409d67ffe ....................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 20:19:05,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:19:05,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:19:05,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:19:05,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:19:05,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:19:05,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:19:05,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:19:05,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:19:05,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:19:05,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:19:05,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:19:05,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:19:05,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:19:05,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:19:05,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:19:05,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:19:05,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:19:05,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:19:05,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:19:05,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:19:05,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:19:05,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:19:05,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:19:05,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:19:05,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:19:05,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:19:05,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:19:05,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:19:05,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:19:05,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:19:05,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:19:05,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:19:05,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:19:05,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:19:05,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:19:05,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:19:05,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:19:05,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:19:05,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:19:05,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:19:05,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-28 20:19:05,595 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:19:05,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:19:05,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:19:05,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:19:05,598 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:19:05,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:19:05,598 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 20:19:05,598 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:19:05,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:19:05,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 20:19:05,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:19:05,600 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-28 20:19:05,600 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-28 20:19:05,600 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-28 20:19:05,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:19:05,601 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-28 20:19:05,601 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 20:19:05,601 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:19:05,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:19:05,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:19:05,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:19:05,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:19:05,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:19:05,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:19:05,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:19:05,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:19:05,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:19:05,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:19:05,605 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 -> d452f938d74713dbff7e0330f8ef393409d67ffe [2019-11-28 20:19:05,903 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:19:05,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:19:05,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:19:05,927 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:19:05,928 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:19:05,929 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2019-11-28 20:19:06,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a66267c76/a604ae2e3a65484ab6de630225cdb029/FLAGe52cbf9ab [2019-11-28 20:19:06,501 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:19:06,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2019-11-28 20:19:06,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a66267c76/a604ae2e3a65484ab6de630225cdb029/FLAGe52cbf9ab [2019-11-28 20:19:06,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a66267c76/a604ae2e3a65484ab6de630225cdb029 [2019-11-28 20:19:06,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:19:06,866 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-28 20:19:06,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:19:06,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:19:06,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:19:06,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:19:06" (1/1) ... [2019-11-28 20:19:06,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d5cbb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:06, skipping insertion in model container [2019-11-28 20:19:06,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:19:06" (1/1) ... [2019-11-28 20:19:06,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:19:06,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:19:07,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:19:07,068 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:19:07,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:19:07,095 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:19:07,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07 WrapperNode [2019-11-28 20:19:07,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:19:07,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:19:07,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:19:07,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:19:07,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (1/1) ... [2019-11-28 20:19:07,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (1/1) ... [2019-11-28 20:19:07,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (1/1) ... [2019-11-28 20:19:07,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (1/1) ... [2019-11-28 20:19:07,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (1/1) ... [2019-11-28 20:19:07,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (1/1) ... [2019-11-28 20:19:07,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (1/1) ... [2019-11-28 20:19:07,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:19:07,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:19:07,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:19:07,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:19:07,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (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 [2019-11-28 20:19:07,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-28 20:19:07,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:19:07,235 INFO L138 BoogieDeclarations]: Found implementation of procedure freePointer [2019-11-28 20:19:07,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-28 20:19:07,235 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-28 20:19:07,235 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-28 20:19:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure freePointer [2019-11-28 20:19:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 20:19:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-28 20:19:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 20:19:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 20:19:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-28 20:19:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:19:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 20:19:07,461 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:19:07,461 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-28 20:19:07,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:07 BoogieIcfgContainer [2019-11-28 20:19:07,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:19:07,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:19:07,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:19:07,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:19:07,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:19:06" (1/3) ... [2019-11-28 20:19:07,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae8639a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:19:07, skipping insertion in model container [2019-11-28 20:19:07,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:07" (2/3) ... [2019-11-28 20:19:07,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae8639a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:19:07, skipping insertion in model container [2019-11-28 20:19:07,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:07" (3/3) ... [2019-11-28 20:19:07,492 INFO L109 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2019-11-28 20:19:07,506 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:19:07,514 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-28 20:19:07,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-28 20:19:07,585 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:19:07,585 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-28 20:19:07,586 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:19:07,586 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:19:07,586 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:19:07,586 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:19:07,587 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:19:07,594 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:19:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-28 20:19:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 20:19:07,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:07,629 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:07,629 INFO L410 AbstractCegarLoop]: === Iteration 1 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:19:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1608321379, now seen corresponding path program 1 times [2019-11-28 20:19:07,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:07,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442176292] [2019-11-28 20:19:07,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:07,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442176292] [2019-11-28 20:19:07,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:19:07,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 20:19:07,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098542126] [2019-11-28 20:19:07,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:19:07,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:07,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:19:07,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:19:07,905 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2019-11-28 20:19:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:08,097 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2019-11-28 20:19:08,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 20:19:08,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-28 20:19:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:08,110 INFO L225 Difference]: With dead ends: 24 [2019-11-28 20:19:08,110 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 20:19:08,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:19:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 20:19:08,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-28 20:19:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 20:19:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2019-11-28 20:19:08,168 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 9 [2019-11-28 20:19:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:08,168 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2019-11-28 20:19:08,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:19:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2019-11-28 20:19:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 20:19:08,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:08,170 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:08,171 INFO L410 AbstractCegarLoop]: === Iteration 2 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:19:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1681644769, now seen corresponding path program 1 times [2019-11-28 20:19:08,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:08,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627478665] [2019-11-28 20:19:08,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:08,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627478665] [2019-11-28 20:19:08,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:19:08,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 20:19:08,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426270600] [2019-11-28 20:19:08,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:19:08,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:08,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:19:08,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:19:08,303 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 6 states. [2019-11-28 20:19:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:08,440 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2019-11-28 20:19:08,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 20:19:08,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-28 20:19:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:08,442 INFO L225 Difference]: With dead ends: 20 [2019-11-28 20:19:08,442 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 20:19:08,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-28 20:19:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 20:19:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 20:19:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 20:19:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2019-11-28 20:19:08,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 10 [2019-11-28 20:19:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:08,452 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2019-11-28 20:19:08,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:19:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2019-11-28 20:19:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 20:19:08,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:08,454 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:08,454 INFO L410 AbstractCegarLoop]: === Iteration 3 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:19:08,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash -591380251, now seen corresponding path program 1 times [2019-11-28 20:19:08,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:08,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155330744] [2019-11-28 20:19:08,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:08,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155330744] [2019-11-28 20:19:08,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:19:08,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 20:19:08,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997393340] [2019-11-28 20:19:08,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:19:08,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:08,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:19:08,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:19:08,569 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand 6 states. [2019-11-28 20:19:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:08,658 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2019-11-28 20:19:08,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:19:08,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-28 20:19:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:08,660 INFO L225 Difference]: With dead ends: 19 [2019-11-28 20:19:08,660 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 20:19:08,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:19:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 20:19:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-28 20:19:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 20:19:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2019-11-28 20:19:08,666 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 11 [2019-11-28 20:19:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:08,667 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2019-11-28 20:19:08,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:19:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2019-11-28 20:19:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 20:19:08,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:08,668 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:08,669 INFO L410 AbstractCegarLoop]: === Iteration 4 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:19:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:08,669 INFO L82 PathProgramCache]: Analyzing trace with hash 146827991, now seen corresponding path program 1 times [2019-11-28 20:19:08,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:08,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169835808] [2019-11-28 20:19:08,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:19:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:19:08,767 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:19:08,768 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 20:19:08,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:19:08 BoogieIcfgContainer [2019-11-28 20:19:08,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:19:08,792 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:19:08,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:19:08,793 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:19:08,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:07" (3/4) ... [2019-11-28 20:19:08,796 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 20:19:08,843 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:19:08,843 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:19:08,846 INFO L168 Benchmark]: Toolchain (without parser) took 1979.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 955.0 MB in the beginning and 1.0 GB in the end (delta: -85.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:08,847 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:19:08,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.67 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:08,849 INFO L168 Benchmark]: Boogie Preprocessor took 83.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -187.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:08,850 INFO L168 Benchmark]: RCFGBuilder took 283.39 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: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:08,851 INFO L168 Benchmark]: TraceAbstraction took 1321.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.3 MB). Peak memory consumption was 80.3 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:08,852 INFO L168 Benchmark]: Witness Printer took 51.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:19:08,856 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 228.67 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 83.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -187.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 283.39 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: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1321.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.3 MB). Peak memory consumption was 80.3 MB. Max. memory is 11.5 GB. * Witness Printer took 51.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); VAL [malloc(10 * sizeof(int))={3:0}, p={3:0}] [L12] CALL freePointer(p) VAL [p={3:0}] [L6] free(p) VAL [p={3:0}, p={3:0}] [L6] free(p) VAL [p={3:0}, p={3:0}] [L6] free(p) [L12] RET freePointer(p) VAL [malloc(10 * sizeof(int))={3:0}, p={3:0}] [L14] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 6 error locations. Result: UNSAFE, OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 47 SDslu, 75 SDs, 0 SdLazy, 114 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 880 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...