./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-7b2dab5 [2020-12-09 05:02:59,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:02:59,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:02:59,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:02:59,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:02:59,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:02:59,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:02:59,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:02:59,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:02:59,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:02:59,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:02:59,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:02:59,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:02:59,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:02:59,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:02:59,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:02:59,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:02:59,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:02:59,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:02:59,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:02:59,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:02:59,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:02:59,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:02:59,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:02:59,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:02:59,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:02:59,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:02:59,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:02:59,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:02:59,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:02:59,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:02:59,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:02:59,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:02:59,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:02:59,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:02:59,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:02:59,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:02:59,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:02:59,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:02:59,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:02:59,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:02:59,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 05:02:59,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:02:59,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:02:59,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:02:59,973 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:02:59,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:02:59,973 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:02:59,973 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:02:59,974 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:02:59,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:02:59,974 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:02:59,974 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:02:59,974 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:02:59,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:02:59,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:02:59,974 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:02:59,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 05:02:59,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 05:02:59,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:02:59,975 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:02:59,975 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 05:02:59,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:02:59,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:02:59,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:02:59,976 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 05:02:59,976 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 05:02:59,976 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 05:02:59,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:02:59,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:02:59,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:02:59,977 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:02:59,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:02:59,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:02:59,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:02:59,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:02:59,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:02:59,977 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:02:59,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:02:59,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:02:59,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:02:59,978 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2020-12-09 05:03:00,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:03:00,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:03:00,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:03:00,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:03:00,161 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:03:00,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-12-09 05:03:00,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/data/8cfe338f5/d2fb1339f5be4971aab5564695a67b46/FLAG60623c583 [2020-12-09 05:03:00,583 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:03:00,584 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-12-09 05:03:00,589 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/data/8cfe338f5/d2fb1339f5be4971aab5564695a67b46/FLAG60623c583 [2020-12-09 05:03:00,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/data/8cfe338f5/d2fb1339f5be4971aab5564695a67b46 [2020-12-09 05:03:00,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:03:00,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:03:00,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:03:00,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:03:00,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:03:00,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3937384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00, skipping insertion in model container [2020-12-09 05:03:00,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:03:00,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:03:00,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:03:00,741 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:03:00,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:03:00,762 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:03:00,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00 WrapperNode [2020-12-09 05:03:00,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:03:00,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:03:00,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:03:00,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:03:00,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:03:00,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:03:00,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:03:00,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:03:00,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... [2020-12-09 05:03:00,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:03:00,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:03:00,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:03:00,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:03:00,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/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 [2020-12-09 05:03:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 05:03:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 05:03:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:03:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:03:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 05:03:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:03:01,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:03:01,197 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 05:03:01,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:01 BoogieIcfgContainer [2020-12-09 05:03:01,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:03:01,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:03:01,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:03:01,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:03:01,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:03:00" (1/3) ... [2020-12-09 05:03:01,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b64a3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:03:01, skipping insertion in model container [2020-12-09 05:03:01,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:00" (2/3) ... [2020-12-09 05:03:01,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b64a3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:03:01, skipping insertion in model container [2020-12-09 05:03:01,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:01" (3/3) ... [2020-12-09 05:03:01,207 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2020-12-09 05:03:01,220 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:03:01,223 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-09 05:03:01,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-09 05:03:01,252 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:03:01,252 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 05:03:01,252 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:03:01,252 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:03:01,253 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:03:01,253 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:03:01,253 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:03:01,253 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:03:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-09 05:03:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 05:03:01,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:01,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 05:03:01,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash 76559, now seen corresponding path program 1 times [2020-12-09 05:03:01,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:01,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080809636] [2020-12-09 05:03:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:01,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080809636] [2020-12-09 05:03:01,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:01,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:03:01,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544588950] [2020-12-09 05:03:01,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:03:01,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:03:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:01,393 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-12-09 05:03:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:01,413 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-09 05:03:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:01,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 05:03:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:01,423 INFO L225 Difference]: With dead ends: 21 [2020-12-09 05:03:01,423 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 05:03:01,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 05:03:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-12-09 05:03:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 05:03:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-09 05:03:01,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 3 [2020-12-09 05:03:01,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:01,451 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-09 05:03:01,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:03:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-09 05:03:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 05:03:01,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:01,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 05:03:01,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:03:01,452 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash 75280, now seen corresponding path program 1 times [2020-12-09 05:03:01,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:01,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026810381] [2020-12-09 05:03:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:01,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026810381] [2020-12-09 05:03:01,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:01,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:03:01,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084902136] [2020-12-09 05:03:01,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:03:01,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:01,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:03:01,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:01,476 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2020-12-09 05:03:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:01,492 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-09 05:03:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:01,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 05:03:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:01,492 INFO L225 Difference]: With dead ends: 15 [2020-12-09 05:03:01,493 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 05:03:01,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 05:03:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 05:03:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 05:03:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 05:03:01,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 3 [2020-12-09 05:03:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:01,495 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 05:03:01,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:03:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 05:03:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 05:03:01,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:01,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 05:03:01,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:03:01,496 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash 75281, now seen corresponding path program 1 times [2020-12-09 05:03:01,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:01,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297669429] [2020-12-09 05:03:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:01,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297669429] [2020-12-09 05:03:01,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:01,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:03:01,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25306509] [2020-12-09 05:03:01,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:03:01,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:01,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:03:01,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:01,528 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2020-12-09 05:03:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:01,550 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-09 05:03:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:01,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 05:03:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:01,552 INFO L225 Difference]: With dead ends: 16 [2020-12-09 05:03:01,552 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 05:03:01,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 05:03:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 05:03:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 05:03:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-09 05:03:01,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2020-12-09 05:03:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:01,555 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-09 05:03:01,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:03:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-09 05:03:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 05:03:01,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:01,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 05:03:01,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 05:03:01,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash 72381238, now seen corresponding path program 1 times [2020-12-09 05:03:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:01,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716075733] [2020-12-09 05:03:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:01,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716075733] [2020-12-09 05:03:01,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:01,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:03:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998917728] [2020-12-09 05:03:01,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:03:01,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:01,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:03:01,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:01,583 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-12-09 05:03:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:01,593 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-09 05:03:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:01,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 05:03:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:01,594 INFO L225 Difference]: With dead ends: 15 [2020-12-09 05:03:01,594 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 05:03:01,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 05:03:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 05:03:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 05:03:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 05:03:01,597 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2020-12-09 05:03:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:01,597 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 05:03:01,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:03:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 05:03:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 05:03:01,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:01,598 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 05:03:01,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 05:03:01,598 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:01,599 INFO L82 PathProgramCache]: Analyzing trace with hash 72379960, now seen corresponding path program 1 times [2020-12-09 05:03:01,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:01,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392552712] [2020-12-09 05:03:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:01,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392552712] [2020-12-09 05:03:01,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444983215] [2020-12-09 05:03:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/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 [2020-12-09 05:03:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:01,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 05:03:01,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:01,737 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-09 05:03:01,738 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 05:03:01,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 05:03:01,744 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 05:03:01,744 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-09 05:03:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:01,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:01,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148815157] [2020-12-09 05:03:01,804 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 05:03:01,804 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:03:01,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:03:01,812 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:03:01,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:03:02,088 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:03:02,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:03:02,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:03:02,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 05:03:02,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040207656] [2020-12-09 05:03:02,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:03:02,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:02,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:03:02,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 05:03:02,214 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-12-09 05:03:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:02,277 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-09 05:03:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:03:02,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 05:03:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:02,278 INFO L225 Difference]: With dead ends: 35 [2020-12-09 05:03:02,278 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 05:03:02,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 05:03:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 05:03:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2020-12-09 05:03:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 05:03:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-09 05:03:02,281 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 5 [2020-12-09 05:03:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:02,281 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-09 05:03:02,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:03:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-09 05:03:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 05:03:02,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:02,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 05:03:02,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:03:02,484 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:02,486 INFO L82 PathProgramCache]: Analyzing trace with hash 198927928, now seen corresponding path program 1 times [2020-12-09 05:03:02,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:02,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000675890] [2020-12-09 05:03:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:02,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000675890] [2020-12-09 05:03:02,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454344303] [2020-12-09 05:03:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/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 [2020-12-09 05:03:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 05:03:02,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:02,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:02,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14200905] [2020-12-09 05:03:02,695 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 05:03:02,695 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:03:02,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:03:02,696 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:03:02,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:03:02,884 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:03:03,047 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:03:03,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:03:03,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-09 05:03:03,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553071049] [2020-12-09 05:03:03,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 05:03:03,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:03,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 05:03:03,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-09 05:03:03,049 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-12-09 05:03:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:03,073 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-09 05:03:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 05:03:03,073 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-09 05:03:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:03,074 INFO L225 Difference]: With dead ends: 25 [2020-12-09 05:03:03,074 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 05:03:03,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-09 05:03:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 05:03:03,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-09 05:03:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 05:03:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-09 05:03:03,076 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2020-12-09 05:03:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:03,077 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-09 05:03:03,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 05:03:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-09 05:03:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 05:03:03,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:03,077 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 05:03:03,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:03:03,279 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1941212115, now seen corresponding path program 2 times [2020-12-09 05:03:03,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:03,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052144953] [2020-12-09 05:03:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:03,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052144953] [2020-12-09 05:03:03,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:03,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 05:03:03,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959239832] [2020-12-09 05:03:03,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 05:03:03,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:03,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 05:03:03,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:03:03,488 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-12-09 05:03:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:03,527 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-09 05:03:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 05:03:03,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 05:03:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:03,528 INFO L225 Difference]: With dead ends: 22 [2020-12-09 05:03:03,528 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 05:03:03,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:03:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 05:03:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 05:03:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 05:03:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-09 05:03:03,532 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 11 [2020-12-09 05:03:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:03,532 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-09 05:03:03,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 05:03:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-09 05:03:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 05:03:03,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:03,533 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-12-09 05:03:03,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-09 05:03:03,533 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash -409368164, now seen corresponding path program 2 times [2020-12-09 05:03:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:03,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928992578] [2020-12-09 05:03:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928992578] [2020-12-09 05:03:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397453321] [2020-12-09 05:03:03,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:03:03,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 05:03:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:03:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 05:03:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 05:03:03,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 05:03:03,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 05:03:03,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [8] total 9 [2020-12-09 05:03:03,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362084864] [2020-12-09 05:03:03,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:03:03,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:03,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:03:03,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-09 05:03:03,654 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 3 states. [2020-12-09 05:03:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:03,662 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-09 05:03:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:03,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-09 05:03:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:03,663 INFO L225 Difference]: With dead ends: 21 [2020-12-09 05:03:03,663 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 05:03:03,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-09 05:03:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 05:03:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 05:03:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 05:03:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-09 05:03:03,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-12-09 05:03:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:03,665 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-09 05:03:03,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:03:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-09 05:03:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 05:03:03,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:03,666 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:03,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-09 05:03:03,868 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1734187391, now seen corresponding path program 1 times [2020-12-09 05:03:03,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:03,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730827534] [2020-12-09 05:03:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:04,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730827534] [2020-12-09 05:03:04,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107018376] [2020-12-09 05:03:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:03:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 05:03:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:04,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:04,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239021675] [2020-12-09 05:03:04,157 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 05:03:04,157 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:03:04,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:03:04,157 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:03:04,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:03:04,293 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:03:04,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:03:04,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:03:04,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2020-12-09 05:03:04,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071810932] [2020-12-09 05:03:04,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 05:03:04,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 05:03:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-09 05:03:04,490 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-12-09 05:03:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:04,515 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-09 05:03:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 05:03:04,516 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-09 05:03:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:04,516 INFO L225 Difference]: With dead ends: 29 [2020-12-09 05:03:04,516 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 05:03:04,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-09 05:03:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 05:03:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 05:03:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 05:03:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-09 05:03:04,519 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 18 [2020-12-09 05:03:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:04,519 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-09 05:03:04,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 05:03:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-09 05:03:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 05:03:04,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:04,520 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:04,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:03:04,722 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:03:04,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1688088605, now seen corresponding path program 2 times [2020-12-09 05:03:04,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:04,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818940961] [2020-12-09 05:03:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:03:04,777 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:03:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:03:04,799 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:03:04,813 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 05:03:04,813 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 05:03:04,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-12-09 05:03:04,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:03:04 BoogieIcfgContainer [2020-12-09 05:03:04,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:03:04,832 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:03:04,832 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:03:04,832 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:03:04,832 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:01" (3/4) ... [2020-12-09 05:03:04,834 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 05:03:04,864 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_236292aa-4f95-4a11-8101-668e5c338774/bin/utaipan/witness.graphml [2020-12-09 05:03:04,864 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:03:04,865 INFO L168 Benchmark]: Toolchain (without parser) took 4261.88 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 79.7 MB in the beginning and 48.6 MB in the end (delta: 31.1 MB). Peak memory consumption was 55.3 MB. Max. memory is 16.1 GB. [2020-12-09 05:03:04,865 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 71.3 MB. Free memory was 37.6 MB in the beginning and 37.5 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:03:04,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.48 ms. Allocated memory is still 109.1 MB. Free memory was 79.6 MB in the beginning and 70.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 05:03:04,866 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.33 ms. Allocated memory is still 109.1 MB. Free memory was 70.4 MB in the beginning and 69.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:03:04,866 INFO L168 Benchmark]: Boogie Preprocessor took 20.40 ms. Allocated memory is still 109.1 MB. Free memory was 69.0 MB in the beginning and 68.1 MB in the end (delta: 954.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:03:04,866 INFO L168 Benchmark]: RCFGBuilder took 390.16 ms. Allocated memory is still 109.1 MB. Free memory was 67.9 MB in the beginning and 81.5 MB in the end (delta: -13.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:03:04,867 INFO L168 Benchmark]: TraceAbstraction took 3630.84 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 81.1 MB in the beginning and 50.7 MB in the end (delta: 30.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 16.1 GB. [2020-12-09 05:03:04,867 INFO L168 Benchmark]: Witness Printer took 32.04 ms. Allocated memory is still 132.1 MB. Free memory was 50.7 MB in the beginning and 48.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:03:04,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 71.3 MB. Free memory was 37.6 MB in the beginning and 37.5 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 158.48 ms. Allocated memory is still 109.1 MB. Free memory was 79.6 MB in the beginning and 70.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.33 ms. Allocated memory is still 109.1 MB. Free memory was 70.4 MB in the beginning and 69.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.40 ms. Allocated memory is still 109.1 MB. Free memory was 69.0 MB in the beginning and 68.1 MB in the end (delta: 954.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 390.16 ms. Allocated memory is still 109.1 MB. Free memory was 67.9 MB in the beginning and 81.5 MB in the end (delta: -13.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3630.84 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 81.1 MB in the beginning and 50.7 MB in the end (delta: 30.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 16.1 GB. * Witness Printer took 32.04 ms. Allocated memory is still 132.1 MB. Free memory was 50.7 MB in the beginning and 48.6 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: - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND FALSE !(i < 10) [L14] free(p) [L14] free(p) [L14] free(p) [L16] p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 97 SDslu, 40 SDs, 0 SdLazy, 174 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=9, 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, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 145 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 6593 SizeOfPredicates, 3 NumberOfNonLiveVariables, 197 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 93/255 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...