./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/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 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 0.2.0-a4ecdab [2020-11-28 03:08:55,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:08:55,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:08:55,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:08:55,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:08:55,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:08:55,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:08:55,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:08:55,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:08:55,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:08:55,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:08:55,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:08:55,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:08:55,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:08:55,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:08:55,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:08:55,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:08:55,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:08:55,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:08:55,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:08:55,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:08:55,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:08:55,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:08:55,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:08:55,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:08:55,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:08:55,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:08:55,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:08:55,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:08:55,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:08:55,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:08:55,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:08:55,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:08:55,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:08:55,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:08:55,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:08:55,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:08:55,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:08:55,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:08:55,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:08:55,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:08:55,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:08:55,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:08:55,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:08:55,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:08:55,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:08:55,447 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:08:55,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:08:55,447 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:08:55,448 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:08:55,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:08:55,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:08:55,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:08:55,449 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:08:55,450 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:08:55,450 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:08:55,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:08:55,450 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:08:55,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:08:55,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:08:55,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:08:55,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:08:55,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:08:55,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:08:55,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:08:55,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:08:55,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:08:55,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:08:55,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:08:55,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:08:55,453 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_1569a005-f028-48fd-83a1-bf299e56ed87/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d452f938d74713dbff7e0330f8ef393409d67ffe [2020-11-28 03:08:55,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:08:55,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:08:55,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:08:55,839 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:08:55,840 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:08:55,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2020-11-28 03:08:55,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/data/f44c4fb31/46d58253626942ce9a75eee6378f7a9b/FLAG8eae94fa6 [2020-11-28 03:08:56,428 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:08:56,428 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2020-11-28 03:08:56,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/data/f44c4fb31/46d58253626942ce9a75eee6378f7a9b/FLAG8eae94fa6 [2020-11-28 03:08:56,813 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/data/f44c4fb31/46d58253626942ce9a75eee6378f7a9b [2020-11-28 03:08:56,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:08:56,818 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:08:56,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:08:56,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:08:56,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:08:56,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:08:56" (1/1) ... [2020-11-28 03:08:56,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cde34f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:56, skipping insertion in model container [2020-11-28 03:08:56,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:08:56" (1/1) ... [2020-11-28 03:08:56,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:08:56,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:08:57,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:08:57,060 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:08:57,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:08:57,100 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:08:57,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57 WrapperNode [2020-11-28 03:08:57,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:08:57,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:08:57,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:08:57,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:08:57,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (1/1) ... [2020-11-28 03:08:57,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (1/1) ... [2020-11-28 03:08:57,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (1/1) ... [2020-11-28 03:08:57,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (1/1) ... [2020-11-28 03:08:57,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (1/1) ... [2020-11-28 03:08:57,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (1/1) ... [2020-11-28 03:08:57,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (1/1) ... [2020-11-28 03:08:57,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:08:57,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:08:57,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:08:57,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:08:57,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/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 [2020-11-28 03:08:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:08:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:08:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure freePointer [2020-11-28 03:08:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:08:57,211 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-28 03:08:57,211 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-28 03:08:57,211 INFO L130 BoogieDeclarations]: Found specification of procedure freePointer [2020-11-28 03:08:57,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:08:57,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:08:57,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:08:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:08:57,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:08:57,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:08:57,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:08:57,461 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:08:57,461 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-28 03:08:57,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:57 BoogieIcfgContainer [2020-11-28 03:08:57,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:08:57,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:08:57,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:08:57,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:08:57,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:08:56" (1/3) ... [2020-11-28 03:08:57,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5193c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:08:57, skipping insertion in model container [2020-11-28 03:08:57,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:57" (2/3) ... [2020-11-28 03:08:57,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5193c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:08:57, skipping insertion in model container [2020-11-28 03:08:57,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:57" (3/3) ... [2020-11-28 03:08:57,490 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2020-11-28 03:08:57,504 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:08:57,510 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-28 03:08:57,523 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-28 03:08:57,551 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:08:57,551 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:08:57,551 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:08:57,551 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:08:57,552 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:08:57,552 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:08:57,552 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:08:57,552 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:08:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-28 03:08:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:08:57,573 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:57,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:57,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:08:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:57,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1608321379, now seen corresponding path program 1 times [2020-11-28 03:08:57,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:57,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223892964] [2020-11-28 03:08:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:57,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:08:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:57,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223892964] [2020-11-28 03:08:57,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:08:57,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:08:57,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549973754] [2020-11-28 03:08:57,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:08:57,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:08:57,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:08:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:08:57,959 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-11-28 03:08:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:08:58,222 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2020-11-28 03:08:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:08:58,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-28 03:08:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:08:58,239 INFO L225 Difference]: With dead ends: 24 [2020-11-28 03:08:58,240 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 03:08:58,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:08:58,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 03:08:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 03:08:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 03:08:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2020-11-28 03:08:58,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 9 [2020-11-28 03:08:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:08:58,295 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2020-11-28 03:08:58,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:08:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2020-11-28 03:08:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:08:58,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:58,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:58,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:08:58,297 INFO L429 AbstractCegarLoop]: === Iteration 2 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:08:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1681644769, now seen corresponding path program 1 times [2020-11-28 03:08:58,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:58,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108990277] [2020-11-28 03:08:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:58,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:08:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:58,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108990277] [2020-11-28 03:08:58,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:08:58,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:08:58,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944757885] [2020-11-28 03:08:58,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:08:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:08:58,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:08:58,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:08:58,522 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 6 states. [2020-11-28 03:08:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:08:58,688 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2020-11-28 03:08:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:08:58,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 03:08:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:08:58,691 INFO L225 Difference]: With dead ends: 20 [2020-11-28 03:08:58,691 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 03:08:58,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:08:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 03:08:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-28 03:08:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:08:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-11-28 03:08:58,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 10 [2020-11-28 03:08:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:08:58,698 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-11-28 03:08:58,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:08:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-11-28 03:08:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:08:58,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:58,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:58,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:08:58,703 INFO L429 AbstractCegarLoop]: === Iteration 3 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:08:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:58,705 INFO L82 PathProgramCache]: Analyzing trace with hash -591380251, now seen corresponding path program 1 times [2020-11-28 03:08:58,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:58,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686290742] [2020-11-28 03:08:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:58,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:08:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:58,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686290742] [2020-11-28 03:08:58,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:08:58,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:08:58,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126377629] [2020-11-28 03:08:58,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:08:58,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:08:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:08:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:08:58,825 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand 6 states. [2020-11-28 03:08:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:08:58,987 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2020-11-28 03:08:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:08:58,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-28 03:08:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:08:58,989 INFO L225 Difference]: With dead ends: 19 [2020-11-28 03:08:58,989 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:08:58,989 INFO L677 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 [2020-11-28 03:08:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:08:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 03:08:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:08:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-11-28 03:08:58,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 11 [2020-11-28 03:08:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:08:58,994 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-11-28 03:08:58,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:08:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-11-28 03:08:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:08:58,995 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:58,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:58,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:08:58,996 INFO L429 AbstractCegarLoop]: === Iteration 4 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:08:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:58,997 INFO L82 PathProgramCache]: Analyzing trace with hash 146827991, now seen corresponding path program 1 times [2020-11-28 03:08:58,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:58,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917993542] [2020-11-28 03:08:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:08:59,018 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:08:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:08:59,035 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:08:59,059 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:08:59,059 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:08:59,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:08:59,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:08:59 BoogieIcfgContainer [2020-11-28 03:08:59,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:08:59,085 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:08:59,085 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:08:59,086 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:08:59,086 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:57" (3/4) ... [2020-11-28 03:08:59,089 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:08:59,129 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1569a005-f028-48fd-83a1-bf299e56ed87/bin/uautomizer/witness.graphml [2020-11-28 03:08:59,129 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:08:59,132 INFO L168 Benchmark]: Toolchain (without parser) took 2312.76 ms. Allocated memory is still 94.4 MB. Free memory was 62.1 MB in the beginning and 67.7 MB in the end (delta: -5.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:59,132 INFO L168 Benchmark]: CDTParser took 0.89 ms. Allocated memory is still 69.2 MB. Free memory was 44.8 MB in the beginning and 44.8 MB in the end (delta: 26.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:59,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.84 ms. Allocated memory is still 94.4 MB. Free memory was 62.0 MB in the beginning and 74.0 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:59,134 INFO L168 Benchmark]: Boogie Preprocessor took 29.76 ms. Allocated memory is still 94.4 MB. Free memory was 74.0 MB in the beginning and 72.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:59,135 INFO L168 Benchmark]: RCFGBuilder took 327.53 ms. Allocated memory is still 94.4 MB. Free memory was 72.7 MB in the beginning and 61.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:59,136 INFO L168 Benchmark]: TraceAbstraction took 1620.18 ms. Allocated memory is still 94.4 MB. Free memory was 61.0 MB in the beginning and 69.1 MB in the end (delta: -8.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:59,136 INFO L168 Benchmark]: Witness Printer took 44.31 ms. Allocated memory is still 94.4 MB. Free memory was 69.1 MB in the beginning and 67.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:59,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.89 ms. Allocated memory is still 69.2 MB. Free memory was 44.8 MB in the beginning and 44.8 MB in the end (delta: 26.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 283.84 ms. Allocated memory is still 94.4 MB. Free memory was 62.0 MB in the beginning and 74.0 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.76 ms. Allocated memory is still 94.4 MB. Free memory was 74.0 MB in the beginning and 72.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 327.53 ms. Allocated memory is still 94.4 MB. Free memory was 72.7 MB in the beginning and 61.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1620.18 ms. Allocated memory is still 94.4 MB. Free memory was 61.0 MB in the beginning and 69.1 MB in the end (delta: -8.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 44.31 ms. Allocated memory is still 94.4 MB. Free memory was 69.1 MB in the beginning and 67.7 MB in the end (delta: 1.4 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: 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))={2:0}, p={2:0}] [L12] CALL freePointer(p) VAL [p={2:0}] [L6] free(p) VAL [p={2:0}, p={2:0}] [L6] free(p) VAL [p={2:0}, p={2:0}] [L6] free(p) [L12] RET freePointer(p) VAL [malloc(10 * sizeof(int))={2:0}, p={2:0}] [L14] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 47 SDslu, 75 SDs, 0 SdLazy, 114 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s 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, 0.4s 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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...