./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i --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_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/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 cf7af2f20e563d03f4a81a8dac054ded849cb34c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:21:55,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:21:55,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:21:55,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:21:55,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:21:55,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:21:55,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:21:55,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:21:55,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:21:55,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:21:55,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:21:55,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:21:55,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:21:55,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:21:55,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:21:55,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:21:55,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:21:55,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:21:55,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:21:55,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:21:55,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:21:55,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:21:55,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:21:55,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:21:55,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:21:55,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:21:55,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:21:55,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:21:55,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:21:55,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:21:55,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:21:55,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:21:55,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:21:55,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:21:55,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:21:55,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:21:55,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:21:55,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:21:55,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:21:55,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:21:55,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:21:55,222 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:21:55,242 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:21:55,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:21:55,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:21:55,244 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:21:55,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:21:55,244 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:21:55,244 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:21:55,244 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:21:55,245 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:21:55,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:21:55,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:21:55,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:21:55,247 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:21:55,247 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:21:55,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:21:55,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:21:55,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:21:55,248 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:21:55,248 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:21:55,248 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:21:55,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:21:55,248 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:21:55,248 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:21:55,249 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:21:55,249 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:21:55,249 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:21:55,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:21:55,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:21:55,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:21:55,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:21:55,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:21:55,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:21:55,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:21:55,250 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:21:55,251 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:21:55,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:21:55,251 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_be85d6e8-14be-4931-be2f-486e5d2ad03b/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 -> cf7af2f20e563d03f4a81a8dac054ded849cb34c [2019-11-26 02:21:55,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:21:55,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:21:55,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:21:55,450 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:21:55,450 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:21:55,451 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i [2019-11-26 02:21:55,508 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/data/68fe5ac9c/5722e65d240d41d59a70f5e39b7a55a3/FLAG757c52fef [2019-11-26 02:21:55,994 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:21:55,995 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i [2019-11-26 02:21:56,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/data/68fe5ac9c/5722e65d240d41d59a70f5e39b7a55a3/FLAG757c52fef [2019-11-26 02:21:56,329 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/data/68fe5ac9c/5722e65d240d41d59a70f5e39b7a55a3 [2019-11-26 02:21:56,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:21:56,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:21:56,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:21:56,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:21:56,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:21:56,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24acfad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56, skipping insertion in model container [2019-11-26 02:21:56,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:21:56,391 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:21:56,716 INFO L965 CHandler]: Found a cast between two array/pointer types where the value type is smaller than the cast-to type, and where that value type is smaller than our current memory model resolution [2019-11-26 02:21:56,716 INFO L968 CHandler]: at location: C: (struct node*) malloc(sizeof(struct node)) [562] [2019-11-26 02:21:56,717 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:21:56,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:21:56,734 INFO L198 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2019-11-26 02:21:56,740 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:21:56,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:21:56,774 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:21:56,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:21:56,881 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:21:56,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56 WrapperNode [2019-11-26 02:21:56,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:21:56,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:21:56,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:21:56,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:21:56,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:21:56,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:21:56,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:21:56,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:21:56,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... [2019-11-26 02:21:56,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:21:57,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:21:57,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:21:57,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:21:57,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/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 02:21:57,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:21:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:21:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:21:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:21:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:21:57,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:21:57,513 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:21:57,515 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-26 02:21:57,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:21:57 BoogieIcfgContainer [2019-11-26 02:21:57,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:21:57,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:21:57,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:21:57,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:21:57,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:21:56" (1/3) ... [2019-11-26 02:21:57,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1647c63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:21:57, skipping insertion in model container [2019-11-26 02:21:57,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:21:56" (2/3) ... [2019-11-26 02:21:57,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1647c63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:21:57, skipping insertion in model container [2019-11-26 02:21:57,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:21:57" (3/3) ... [2019-11-26 02:21:57,526 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy-2.i [2019-11-26 02:21:57,535 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:21:57,543 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2019-11-26 02:21:57,554 INFO L249 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2019-11-26 02:21:57,576 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:21:57,577 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:21:57,577 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:21:57,577 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:21:57,577 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:21:57,577 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:21:57,577 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:21:57,578 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:21:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-26 02:21:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:21:57,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:21:57,603 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:21:57,603 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:21:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:21:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2097131947, now seen corresponding path program 1 times [2019-11-26 02:21:57,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:21:57,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [664916693] [2019-11-26 02:21:57,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/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 02:21:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:21:57,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:21:57,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:21:57,809 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 02:21:57,809 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:21:57,820 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:21:57,821 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:21:57,821 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:21:57,874 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:21:57,874 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-26 02:21:57,877 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:21:57,935 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-26 02:21:57,936 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:21:57,936 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-26 02:21:57,978 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 02:21:57,978 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:21:57,999 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 02:21:58,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [664916693] [2019-11-26 02:21:58,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:21:58,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:21:58,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173176957] [2019-11-26 02:21:58,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:21:58,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:21:58,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:21:58,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:21:58,024 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2019-11-26 02:21:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:21:58,207 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-26 02:21:58,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:21:58,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-26 02:21:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:21:58,215 INFO L225 Difference]: With dead ends: 30 [2019-11-26 02:21:58,215 INFO L226 Difference]: Without dead ends: 26 [2019-11-26 02:21:58,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:21:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-26 02:21:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-26 02:21:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-26 02:21:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 25 transitions. [2019-11-26 02:21:58,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 25 transitions. Word has length 9 [2019-11-26 02:21:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:21:58,242 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 25 transitions. [2019-11-26 02:21:58,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:21:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 25 transitions. [2019-11-26 02:21:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:21:58,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:21:58,243 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:21:58,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:21:58,447 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:21:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:21:58,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2097131948, now seen corresponding path program 1 times [2019-11-26 02:21:58,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:21:58,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1843444527] [2019-11-26 02:21:58,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/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 02:21:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:21:58,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:21:58,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:21:58,553 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 02:21:58,553 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:21:58,570 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:21:58,577 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 02:21:58,577 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:21:58,591 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:21:58,591 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:21:58,592 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-26 02:21:58,658 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:21:58,658 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-11-26 02:21:58,659 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:21:58,675 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:21:58,680 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2019-11-26 02:21:58,681 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:21:58,694 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:21:58,694 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:21:58,695 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:20 [2019-11-26 02:21:58,728 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 02:21:58,729 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:21:58,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-26 02:21:59,046 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 02:21:59,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843444527] [2019-11-26 02:21:59,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:21:59,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-26 02:21:59,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038808237] [2019-11-26 02:21:59,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:21:59,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:21:59,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:21:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:21:59,050 INFO L87 Difference]: Start difference. First operand 26 states and 25 transitions. Second operand 8 states. [2019-11-26 02:21:59,583 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-11-26 02:21:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:21:59,618 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2019-11-26 02:21:59,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:21:59,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-11-26 02:21:59,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:21:59,621 INFO L225 Difference]: With dead ends: 22 [2019-11-26 02:21:59,622 INFO L226 Difference]: Without dead ends: 22 [2019-11-26 02:21:59,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:21:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-26 02:21:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-26 02:21:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 02:21:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2019-11-26 02:21:59,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 9 [2019-11-26 02:21:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:21:59,632 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2019-11-26 02:21:59,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:21:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2019-11-26 02:21:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:21:59,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:21:59,633 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:21:59,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:21:59,837 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:21:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:21:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1063541525, now seen corresponding path program 1 times [2019-11-26 02:21:59,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:21:59,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1623939981] [2019-11-26 02:21:59,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/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 02:21:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:21:59,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 02:21:59,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:21:59,982 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 02:21:59,983 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:21:59,988 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:21:59,988 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:21:59,988 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:22:00,029 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-26 02:22:00,030 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:22:00,042 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:22:00,045 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-26 02:22:00,046 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:22:00,055 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:22:00,056 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:22:00,056 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:17 [2019-11-26 02:22:00,090 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-26 02:22:00,091 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:22:00,102 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:22:00,105 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-26 02:22:00,105 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:22:00,110 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:22:00,111 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:22:00,111 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:9 [2019-11-26 02:22:00,137 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 02:22:00,138 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:22:00,400 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 02:22:00,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623939981] [2019-11-26 02:22:00,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:22:00,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-26 02:22:00,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853719947] [2019-11-26 02:22:00,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-26 02:22:00,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:22:00,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-26 02:22:00,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:22:00,402 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand 12 states. [2019-11-26 02:22:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:22:00,852 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2019-11-26 02:22:00,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:22:00,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2019-11-26 02:22:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:22:00,854 INFO L225 Difference]: With dead ends: 21 [2019-11-26 02:22:00,854 INFO L226 Difference]: Without dead ends: 21 [2019-11-26 02:22:00,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:22:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-26 02:22:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-26 02:22:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-26 02:22:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2019-11-26 02:22:00,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 12 [2019-11-26 02:22:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:22:00,858 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2019-11-26 02:22:00,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-26 02:22:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2019-11-26 02:22:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:22:00,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:22:00,859 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:22:01,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:22:01,062 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:22:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:22:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1063541524, now seen corresponding path program 1 times [2019-11-26 02:22:01,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:22:01,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1816129694] [2019-11-26 02:22:01,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/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 02:22:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:22:01,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:22:01,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:22:01,156 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 02:22:01,157 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:22:01,159 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:22:01,159 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:22:01,159 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:22:01,185 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-26 02:22:01,186 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:22:01,193 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:22:01,194 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:22:01,194 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:11 [2019-11-26 02:22:01,211 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2019-11-26 02:22:01,211 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:22:01,217 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:22:01,218 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:22:01,218 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:11 [2019-11-26 02:22:01,245 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 02:22:01,245 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:22:01,327 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 02:22:01,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816129694] [2019-11-26 02:22:01,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:22:01,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-11-26 02:22:01,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715790918] [2019-11-26 02:22:01,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:22:01,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:22:01,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:22:01,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:22:01,330 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 11 states. [2019-11-26 02:22:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:22:01,542 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2019-11-26 02:22:01,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:22:01,543 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2019-11-26 02:22:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:22:01,543 INFO L225 Difference]: With dead ends: 20 [2019-11-26 02:22:01,543 INFO L226 Difference]: Without dead ends: 20 [2019-11-26 02:22:01,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:22:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-26 02:22:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-26 02:22:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:22:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2019-11-26 02:22:01,546 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 12 [2019-11-26 02:22:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:22:01,546 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2019-11-26 02:22:01,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:22:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2019-11-26 02:22:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:22:01,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:22:01,547 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:22:01,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:22:01,749 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:22:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:22:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -254138953, now seen corresponding path program 1 times [2019-11-26 02:22:01,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:22:01,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [856198438] [2019-11-26 02:22:01,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:22:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:22:01,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:22:01,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:22:01,895 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 02:22:01,895 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:22:01,933 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 02:22:01,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [856198438] [2019-11-26 02:22:01,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:22:01,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2019-11-26 02:22:01,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382010532] [2019-11-26 02:22:01,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:22:01,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:22:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:22:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:22:01,935 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand 9 states. [2019-11-26 02:22:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:22:02,029 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2019-11-26 02:22:02,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:22:02,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-26 02:22:02,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:22:02,030 INFO L225 Difference]: With dead ends: 19 [2019-11-26 02:22:02,030 INFO L226 Difference]: Without dead ends: 19 [2019-11-26 02:22:02,031 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:22:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-26 02:22:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-26 02:22:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-26 02:22:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2019-11-26 02:22:02,033 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 16 [2019-11-26 02:22:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:22:02,034 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2019-11-26 02:22:02,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:22:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2019-11-26 02:22:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-26 02:22:02,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:22:02,035 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:22:02,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:22:02,236 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:22:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:22:02,236 INFO L82 PathProgramCache]: Analyzing trace with hash 585604346, now seen corresponding path program 1 times [2019-11-26 02:22:02,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:22:02,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1368876222] [2019-11-26 02:22:02,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be85d6e8-14be-4931-be2f-486e5d2ad03b/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 02:22:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:22:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:22:02,471 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:22:02,471 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:22:02,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:22:02,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:22:02 BoogieIcfgContainer [2019-11-26 02:22:02,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:22:02,697 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:22:02,697 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:22:02,697 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:22:02,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:21:57" (3/4) ... [2019-11-26 02:22:02,703 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-26 02:22:02,703 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:22:02,709 INFO L168 Benchmark]: Toolchain (without parser) took 6372.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 190.8 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -221.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:22:02,710 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:22:02,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 549.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -134.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:22:02,712 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:22:02,712 INFO L168 Benchmark]: Boogie Preprocessor took 68.22 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:22:02,713 INFO L168 Benchmark]: RCFGBuilder took 511.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:22:02,713 INFO L168 Benchmark]: TraceAbstraction took 5180.28 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 79.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -115.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:22:02,713 INFO L168 Benchmark]: Witness Printer took 5.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:22:02,716 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 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 549.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -134.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 68.22 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 511.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5180.28 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 79.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -115.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 5.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 568]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 568. Possible FailurePath: [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); [L563] COND FALSE !(((void *)0) == temp) [L566] return temp; [L569] struct node* s = alloc_node(); [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); [L563] COND FALSE !(((void *)0) == temp) [L566] return temp; [L570] s->next = alloc_node() [L571] EXPR s->next [L571] *s = *(s->next) [L572] free(s) [L572] free(s) [L572] free(s) [L573] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 12 error locations. Result: UNSAFE, OverallTime: 5.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 270 SDslu, 54 SDs, 0 SdLazy, 247 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 106 ConstructedInterpolants, 11 QuantifiedInterpolants, 9929 SizeOfPredicates, 39 NumberOfNonLiveVariables, 228 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...