./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-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_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 17ff5ae56efea2deac29e7fa779d53a24810a7c7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:55:30,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:55:30,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:55:30,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:55:30,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:55:30,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:55:30,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:55:30,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:55:30,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:55:30,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:55:30,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:55:30,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:55:30,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:55:30,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:55:30,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:55:30,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:55:30,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:55:30,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:55:30,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:55:30,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:55:30,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:55:30,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:55:30,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:55:30,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:55:30,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:55:30,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:55:30,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:55:30,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:55:30,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:55:30,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:55:30,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:55:30,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:55:30,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:55:30,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:55:30,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:55:30,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:55:30,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:55:30,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:55:30,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:55:30,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:55:30,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:55:30,500 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:55:30,513 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:55:30,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:55:30,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:55:30,514 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:55:30,514 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:55:30,514 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:55:30,514 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:55:30,514 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:55:30,514 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:55:30,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:55:30,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:55:30,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:55:30,516 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:55:30,516 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:55:30,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:55:30,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:55:30,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:55:30,516 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:55:30,517 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:55:30,517 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:55:30,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:55:30,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:55:30,517 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:55:30,518 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:55:30,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:55:30,518 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:55:30,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:55:30,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:55:30,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:55:30,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:55:30,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:55:30,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:55:30,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:55:30,519 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:55:30,520 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:55:30,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:55:30,520 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_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 -> 17ff5ae56efea2deac29e7fa779d53a24810a7c7 [2019-11-26 02:55:30,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:55:30,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:55:30,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:55:30,669 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:55:30,669 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:55:30,670 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/../../sv-benchmarks/c/list-properties/simple-2.i [2019-11-26 02:55:30,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/data/ad188caed/5e87bfa3c1974771a488911ca7814087/FLAG57f33e3bd [2019-11-26 02:55:31,132 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:55:31,133 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/sv-benchmarks/c/list-properties/simple-2.i [2019-11-26 02:55:31,145 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/data/ad188caed/5e87bfa3c1974771a488911ca7814087/FLAG57f33e3bd [2019-11-26 02:55:31,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/data/ad188caed/5e87bfa3c1974771a488911ca7814087 [2019-11-26 02:55:31,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:55:31,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:55:31,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:55:31,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:55:31,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:55:31,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c5be6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31, skipping insertion in model container [2019-11-26 02:55:31,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:55:31,218 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:55:31,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:55:31,612 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:55:31,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:55:31,719 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:55:31,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31 WrapperNode [2019-11-26 02:55:31,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:55:31,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:55:31,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:55:31,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:55:31,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:55:31,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:55:31,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:55:31,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:55:31,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... [2019-11-26 02:55:31,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:55:31,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:55:31,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:55:31,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:55:31,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 02:55:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:55:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:55:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:55:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:55:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:55:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:55:31,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:55:32,242 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:55:32,243 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-26 02:55:32,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:32 BoogieIcfgContainer [2019-11-26 02:55:32,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:55:32,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:55:32,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:55:32,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:55:32,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:55:31" (1/3) ... [2019-11-26 02:55:32,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14aa10e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:55:32, skipping insertion in model container [2019-11-26 02:55:32,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:31" (2/3) ... [2019-11-26 02:55:32,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14aa10e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:55:32, skipping insertion in model container [2019-11-26 02:55:32,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:32" (3/3) ... [2019-11-26 02:55:32,250 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-2.i [2019-11-26 02:55:32,260 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:55:32,266 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2019-11-26 02:55:32,277 INFO L249 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2019-11-26 02:55:32,296 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:55:32,296 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:55:32,297 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:55:32,297 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:55:32,297 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:55:32,297 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:55:32,297 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:55:32,298 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:55:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-26 02:55:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:55:32,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:32,319 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:55:32,319 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-11-26 02:55:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash 889599230, now seen corresponding path program 1 times [2019-11-26 02:55:32,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:32,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1156986788] [2019-11-26 02:55:32,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 02:55:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:32,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:55:32,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:32,502 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 02:55:32,502 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:32,510 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:32,510 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:55:32,510 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:55:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:32,529 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:32,541 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 02:55:32,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1156986788] [2019-11-26 02:55:32,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:32,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-26 02:55:32,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898812578] [2019-11-26 02:55:32,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:55:32,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:32,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:55:32,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:55:32,571 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2019-11-26 02:55:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:32,779 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-11-26 02:55:32,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:55:32,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:55:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:32,793 INFO L225 Difference]: With dead ends: 50 [2019-11-26 02:55:32,793 INFO L226 Difference]: Without dead ends: 43 [2019-11-26 02:55:32,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:55:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-26 02:55:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2019-11-26 02:55:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-26 02:55:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-11-26 02:55:32,835 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 6 [2019-11-26 02:55:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:32,836 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-11-26 02:55:32,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:55:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-11-26 02:55:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:55:32,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:32,837 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:55:33,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:33,044 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-11-26 02:55:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash 889599231, now seen corresponding path program 1 times [2019-11-26 02:55:33,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:33,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [772953855] [2019-11-26 02:55:33,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 02:55:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:33,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:55:33,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:33,131 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 02:55:33,132 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:33,143 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:33,143 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:55:33,144 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:55:33,171 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 02:55:33,171 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:33,255 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 02:55:33,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772953855] [2019-11-26 02:55:33,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:33,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-26 02:55:33,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871924087] [2019-11-26 02:55:33,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:55:33,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:55:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:55:33,258 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2019-11-26 02:55:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:33,665 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-26 02:55:33,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:55:33,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-26 02:55:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:33,668 INFO L225 Difference]: With dead ends: 50 [2019-11-26 02:55:33,668 INFO L226 Difference]: Without dead ends: 50 [2019-11-26 02:55:33,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:55:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-26 02:55:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2019-11-26 02:55:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-26 02:55:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-26 02:55:33,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 6 [2019-11-26 02:55:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:33,674 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-26 02:55:33,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:55:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-26 02:55:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:55:33,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:33,675 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:33,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:33,879 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-11-26 02:55:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1828101336, now seen corresponding path program 1 times [2019-11-26 02:55:33,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:33,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1178486757] [2019-11-26 02:55:33,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 02:55:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:33,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:55:33,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:33,969 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 02:55:33,970 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:33,973 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 02:55:33,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1178486757] [2019-11-26 02:55:33,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:33,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:55:33,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79567043] [2019-11-26 02:55:33,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:55:33,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:55:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:55:33,975 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 4 states. [2019-11-26 02:55:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:34,149 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-26 02:55:34,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:55:34,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-26 02:55:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:34,151 INFO L225 Difference]: With dead ends: 47 [2019-11-26 02:55:34,151 INFO L226 Difference]: Without dead ends: 47 [2019-11-26 02:55:34,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:55:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-26 02:55:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-26 02:55:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-26 02:55:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-11-26 02:55:34,156 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 11 [2019-11-26 02:55:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:34,156 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-11-26 02:55:34,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:55:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-11-26 02:55:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:55:34,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:34,157 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:34,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:34,358 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-11-26 02:55:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash 903973711, now seen corresponding path program 1 times [2019-11-26 02:55:34,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:34,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1469185149] [2019-11-26 02:55:34,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 02:55:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:34,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:55:34,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:34,477 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:34,478 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 02:55:34,480 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:34,504 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-26 02:55:34,505 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:55:34,505 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:11 [2019-11-26 02:55:34,531 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 13 treesize of output 9 [2019-11-26 02:55:34,531 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:34,545 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:34,546 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 02:55:34,546 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2019-11-26 02:55:34,580 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 23 treesize of output 11 [2019-11-26 02:55:34,581 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:34,587 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:34,588 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 02:55:34,588 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:13 [2019-11-26 02:55:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:34,605 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:34,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1469185149] [2019-11-26 02:55:34,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:34,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-26 02:55:34,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315428232] [2019-11-26 02:55:34,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:55:34,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:34,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:55:34,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:55:34,663 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 8 states. [2019-11-26 02:55:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:35,033 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-26 02:55:35,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:55:35,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-26 02:55:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:35,035 INFO L225 Difference]: With dead ends: 58 [2019-11-26 02:55:35,035 INFO L226 Difference]: Without dead ends: 58 [2019-11-26 02:55:35,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:55:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-26 02:55:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2019-11-26 02:55:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-26 02:55:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-26 02:55:35,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 13 [2019-11-26 02:55:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:35,043 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-26 02:55:35,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:55:35,043 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-26 02:55:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:55:35,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:35,044 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:35,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:35,246 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-11-26 02:55:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash 903973712, now seen corresponding path program 1 times [2019-11-26 02:55:35,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:35,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1508262984] [2019-11-26 02:55:35,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 02:55:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:35,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 02:55:35,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:35,365 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 02:55:35,365 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:35,371 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:35,372 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:55:35,372 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:55:35,391 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 13 treesize of output 9 [2019-11-26 02:55:35,392 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:35,406 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:35,412 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 13 treesize of output 9 [2019-11-26 02:55:35,413 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:35,433 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:35,434 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 02:55:35,434 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:21 [2019-11-26 02:55:35,460 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 21 treesize of output 9 [2019-11-26 02:55:35,461 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:35,482 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:35,486 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 7 [2019-11-26 02:55:35,486 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:35,506 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:35,506 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 02:55:35,506 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:9 [2019-11-26 02:55:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:35,555 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:35,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1508262984] [2019-11-26 02:55:35,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:35,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-26 02:55:35,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711550696] [2019-11-26 02:55:35,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:55:35,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:35,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:55:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:55:35,793 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 10 states. [2019-11-26 02:55:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:36,724 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-26 02:55:36,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:55:36,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-26 02:55:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:36,727 INFO L225 Difference]: With dead ends: 54 [2019-11-26 02:55:36,727 INFO L226 Difference]: Without dead ends: 54 [2019-11-26 02:55:36,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:55:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-26 02:55:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 29. [2019-11-26 02:55:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-26 02:55:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-26 02:55:36,731 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 13 [2019-11-26 02:55:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:36,731 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-26 02:55:36,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:55:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-26 02:55:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:55:36,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:36,732 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:36,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:36,937 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-11-26 02:55:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash -288971674, now seen corresponding path program 1 times [2019-11-26 02:55:36,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:36,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [352103617] [2019-11-26 02:55:36,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/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 02:55:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:37,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:55:37,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:37,047 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 13 treesize of output 9 [2019-11-26 02:55:37,047 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,056 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:37,066 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 13 treesize of output 9 [2019-11-26 02:55:37,066 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,078 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:37,079 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,079 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-26 02:55:37,120 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 02:55:37,120 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,127 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:37,129 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 02:55:37,130 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,134 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:37,134 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 02:55:37,134 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-26 02:55:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:37,160 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:37,239 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 35 treesize of output 29 [2019-11-26 02:55:37,240 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-26 02:55:37,253 INFO L567 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2019-11-26 02:55:37,254 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-26 02:55:37,254 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-26 02:55:37,254 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2019-11-26 02:55:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:37,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [352103617] [2019-11-26 02:55:37,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332665964] [2019-11-26 02:55:37,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:37,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-26 02:55:37,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:37,342 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 13 treesize of output 9 [2019-11-26 02:55:37,342 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,363 INFO L567 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2019-11-26 02:55:37,373 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 13 treesize of output 9 [2019-11-26 02:55:37,373 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,387 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:37,387 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,388 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:22 [2019-11-26 02:55:37,409 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 02:55:37,409 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,421 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:37,423 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 02:55:37,424 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,428 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:37,428 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 02:55:37,428 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-26 02:55:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:37,430 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:37,577 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 51 treesize of output 45 [2019-11-26 02:55:37,578 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,633 INFO L567 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2019-11-26 02:55:37,633 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-26 02:55:37,633 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:55:37,634 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:28 [2019-11-26 02:55:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:37,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:37,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 9] total 16 [2019-11-26 02:55:37,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808295443] [2019-11-26 02:55:37,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-26 02:55:37,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-26 02:55:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:55:37,745 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 16 states. [2019-11-26 02:55:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:38,320 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-11-26 02:55:38,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:55:38,321 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2019-11-26 02:55:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:38,321 INFO L225 Difference]: With dead ends: 49 [2019-11-26 02:55:38,321 INFO L226 Difference]: Without dead ends: 49 [2019-11-26 02:55:38,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:55:38,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-26 02:55:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2019-11-26 02:55:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-26 02:55:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-26 02:55:38,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 15 [2019-11-26 02:55:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:38,325 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-26 02:55:38,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-26 02:55:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-26 02:55:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:55:38,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:38,326 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:38,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:38,731 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-11-26 02:55:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:38,731 INFO L82 PathProgramCache]: Analyzing trace with hash -368188620, now seen corresponding path program 1 times [2019-11-26 02:55:38,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:38,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [572761989] [2019-11-26 02:55:38,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_045c7d27-a5ca-4631-98d0-b870529c1ee0/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:55:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:55:38,909 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:55:38,909 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:55:39,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:39,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:55:39 BoogieIcfgContainer [2019-11-26 02:55:39,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:55:39,146 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:55:39,146 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:55:39,146 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:55:39,147 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:32" (3/4) ... [2019-11-26 02:55:39,150 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-26 02:55:39,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:55:39,151 INFO L168 Benchmark]: Toolchain (without parser) took 7990.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.1 MB). Free memory was 940.7 MB in the beginning and 1.0 GB in the end (delta: -69.5 MB). Peak memory consumption was 116.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:39,151 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:55:39,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 557.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.1 MB). Free memory was 940.7 MB in the beginning and 1.2 GB in the end (delta: -229.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:39,153 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:39,153 INFO L168 Benchmark]: Boogie Preprocessor took 35.56 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 02:55:39,153 INFO L168 Benchmark]: RCFGBuilder took 442.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:39,154 INFO L168 Benchmark]: TraceAbstraction took 6900.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 124.0 MB). Peak memory consumption was 124.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:39,154 INFO L168 Benchmark]: Witness Printer took 4.08 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:55:39,157 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 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 557.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.1 MB). Free memory was 940.7 MB in the beginning and 1.2 GB in the end (delta: -229.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 44.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.56 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. * RCFGBuilder took 442.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6900.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 124.0 MB). Peak memory consumption was 124.0 MB. Max. memory is 11.5 GB. * Witness Printer took 4.08 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 520]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 520. Possible FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] p->h = 1 [L533] p->n = 0 [L534] p = a [L535] COND TRUE p!=0 [L536] EXPR p->h [L536] COND FALSE !(p->h != 1) [L539] EXPR p->n [L539] p = p->n [L535] COND FALSE !(p!=0) [L541] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 15 error locations. Result: UNSAFE, OverallTime: 6.8s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 358 SDslu, 285 SDs, 0 SdLazy, 636 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=2, 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, 6 MinimizatonAttempts, 66 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 14896 SizeOfPredicates, 55 NumberOfNonLiveVariables, 294 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 14 InterpolantComputations, 10 PerfectInterpolantSequences, 8/12 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...