./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memset3.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_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI --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 06914024aa49a34ce88c7dcbc25f89730c27c8e4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:33:01,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:33:01,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:33:01,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:33:01,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:33:01,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:33:01,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:33:01,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:33:01,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:33:01,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:33:01,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:33:01,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:33:01,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:33:01,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:33:01,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:33:01,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:33:01,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:33:01,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:33:01,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:33:01,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:33:01,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:33:01,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:33:01,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:33:01,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:33:01,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:33:01,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:33:01,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:33:01,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:33:01,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:33:01,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:33:01,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:33:01,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:33:01,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:33:01,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:33:01,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:33:01,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:33:01,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:33:01,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:33:01,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:33:01,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:33:01,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:33:01,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:33:01,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:33:01,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:33:01,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:33:01,357 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:33:01,358 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:33:01,358 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:33:01,358 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:33:01,358 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:33:01,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:33:01,359 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:33:01,359 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:33:01,359 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:33:01,359 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:33:01,360 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:33:01,360 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:33:01,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:33:01,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:33:01,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:33:01,361 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:33:01,361 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:33:01,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:33:01,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:33:01,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:33:01,362 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:33:01,363 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:33:01,363 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:33:01,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:33:01,363 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:33:01,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:33:01,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:33:01,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:33:01,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:33:01,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:01,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:33:01,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:33:01,365 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:33:01,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:33:01,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:33:01,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:33:01,366 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_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06914024aa49a34ce88c7dcbc25f89730c27c8e4 [2021-10-11 02:33:01,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:33:01,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:33:01,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:33:01,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:33:01,704 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:33:01,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-memsafety/memset3.c [2021-10-11 02:33:01,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/data/1dd948f69/e5d2d230b67341279d74a4822b4f3cf1/FLAGdecfa2228 [2021-10-11 02:33:02,252 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:33:02,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/sv-benchmarks/c/ldv-memsafety/memset3.c [2021-10-11 02:33:02,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/data/1dd948f69/e5d2d230b67341279d74a4822b4f3cf1/FLAGdecfa2228 [2021-10-11 02:33:02,647 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/data/1dd948f69/e5d2d230b67341279d74a4822b4f3cf1 [2021-10-11 02:33:02,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:33:02,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:33:02,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:02,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:33:02,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:33:02,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66c2cc71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02, skipping insertion in model container [2021-10-11 02:33:02,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:33:02,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:02,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:02,834 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:33:02,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:02,893 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:33:02,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02 WrapperNode [2021-10-11 02:33:02,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:02,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:02,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:33:02,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:33:02,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:02,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:33:02,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:33:02,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:33:02,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... [2021-10-11 02:33:02,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:33:02,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:33:02,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:33:02,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:33:02,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:33:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:33:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:33:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:33:03,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:33:03,385 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 02:33:03,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:03 BoogieIcfgContainer [2021-10-11 02:33:03,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:33:03,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:33:03,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:33:03,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:33:03,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:33:02" (1/3) ... [2021-10-11 02:33:03,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8bb85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:03, skipping insertion in model container [2021-10-11 02:33:03,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:02" (2/3) ... [2021-10-11 02:33:03,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8bb85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:03, skipping insertion in model container [2021-10-11 02:33:03,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:03" (3/3) ... [2021-10-11 02:33:03,409 INFO L111 eAbstractionObserver]: Analyzing ICFG memset3.c [2021-10-11 02:33:03,424 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:33:03,427 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-10-11 02:33:03,439 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-11 02:33:03,467 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:33:03,468 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:33:03,468 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:33:03,468 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:33:03,468 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:33:03,469 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:33:03,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:33:03,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:33:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2021-10-11 02:33:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-11 02:33:03,487 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:03,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2021-10-11 02:33:03,489 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2021-10-11 02:33:03,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:03,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1553, now seen corresponding path program 1 times [2021-10-11 02:33:03,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:03,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693260909] [2021-10-11 02:33:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:03,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693260909] [2021-10-11 02:33:03,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:03,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:33:03,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646148056] [2021-10-11 02:33:03,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:33:03,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:03,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:33:03,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:33:03,714 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2021-10-11 02:33:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:03,747 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2021-10-11 02:33:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:33:03,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2021-10-11 02:33:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:03,757 INFO L225 Difference]: With dead ends: 8 [2021-10-11 02:33:03,757 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:33:03,759 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 [2021-10-11 02:33:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:33:03,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:33:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:33:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-11 02:33:03,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 2 [2021-10-11 02:33:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:03,797 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-11 02:33:03,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:33:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-11 02:33:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:33:03,798 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:03,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:33:03,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:33:03,799 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2021-10-11 02:33:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 48179, now seen corresponding path program 1 times [2021-10-11 02:33:03,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:03,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544772299] [2021-10-11 02:33:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:03,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544772299] [2021-10-11 02:33:03,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:03,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:33:03,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613293995] [2021-10-11 02:33:03,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:33:03,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:03,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:33:03,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:33:03,886 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 3 states. [2021-10-11 02:33:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:03,899 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2021-10-11 02:33:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:33:03,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:33:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:03,900 INFO L225 Difference]: With dead ends: 6 [2021-10-11 02:33:03,901 INFO L226 Difference]: Without dead ends: 6 [2021-10-11 02:33:03,901 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 [2021-10-11 02:33:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-11 02:33:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-11 02:33:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-11 02:33:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-11 02:33:03,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2021-10-11 02:33:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:03,904 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-11 02:33:03,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:33:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-11 02:33:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:33:03,905 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:03,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:33:03,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:33:03,906 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2021-10-11 02:33:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 46301616, now seen corresponding path program 1 times [2021-10-11 02:33:03,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:03,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433202974] [2021-10-11 02:33:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:03,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433202974] [2021-10-11 02:33:03,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:03,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:33:03,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452538767] [2021-10-11 02:33:03,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:03,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:03,962 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2021-10-11 02:33:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:03,981 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2021-10-11 02:33:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:03,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-10-11 02:33:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:03,983 INFO L225 Difference]: With dead ends: 7 [2021-10-11 02:33:03,984 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:33:03,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:33:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:33:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:33:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-11 02:33:03,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-11 02:33:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:03,988 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-11 02:33:03,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-11 02:33:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:33:03,989 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:03,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:33:03,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:33:03,989 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2021-10-11 02:33:03,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:03,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1435340626, now seen corresponding path program 1 times [2021-10-11 02:33:03,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:03,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843472274] [2021-10-11 02:33:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:04,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843472274] [2021-10-11 02:33:04,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16137515] [2021-10-11 02:33:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:33:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:04,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:04,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235736158] [2021-10-11 02:33:04,280 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:33:04,280 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:04,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:04,292 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:04,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:04,730 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:05,007 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-10-11 02:33:05,040 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:05,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:05,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2021-10-11 02:33:05,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094029884] [2021-10-11 02:33:05,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:33:05,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:33:05,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:33:05,046 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2021-10-11 02:33:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:05,106 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-10-11 02:33:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:33:05,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2021-10-11 02:33:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:05,107 INFO L225 Difference]: With dead ends: 10 [2021-10-11 02:33:05,108 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:33:05,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:33:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:33:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:33:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:33:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-11 02:33:05,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2021-10-11 02:33:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:05,112 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-11 02:33:05,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:33:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-11 02:33:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:33:05,115 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:05,115 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-10-11 02:33:05,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-11 02:33:05,327 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2021-10-11 02:33:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -471213520, now seen corresponding path program 2 times [2021-10-11 02:33:05,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:05,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119452687] [2021-10-11 02:33:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:05,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119452687] [2021-10-11 02:33:05,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088263541] [2021-10-11 02:33:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:05,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:33:05,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:33:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-11 02:33:05,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-11 02:33:05,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:33:05,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 11 [2021-10-11 02:33:05,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613107258] [2021-10-11 02:33:05,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:33:05,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:05,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:33:05,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:33:05,574 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2021-10-11 02:33:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:05,595 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-10-11 02:33:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:05,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-10-11 02:33:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:05,596 INFO L225 Difference]: With dead ends: 9 [2021-10-11 02:33:05,596 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:33:05,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:33:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:33:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:33:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:33:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:33:05,600 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-10-11 02:33:05,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:05,600 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:33:05,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:33:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:33:05,601 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:33:05,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-11 02:33:05,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:05 BoogieIcfgContainer [2021-10-11 02:33:05,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:05,819 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:05,819 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:05,819 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:05,819 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:03" (3/4) ... [2021-10-11 02:33:05,823 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:33:05,832 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-11 02:33:05,833 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:33:05,833 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 02:33:05,860 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba304be2-4f33-40d6-9732-729aacf6baff/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:33:05,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:05,861 INFO L168 Benchmark]: Toolchain (without parser) took 3210.01 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 58.0 MB in the beginning and 102.3 MB in the end (delta: -44.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:05,862 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 62.9 MB in the beginning and 62.9 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:05,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.20 ms. Allocated memory is still 92.3 MB. Free memory was 57.8 MB in the beginning and 69.9 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:05,863 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.72 ms. Allocated memory is still 92.3 MB. Free memory was 69.9 MB in the beginning and 68.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:05,864 INFO L168 Benchmark]: Boogie Preprocessor took 18.21 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.6 MB in the end (delta: 829.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:05,865 INFO L168 Benchmark]: RCFGBuilder took 434.13 ms. Allocated memory is still 92.3 MB. Free memory was 67.6 MB in the beginning and 54.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:05,865 INFO L168 Benchmark]: TraceAbstraction took 2428.92 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 54.2 MB in the beginning and 104.2 MB in the end (delta: -50.0 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:05,866 INFO L168 Benchmark]: Witness Printer took 41.50 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 102.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:05,870 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 62.9 MB in the beginning and 62.9 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 243.20 ms. Allocated memory is still 92.3 MB. Free memory was 57.8 MB in the beginning and 69.9 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.72 ms. Allocated memory is still 92.3 MB. Free memory was 69.9 MB in the beginning and 68.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.21 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.6 MB in the end (delta: 829.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 434.13 ms. Allocated memory is still 92.3 MB. Free memory was 67.6 MB in the beginning and 54.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2428.92 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 54.2 MB in the beginning and 104.2 MB in the end (delta: -50.0 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * Witness Printer took 41.50 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 102.3 MB in the end (delta: 1.9 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: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: 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 1 procedures, 9 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 16 SDslu, 8 SDs, 0 SdLazy, 39 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=4, 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, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 40 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 46 ConstructedInterpolants, 1 QuantifiedInterpolants, 2206 SizeOfPredicates, 4 NumberOfNonLiveVariables, 93 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 20/33 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...