./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memsetNonZero2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memsetNonZero2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/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 c0ea593d74670c91cacf864f376c3b9b3ea0d491 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:37:17,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:37:17,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:37:17,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:37:17,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:37:17,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:37:17,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:37:17,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:37:17,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:37:17,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:37:17,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:37:17,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:37:17,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:37:17,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:37:17,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:37:17,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:37:17,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:37:17,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:37:17,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:37:17,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:37:17,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:37:17,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:37:17,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:37:17,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:37:17,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:37:17,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:37:17,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:37:17,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:37:17,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:37:17,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:37:17,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:37:17,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:37:17,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:37:17,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:37:17,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:37:17,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:37:17,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:37:17,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:37:17,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:37:17,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:37:17,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:37:17,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:37:17,325 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:37:17,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:37:17,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:37:17,326 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:37:17,326 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:37:17,326 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:37:17,327 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:37:17,327 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:37:17,327 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:37:17,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:37:17,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:37:17,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:37:17,328 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:37:17,328 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:37:17,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:37:17,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:37:17,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:37:17,328 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:37:17,329 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:37:17,329 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:37:17,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:37:17,329 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:37:17,329 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:37:17,329 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:37:17,329 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:37:17,329 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:37:17,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:37:17,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:37:17,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:37:17,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:37:17,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:37:17,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:37:17,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:37:17,330 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:37:17,330 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:37:17,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:37:17,331 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_86387687-b80c-466f-8407-0b5db031ad48/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 -> c0ea593d74670c91cacf864f376c3b9b3ea0d491 [2019-11-26 02:37:17,468 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:37:17,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:37:17,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:37:17,482 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:37:17,482 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:37:17,489 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memsetNonZero2.c [2019-11-26 02:37:17,550 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/data/45728d63a/638d209a89a44781a4b75b8fbddaf404/FLAG3ea96a507 [2019-11-26 02:37:17,949 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:37:17,950 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/sv-benchmarks/c/ldv-memsafety/memsetNonZero2.c [2019-11-26 02:37:17,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/data/45728d63a/638d209a89a44781a4b75b8fbddaf404/FLAG3ea96a507 [2019-11-26 02:37:17,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/data/45728d63a/638d209a89a44781a4b75b8fbddaf404 [2019-11-26 02:37:17,973 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:37:17,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:37:17,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:37:17,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:37:17,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:37:17,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:37:17" (1/1) ... [2019-11-26 02:37:17,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a2d7d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:17, skipping insertion in model container [2019-11-26 02:37:17,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:37:17" (1/1) ... [2019-11-26 02:37:17,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:37:18,006 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:37:18,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:37:18,327 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:37:18,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:37:18,359 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:37:18,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18 WrapperNode [2019-11-26 02:37:18,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:37:18,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:37:18,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:37:18,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:37:18,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:37:18,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:37:18,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:37:18,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:37:18,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... [2019-11-26 02:37:18,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:37:18,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:37:18,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:37:18,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:37:18,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/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 [2019-11-26 02:37:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:37:18,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:37:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:37:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:37:18,629 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:37:18,629 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-26 02:37:18,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:37:18 BoogieIcfgContainer [2019-11-26 02:37:18,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:37:18,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:37:18,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:37:18,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:37:18,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:37:17" (1/3) ... [2019-11-26 02:37:18,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a26c6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:37:18, skipping insertion in model container [2019-11-26 02:37:18,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:18" (2/3) ... [2019-11-26 02:37:18,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a26c6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:37:18, skipping insertion in model container [2019-11-26 02:37:18,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:37:18" (3/3) ... [2019-11-26 02:37:18,642 INFO L109 eAbstractionObserver]: Analyzing ICFG memsetNonZero2.c [2019-11-26 02:37:18,655 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:37:18,660 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-26 02:37:18,670 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-26 02:37:18,699 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:37:18,700 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:37:18,700 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:37:18,700 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:37:18,700 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:37:18,700 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:37:18,700 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:37:18,701 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:37:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-26 02:37:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-26 02:37:18,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:18,745 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-26 02:37:18,745 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:37:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2019-11-26 02:37:18,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:37:18,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1114139679] [2019-11-26 02:37:18,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:18,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:37:18,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:37:18,904 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:37:18,904 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:37:18,913 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:37:18,913 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:37:18,913 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:37:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:18,930 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:37:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:18,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114139679] [2019-11-26 02:37:18,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:18,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:37:18,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076952877] [2019-11-26 02:37:18,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:37:18,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:37:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:37:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:37:18,956 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-26 02:37:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:18,992 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2019-11-26 02:37:18,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:37:18,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-11-26 02:37:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:19,000 INFO L225 Difference]: With dead ends: 11 [2019-11-26 02:37:19,001 INFO L226 Difference]: Without dead ends: 9 [2019-11-26 02:37:19,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:37:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-26 02:37:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-26 02:37:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-26 02:37:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-26 02:37:19,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2019-11-26 02:37:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:19,024 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-26 02:37:19,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:37:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-26 02:37:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:37:19,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:19,024 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:37:19,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:19,225 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:37:19,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:19,226 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2019-11-26 02:37:19,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:37:19,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1555903357] [2019-11-26 02:37:19,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:19,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:37:19,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:37:19,287 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:37:19,288 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:37:19,307 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:37:19,308 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:37:19,308 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:37:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:19,319 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:37:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:19,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1555903357] [2019-11-26 02:37:19,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:19,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-26 02:37:19,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673768592] [2019-11-26 02:37:19,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:37:19,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:37:19,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:37:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:37:19,369 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2019-11-26 02:37:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:19,388 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-11-26 02:37:19,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:37:19,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-26 02:37:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:19,389 INFO L225 Difference]: With dead ends: 8 [2019-11-26 02:37:19,389 INFO L226 Difference]: Without dead ends: 8 [2019-11-26 02:37:19,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:37:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-26 02:37:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-26 02:37:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-26 02:37:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-26 02:37:19,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2019-11-26 02:37:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:19,392 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-26 02:37:19,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:37:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-26 02:37:19,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:37:19,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:19,393 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:19,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:19,594 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:37:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:19,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1803953449, now seen corresponding path program 1 times [2019-11-26 02:37:19,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:37:19,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1305530820] [2019-11-26 02:37:19,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:19,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:37:19,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:37:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:19,677 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:37:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:19,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1305530820] [2019-11-26 02:37:19,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:19,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-26 02:37:19,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234262023] [2019-11-26 02:37:19,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:37:19,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:37:19,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:37:19,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:37:19,705 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-11-26 02:37:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:19,760 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-11-26 02:37:19,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:37:19,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-26 02:37:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:19,761 INFO L225 Difference]: With dead ends: 10 [2019-11-26 02:37:19,761 INFO L226 Difference]: Without dead ends: 10 [2019-11-26 02:37:19,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:37:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-26 02:37:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-26 02:37:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-26 02:37:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-26 02:37:19,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2019-11-26 02:37:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:19,765 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-26 02:37:19,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:37:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-26 02:37:19,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:37:19,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:19,766 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:19,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:19,966 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:37:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:19,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1569492695, now seen corresponding path program 1 times [2019-11-26 02:37:19,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:37:19,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1420064217] [2019-11-26 02:37:19,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:20,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:37:20,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:37:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:20,087 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:37:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:20,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1420064217] [2019-11-26 02:37:20,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394610526] [2019-11-26 02:37:20,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:37:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:20,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:37:20,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:37:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:20,226 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:37:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:20,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:37:20,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6] total 10 [2019-11-26 02:37:20,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100490427] [2019-11-26 02:37:20,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:37:20,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:37:20,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:37:20,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:37:20,231 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2019-11-26 02:37:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:20,372 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-26 02:37:20,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:37:20,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-11-26 02:37:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:20,374 INFO L225 Difference]: With dead ends: 14 [2019-11-26 02:37:20,374 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:37:20,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:37:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:37:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:37:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:37:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-26 02:37:20,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2019-11-26 02:37:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:20,377 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-26 02:37:20,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:37:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-26 02:37:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:37:20,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:20,378 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:20,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:37:20,780 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:37:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash -89847511, now seen corresponding path program 2 times [2019-11-26 02:37:20,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:37:20,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1054137953] [2019-11-26 02:37:20,782 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:20,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-26 02:37:20,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:37:20,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:37:20,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:37:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:37:20,878 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:37:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:37:22,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054137953] [2019-11-26 02:37:22,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:22,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-26 02:37:22,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072539657] [2019-11-26 02:37:22,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:37:22,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:37:22,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:37:22,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2019-11-26 02:37:22,914 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-11-26 02:37:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:22,947 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-26 02:37:22,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:37:22,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-26 02:37:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:22,948 INFO L225 Difference]: With dead ends: 13 [2019-11-26 02:37:22,948 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:37:22,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2019-11-26 02:37:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:37:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:37:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:37:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:37:22,949 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2019-11-26 02:37:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:22,949 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:37:22,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:37:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:37:22,950 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:37:23,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:37:23,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:37:23 BoogieIcfgContainer [2019-11-26 02:37:23,155 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:37:23,155 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:37:23,155 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:37:23,155 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:37:23,156 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:37:18" (3/4) ... [2019-11-26 02:37:23,162 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:37:23,171 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2019-11-26 02:37:23,172 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-26 02:37:23,172 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-26 02:37:23,172 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:37:23,217 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_86387687-b80c-466f-8407-0b5db031ad48/bin/utaipan/witness.graphml [2019-11-26 02:37:23,217 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:37:23,218 INFO L168 Benchmark]: Toolchain (without parser) took 5243.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.8 MB in the beginning and 999.2 MB in the end (delta: -54.4 MB). Peak memory consumption was 88.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:23,219 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:37:23,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:23,219 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.32 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. [2019-11-26 02:37:23,220 INFO L168 Benchmark]: Boogie Preprocessor took 19.41 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. [2019-11-26 02:37:23,220 INFO L168 Benchmark]: RCFGBuilder took 220.06 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:23,221 INFO L168 Benchmark]: TraceAbstraction took 4523.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 999.2 MB in the end (delta: 120.0 MB). Peak memory consumption was 120.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:23,221 INFO L168 Benchmark]: Witness Printer took 61.82 ms. Allocated memory is still 1.2 GB. Free memory is still 999.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:37:23,223 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 382.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.32 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 19.41 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 220.06 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4523.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 999.2 MB in the end (delta: 120.0 MB). Peak memory consumption was 120.0 MB. Max. memory is 11.5 GB. * Witness Printer took 61.82 ms. Allocated memory is still 1.2 GB. Free memory is still 999.2 MB. There was no memory consumed. 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: 20]: 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, 12 locations, 3 error locations. Result: SAFE, OverallTime: 4.4s, OverallIterations: 5, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 25 SDslu, 29 SDs, 0 SdLazy, 58 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 45 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 1 QuantifiedInterpolants, 3638 SizeOfPredicates, 12 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 42/54 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...