./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memset2.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_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/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 89c40e0e226fdcfbda8631272bf2c238348d58a6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:02:20,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:02:20,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:02:20,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:02:20,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:02:20,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:02:20,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:02:20,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:02:20,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:02:20,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:02:20,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:02:20,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:02:20,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:02:20,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:02:20,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:02:20,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:02:20,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:02:20,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:02:20,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:02:20,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:02:20,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:02:20,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:02:20,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:02:20,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:02:20,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:02:20,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:02:20,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:02:20,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:02:20,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:02:20,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:02:20,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:02:20,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:02:20,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:02:20,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:02:20,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:02:20,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:02:20,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:02:20,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:02:20,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:02:20,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:02:20,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:02:20,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:02:21,038 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:02:21,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:02:21,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:02:21,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:02:21,041 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:02:21,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:02:21,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:02:21,041 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:02:21,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:02:21,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:02:21,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:02:21,042 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:02:21,042 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:02:21,043 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:02:21,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:02:21,043 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:02:21,043 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:02:21,043 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:02:21,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:02:21,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:02:21,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:02:21,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:02:21,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:02:21,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:02:21,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:02:21,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:02:21,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:02:21,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:02:21,046 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_116e0a41-f860-4456-b029-5180479b2d33/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89c40e0e226fdcfbda8631272bf2c238348d58a6 [2020-11-28 03:02:21,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:02:21,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:02:21,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:02:21,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:02:21,399 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:02:21,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/memset2.c [2020-11-28 03:02:21,479 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/data/693db5413/8d49e07bd16b4583a6096cbf43fadfed/FLAG52a151e00 [2020-11-28 03:02:22,020 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:02:22,021 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/sv-benchmarks/c/ldv-memsafety/memset2.c [2020-11-28 03:02:22,032 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/data/693db5413/8d49e07bd16b4583a6096cbf43fadfed/FLAG52a151e00 [2020-11-28 03:02:22,397 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/data/693db5413/8d49e07bd16b4583a6096cbf43fadfed [2020-11-28 03:02:22,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:02:22,400 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:02:22,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:22,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:02:22,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:02:22,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffc353f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22, skipping insertion in model container [2020-11-28 03:02:22,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:02:22,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:02:22,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:22,581 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:02:22,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:22,643 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:02:22,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22 WrapperNode [2020-11-28 03:02:22,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:22,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:02:22,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:02:22,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:02:22,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:02:22,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:02:22,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:02:22,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:02:22,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/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 03:02:22,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:02:22,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:02:22,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:02:22,762 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-11-28 03:02:22,763 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-11-28 03:02:22,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:02:22,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:02:22,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-11-28 03:02:22,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:02:22,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:02:22,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:02:22,904 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-28 03:02:23,088 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:02:23,089 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-28 03:02:23,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:23 BoogieIcfgContainer [2020-11-28 03:02:23,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:02:23,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:02:23,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:02:23,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:02:23,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:02:22" (1/3) ... [2020-11-28 03:02:23,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f50a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:23, skipping insertion in model container [2020-11-28 03:02:23,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (2/3) ... [2020-11-28 03:02:23,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f50a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:23, skipping insertion in model container [2020-11-28 03:02:23,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:23" (3/3) ... [2020-11-28 03:02:23,103 INFO L111 eAbstractionObserver]: Analyzing ICFG memset2.c [2020-11-28 03:02:23,117 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:02:23,122 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 03:02:23,135 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 03:02:23,156 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:02:23,156 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:02:23,157 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:02:23,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:02:23,157 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:02:23,157 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:02:23,158 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:02:23,158 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:02:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-28 03:02:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 03:02:23,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:23,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:23,185 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:02:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:23,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2020-11-28 03:02:23,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:23,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336333963] [2020-11-28 03:02:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,413 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 03:02:23,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336333963] [2020-11-28 03:02:23,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:23,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:02:23,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564728107] [2020-11-28 03:02:23,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:23,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:23,439 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-11-28 03:02:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:23,560 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-11-28 03:02:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:23,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 03:02:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:23,571 INFO L225 Difference]: With dead ends: 19 [2020-11-28 03:02:23,572 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 03:02:23,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 03:02:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 03:02:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 03:02:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-28 03:02:23,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2020-11-28 03:02:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:23,631 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-28 03:02:23,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-28 03:02:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 03:02:23,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:23,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:23,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:02:23,634 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:02:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2020-11-28 03:02:23,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:23,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22058040] [2020-11-28 03:02:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,782 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 03:02:23,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22058040] [2020-11-28 03:02:23,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:23,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:02:23,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513930485] [2020-11-28 03:02:23,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:23,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:23,787 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2020-11-28 03:02:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:23,831 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-28 03:02:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:23,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 03:02:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:23,833 INFO L225 Difference]: With dead ends: 15 [2020-11-28 03:02:23,833 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 03:02:23,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 03:02:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 03:02:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 03:02:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-28 03:02:23,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2020-11-28 03:02:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:23,838 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-28 03:02:23,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-28 03:02:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:02:23,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:23,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:23,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:02:23,840 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:02:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1462327129, now seen corresponding path program 1 times [2020-11-28 03:02:23,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:23,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641667287] [2020-11-28 03:02:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-28 03:02:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,918 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 03:02:23,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641667287] [2020-11-28 03:02:23,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:23,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:02:23,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565602417] [2020-11-28 03:02:23,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:02:23,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:23,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:02:23,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:02:23,921 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-11-28 03:02:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:23,999 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-11-28 03:02:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:02:24,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-28 03:02:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:24,001 INFO L225 Difference]: With dead ends: 18 [2020-11-28 03:02:24,001 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 03:02:24,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:02:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 03:02:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 03:02:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 03:02:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-28 03:02:24,005 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-11-28 03:02:24,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:24,006 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-28 03:02:24,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:02:24,006 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-28 03:02:24,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:02:24,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:24,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:24,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:02:24,007 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:02:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1971150090, now seen corresponding path program 1 times [2020-11-28 03:02:24,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:24,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391179244] [2020-11-28 03:02:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-28 03:02:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:24,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391179244] [2020-11-28 03:02:24,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542280701] [2020-11-28 03:02:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:02:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:24,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:24,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-11-28 03:02:24,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303483218] [2020-11-28 03:02:24,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:02:24,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:02:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:02:24,267 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2020-11-28 03:02:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:24,394 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-11-28 03:02:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:02:24,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-28 03:02:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:24,398 INFO L225 Difference]: With dead ends: 19 [2020-11-28 03:02:24,398 INFO L226 Difference]: Without dead ends: 17 [2020-11-28 03:02:24,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:02:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-28 03:02:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-28 03:02:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:02:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-28 03:02:24,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-11-28 03:02:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:24,403 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-28 03:02:24,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:02:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-28 03:02:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:02:24,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:24,404 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:24,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:24,618 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:02:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1034761479, now seen corresponding path program 2 times [2020-11-28 03:02:24,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:24,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009229067] [2020-11-28 03:02:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-28 03:02:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:24,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009229067] [2020-11-28 03:02:24,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006116239] [2020-11-28 03:02:24,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:24,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:02:24,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:02:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:02:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:24,902 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2020-11-28 03:02:24,904 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:24,908 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:24,909 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:02:24,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-11-28 03:02:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 03:02:25,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:02:25,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-11-28 03:02:25,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166787823] [2020-11-28 03:02:25,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:02:25,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:25,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:02:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:02:25,017 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-11-28 03:02:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:25,091 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-28 03:02:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:02:25,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-28 03:02:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:25,092 INFO L225 Difference]: With dead ends: 16 [2020-11-28 03:02:25,092 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:02:25,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:02:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:02:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:02:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:02:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:02:25,094 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-28 03:02:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:25,095 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:02:25,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:02:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:02:25,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:02:25,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:25,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:02:25 BoogieIcfgContainer [2020-11-28 03:02:25,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:02:25,310 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:02:25,310 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:02:25,310 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:02:25,311 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:23" (3/4) ... [2020-11-28 03:02:25,314 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:02:25,319 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:02:25,320 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.C_memset [2020-11-28 03:02:25,320 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:02:25,325 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 03:02:25,326 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 03:02:25,326 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:02:25,326 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:02:25,367 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_116e0a41-f860-4456-b029-5180479b2d33/bin/uautomizer/witness.graphml [2020-11-28 03:02:25,368 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:02:25,369 INFO L168 Benchmark]: Toolchain (without parser) took 2968.14 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 74.7 MB in the beginning and 58.1 MB in the end (delta: 16.5 MB). Peak memory consumption was 36.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:25,373 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 79.7 MB. Free memory was 37.3 MB in the beginning and 37.3 MB in the end (delta: 37.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:25,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.29 ms. Allocated memory is still 104.9 MB. Free memory was 74.7 MB in the beginning and 83.1 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:25,377 INFO L168 Benchmark]: Boogie Preprocessor took 31.57 ms. Allocated memory is still 104.9 MB. Free memory was 83.1 MB in the beginning and 81.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:25,377 INFO L168 Benchmark]: RCFGBuilder took 413.59 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 70.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:25,378 INFO L168 Benchmark]: TraceAbstraction took 2216.30 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.5 MB in the beginning and 60.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 33.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:25,378 INFO L168 Benchmark]: Witness Printer took 57.80 ms. Allocated memory is still 125.8 MB. Free memory was 60.2 MB in the beginning and 58.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:25,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 79.7 MB. Free memory was 37.3 MB in the beginning and 37.3 MB in the end (delta: 37.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.29 ms. Allocated memory is still 104.9 MB. Free memory was 74.7 MB in the beginning and 83.1 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.57 ms. Allocated memory is still 104.9 MB. Free memory was 83.1 MB in the beginning and 81.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 413.59 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 70.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2216.30 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.5 MB in the beginning and 60.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 33.3 MB. Max. memory is 16.1 GB. * Witness Printer took 57.80 ms. Allocated memory is still 125.8 MB. Free memory was 60.2 MB in the beginning and 58.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 34 SDslu, 65 SDs, 0 SdLazy, 123 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 90 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 83 ConstructedInterpolants, 8 QuantifiedInterpolants, 3158 SizeOfPredicates, 1 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 3/8 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 correct! Received shutdown request...