./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/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 06914024aa49a34ce88c7dcbc25f89730c27c8e4 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:02:32,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:02:32,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:02:32,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:02:32,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:02:32,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:02:32,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:02:32,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:02:32,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:02:32,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:02:32,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:02:32,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:02:32,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:02:32,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:02:32,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:02:32,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:02:32,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:02:32,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:02:32,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:02:32,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:02:32,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:02:32,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:02:32,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:02:32,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:02:32,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:02:32,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:02:32,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:02:32,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:02:32,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:02:32,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:02:32,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:02:32,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:02:32,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:02:32,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:02:32,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:02:32,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:02:32,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:02:32,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:02:32,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:02:32,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:02:32,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:02:32,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 14:02:32,275 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:02:32,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:02:32,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 14:02:32,276 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 14:02:32,277 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 14:02:32,277 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 14:02:32,277 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 14:02:32,277 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 14:02:32,277 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 14:02:32,277 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 14:02:32,278 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 14:02:32,278 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 14:02:32,278 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 14:02:32,278 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 14:02:32,278 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 14:02:32,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:02:32,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:02:32,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:02:32,280 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:02:32,280 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 14:02:32,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:02:32,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:02:32,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:02:32,280 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 14:02:32,281 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 14:02:32,281 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 14:02:32,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:02:32,281 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 14:02:32,281 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:02:32,282 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:02:32,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:02:32,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:02:32,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:02:32,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:02:32,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:02:32,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:02:32,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 14:02:32,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:02:32,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:02:32,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 14:02:32,284 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5a1e75fb-6137-4453-b8f8-4c099cb576a9/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 -> 06914024aa49a34ce88c7dcbc25f89730c27c8e4 [2019-12-07 14:02:32,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:02:32,402 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:02:32,405 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:02:32,406 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:02:32,407 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:02:32,407 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memset3.c [2019-12-07 14:02:32,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/data/f7eedfcf0/4cae57f0a00b43088678c29c2604a360/FLAG285a9b673 [2019-12-07 14:02:32,848 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:02:32,849 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/sv-benchmarks/c/ldv-memsafety/memset3.c [2019-12-07 14:02:32,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/data/f7eedfcf0/4cae57f0a00b43088678c29c2604a360/FLAG285a9b673 [2019-12-07 14:02:32,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/data/f7eedfcf0/4cae57f0a00b43088678c29c2604a360 [2019-12-07 14:02:32,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:02:32,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:02:32,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:02:32,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:02:32,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:02:32,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:02:32" (1/1) ... [2019-12-07 14:02:32,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0aafae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:32, skipping insertion in model container [2019-12-07 14:02:32,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:02:32" (1/1) ... [2019-12-07 14:02:32,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:02:32,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:02:32,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:02:32,983 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:02:33,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:02:33,060 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:02:33,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33 WrapperNode [2019-12-07 14:02:33,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:02:33,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:02:33,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:02:33,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:02:33,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:02:33,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:02:33,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:02:33,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:02:33,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... [2019-12-07 14:02:33,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:02:33,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:02:33,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:02:33,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:02:33,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/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 [2019-12-07 14:02:33,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:02:33,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:02:33,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 14:02:33,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 14:02:33,266 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:02:33,266 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 14:02:33,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:02:33 BoogieIcfgContainer [2019-12-07 14:02:33,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:02:33,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:02:33,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:02:33,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:02:33,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:02:32" (1/3) ... [2019-12-07 14:02:33,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317ad850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:02:33, skipping insertion in model container [2019-12-07 14:02:33,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:02:33" (2/3) ... [2019-12-07 14:02:33,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317ad850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:02:33, skipping insertion in model container [2019-12-07 14:02:33,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:02:33" (3/3) ... [2019-12-07 14:02:33,273 INFO L109 eAbstractionObserver]: Analyzing ICFG memset3.c [2019-12-07 14:02:33,280 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:02:33,284 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-12-07 14:02:33,292 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 14:02:33,305 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:02:33,305 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 14:02:33,305 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:02:33,305 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:02:33,305 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:02:33,305 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:02:33,305 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:02:33,306 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:02:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-12-07 14:02:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-12-07 14:02:33,318 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:02:33,319 INFO L410 BasicCegarLoop]: trace histogram [1, 1] [2019-12-07 14:02:33,319 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-12-07 14:02:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:02:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1553, now seen corresponding path program 1 times [2019-12-07 14:02:33,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:02:33,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838818388] [2019-12-07 14:02:33,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:02:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:02:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:02:33,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838818388] [2019-12-07 14:02:33,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:02:33,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 14:02:33,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719095438] [2019-12-07 14:02:33,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:02:33,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:02:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:02:33,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:02:33,443 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-12-07 14:02:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:02:33,463 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-12-07 14:02:33,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:02:33,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-12-07 14:02:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:02:33,469 INFO L225 Difference]: With dead ends: 8 [2019-12-07 14:02:33,470 INFO L226 Difference]: Without dead ends: 7 [2019-12-07 14:02:33,471 INFO L630 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 [2019-12-07 14:02:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-12-07 14:02:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-12-07 14:02:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 14:02:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-12-07 14:02:33,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 2 [2019-12-07 14:02:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:02:33,490 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-12-07 14:02:33,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:02:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-12-07 14:02:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 14:02:33,491 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:02:33,491 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 14:02:33,491 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-12-07 14:02:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:02:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash 48179, now seen corresponding path program 1 times [2019-12-07 14:02:33,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:02:33,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893405128] [2019-12-07 14:02:33,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:02:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:02:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:02:33,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893405128] [2019-12-07 14:02:33,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:02:33,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 14:02:33,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521206101] [2019-12-07 14:02:33,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:02:33,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:02:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:02:33,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:02:33,530 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 3 states. [2019-12-07 14:02:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:02:33,537 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-12-07 14:02:33,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:02:33,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 14:02:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:02:33,538 INFO L225 Difference]: With dead ends: 6 [2019-12-07 14:02:33,538 INFO L226 Difference]: Without dead ends: 6 [2019-12-07 14:02:33,538 INFO L630 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 [2019-12-07 14:02:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-12-07 14:02:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-12-07 14:02:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-12-07 14:02:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-12-07 14:02:33,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2019-12-07 14:02:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:02:33,540 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-12-07 14:02:33,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:02:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-12-07 14:02:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 14:02:33,540 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:02:33,540 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 14:02:33,540 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-12-07 14:02:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:02:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash 46301616, now seen corresponding path program 1 times [2019-12-07 14:02:33,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:02:33,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189778453] [2019-12-07 14:02:33,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:02:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:02:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:02:33,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189778453] [2019-12-07 14:02:33,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:02:33,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:02:33,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394447326] [2019-12-07 14:02:33,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:02:33,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:02:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:02:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:02:33,569 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2019-12-07 14:02:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:02:33,580 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-12-07 14:02:33,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:02:33,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 14:02:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:02:33,581 INFO L225 Difference]: With dead ends: 7 [2019-12-07 14:02:33,581 INFO L226 Difference]: Without dead ends: 7 [2019-12-07 14:02:33,581 INFO L630 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 [2019-12-07 14:02:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-12-07 14:02:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-12-07 14:02:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 14:02:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-12-07 14:02:33,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-12-07 14:02:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:02:33,583 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-12-07 14:02:33,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:02:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-12-07 14:02:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 14:02:33,583 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:02:33,583 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 14:02:33,584 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-12-07 14:02:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:02:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1435340626, now seen corresponding path program 1 times [2019-12-07 14:02:33,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:02:33,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851703467] [2019-12-07 14:02:33,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:02:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:02:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:02:33,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851703467] [2019-12-07 14:02:33,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333795113] [2019-12-07 14:02:33,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/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 [2019-12-07 14:02:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:02:33,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:02:33,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:02:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:02:33,677 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:02:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:02:33,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506149636] [2019-12-07 14:02:33,713 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 14:02:33,713 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:02:33,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:02:33,721 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:02:33,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:02:33,929 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:02:34,136 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:02:34,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:02:34,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2019-12-07 14:02:34,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919501525] [2019-12-07 14:02:34,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 14:02:34,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:02:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 14:02:34,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-07 14:02:34,138 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2019-12-07 14:02:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:02:34,175 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-12-07 14:02:34,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 14:02:34,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-12-07 14:02:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:02:34,175 INFO L225 Difference]: With dead ends: 10 [2019-12-07 14:02:34,176 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 14:02:34,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-07 14:02:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 14:02:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 14:02:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 14:02:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-12-07 14:02:34,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2019-12-07 14:02:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:02:34,178 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-12-07 14:02:34,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 14:02:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-12-07 14:02:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 14:02:34,178 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:02:34,178 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2019-12-07 14:02:34,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:02:34,379 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-12-07 14:02:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:02:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash -471213520, now seen corresponding path program 2 times [2019-12-07 14:02:34,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:02:34,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75352405] [2019-12-07 14:02:34,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:02:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:02:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:02:34,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75352405] [2019-12-07 14:02:34,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198031320] [2019-12-07 14:02:34,424 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/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 [2019-12-07 14:02:34,444 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-12-07 14:02:34,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:02:34,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:02:34,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:02:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 14:02:34,524 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:02:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 14:02:34,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:02:34,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 11 [2019-12-07 14:02:34,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121720734] [2019-12-07 14:02:34,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 14:02:34,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:02:34,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:02:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:02:34,543 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2019-12-07 14:02:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:02:34,586 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-12-07 14:02:34,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:02:34,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-07 14:02:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:02:34,587 INFO L225 Difference]: With dead ends: 9 [2019-12-07 14:02:34,587 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 14:02:34,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-12-07 14:02:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 14:02:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 14:02:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 14:02:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 14:02:34,588 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2019-12-07 14:02:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:02:34,588 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:02:34,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 14:02:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:02:34,589 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 14:02:34,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:02:34,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:02:34 BoogieIcfgContainer [2019-12-07 14:02:34,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:02:34,800 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:02:34,800 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:02:34,801 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:02:34,802 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:02:33" (3/4) ... [2019-12-07 14:02:34,809 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 14:02:34,828 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2019-12-07 14:02:34,828 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2019-12-07 14:02:34,829 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 14:02:34,862 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5a1e75fb-6137-4453-b8f8-4c099cb576a9/bin/utaipan/witness.graphml [2019-12-07 14:02:34,862 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:02:34,863 INFO L168 Benchmark]: Toolchain (without parser) took 1999.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 948.9 MB in the beginning and 923.9 MB in the end (delta: 25.0 MB). Peak memory consumption was 159.7 MB. Max. memory is 11.5 GB. [2019-12-07 14:02:34,864 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:02:34,864 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:02:34,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.47 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:02:34,865 INFO L168 Benchmark]: Boogie Preprocessor took 13.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:02:34,865 INFO L168 Benchmark]: RCFGBuilder took 170.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2019-12-07 14:02:34,866 INFO L168 Benchmark]: TraceAbstraction took 1531.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 929.3 MB in the end (delta: 177.7 MB). Peak memory consumption was 177.7 MB. Max. memory is 11.5 GB. [2019-12-07 14:02:34,867 INFO L168 Benchmark]: Witness Printer took 62.15 ms. Allocated memory is still 1.2 GB. Free memory was 929.3 MB in the beginning and 923.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:02:34,869 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 196.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.47 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 170.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1531.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 929.3 MB in the end (delta: 177.7 MB). Peak memory consumption was 177.7 MB. Max. memory is 11.5 GB. * Witness Printer took 62.15 ms. Allocated memory is still 1.2 GB. Free memory was 929.3 MB in the beginning and 923.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 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. Result: SAFE, OverallTime: 1.4s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 16 SDslu, 10 SDs, 0 SdLazy, 43 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s 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, 0.2s InterpolantComputationTime, 40 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 46 ConstructedInterpolants, 1 QuantifiedInterpolants, 2408 SizeOfPredicates, 2 NumberOfNonLiveVariables, 93 ConjunctsInSsa, 11 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...