./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memset.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8 --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 566f1414dafe692faf7ed7456be2d3e7d288640b ....................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8 --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 566f1414dafe692faf7ed7456be2d3e7d288640b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:50:26,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:50:26,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:50:26,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:50:26,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:50:26,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:50:26,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:50:26,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:50:26,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:50:26,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:50:26,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:50:26,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:50:26,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:50:26,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:50:26,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:50:26,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:50:26,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:50:26,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:50:26,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:50:26,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:50:26,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:50:26,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:50:26,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:50:26,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:50:26,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:50:26,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:50:26,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:50:26,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:50:26,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:50:26,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:50:26,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:50:26,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:50:26,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:50:26,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:50:26,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:50:26,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:50:26,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:50:26,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:50:26,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:50:26,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:50:26,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:50:26,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:50:26,580 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:50:26,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:50:26,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:50:26,590 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:50:26,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:50:26,591 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:50:26,591 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:50:26,591 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:50:26,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:50:26,592 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:50:26,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:50:26,594 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:50:26,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:50:26,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:50:26,594 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:50:26,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:50:26,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:50:26,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:50:26,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:50:26,597 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:50:26,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:50:26,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:50:26,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:50:26,598 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:50:26,598 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:50:26,598 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:50:26,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:50:26,600 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:50:26,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:50:26,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:50:26,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:50:26,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:50:26,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:50:26,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:50:26,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:50:26,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:50:26,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:50:26,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:50:26,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:50:26,604 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566f1414dafe692faf7ed7456be2d3e7d288640b [2021-10-13 07:50:26,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:50:27,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:50:27,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:50:27,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:50:27,010 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:50:27,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/ldv-memsafety/memset.c [2021-10-13 07:50:27,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data/7504753ad/926510db113347b08c4972372a8bfd6b/FLAGc09d39423 [2021-10-13 07:50:27,749 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:50:27,749 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/sv-benchmarks/c/ldv-memsafety/memset.c [2021-10-13 07:50:27,764 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data/7504753ad/926510db113347b08c4972372a8bfd6b/FLAGc09d39423 [2021-10-13 07:50:28,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data/7504753ad/926510db113347b08c4972372a8bfd6b [2021-10-13 07:50:28,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:50:28,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:50:28,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:50:28,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:50:28,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:50:28,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d261617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28, skipping insertion in model container [2021-10-13 07:50:28,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:50:28,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:50:28,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:50:28,383 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:50:28,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:50:28,429 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:50:28,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28 WrapperNode [2021-10-13 07:50:28,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:50:28,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:50:28,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:50:28,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:50:28,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:50:28,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:50:28,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:50:28,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:50:28,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:50:28,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:50:28,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:50:28,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:50:28,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (1/1) ... [2021-10-13 07:50:28,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:50:28,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:50:28,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:50:28,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:50:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:50:28,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:50:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:50:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:50:28,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:50:28,820 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 07:50:28,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:28 BoogieIcfgContainer [2021-10-13 07:50:28,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:50:28,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:50:28,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:50:28,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:50:28,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:50:28" (1/3) ... [2021-10-13 07:50:28,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d87e364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:28, skipping insertion in model container [2021-10-13 07:50:28,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:28" (2/3) ... [2021-10-13 07:50:28,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d87e364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:28, skipping insertion in model container [2021-10-13 07:50:28,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:28" (3/3) ... [2021-10-13 07:50:28,842 INFO L111 eAbstractionObserver]: Analyzing ICFG memset.c [2021-10-13 07:50:28,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:50:28,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:50:28,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:50:28,931 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:50:28,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:50:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 5 states have (on average 1.8) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 07:50:28,963 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:28,964 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 07:50:28,965 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1553, now seen corresponding path program 1 times [2021-10-13 07:50:28,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:28,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14748419] [2021-10-13 07:50:28,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:28,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:29,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:29,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14748419] [2021-10-13 07:50:29,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14748419] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:29,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:29,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:50:29,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906092027] [2021-10-13 07:50:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:29,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:29,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:29,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:29,256 INFO L87 Difference]: Start difference. First operand has 9 states, 5 states have (on average 1.8) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:29,300 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2021-10-13 07:50:29,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 07:50:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:29,313 INFO L225 Difference]: With dead ends: 8 [2021-10-13 07:50:29,328 INFO L226 Difference]: Without dead ends: 7 [2021-10-13 07:50:29,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-13 07:50:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 07:50:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-13 07:50:29,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 2 [2021-10-13 07:50:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:29,396 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-13 07:50:29,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-13 07:50:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:50:29,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:29,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:50:29,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:50:29,410 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:29,411 INFO L82 PathProgramCache]: Analyzing trace with hash 48179, now seen corresponding path program 1 times [2021-10-13 07:50:29,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:29,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14563040] [2021-10-13 07:50:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:29,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:29,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:29,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14563040] [2021-10-13 07:50:29,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14563040] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:29,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:29,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:50:29,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534815724] [2021-10-13 07:50:29,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:29,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:29,539 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:29,548 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2021-10-13 07:50:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:29,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 07:50:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:29,550 INFO L225 Difference]: With dead ends: 6 [2021-10-13 07:50:29,550 INFO L226 Difference]: Without dead ends: 6 [2021-10-13 07:50:29,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-13 07:50:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-13 07:50:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-13 07:50:29,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2021-10-13 07:50:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:29,555 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-13 07:50:29,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,556 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-13 07:50:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:50:29,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:29,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:50:29,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:50:29,558 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash 46301616, now seen corresponding path program 1 times [2021-10-13 07:50:29,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:29,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970265121] [2021-10-13 07:50:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:29,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:29,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:29,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970265121] [2021-10-13 07:50:29,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970265121] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:29,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:29,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:50:29,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132946622] [2021-10-13 07:50:29,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:50:29,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:50:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:50:29,669 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:29,697 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2021-10-13 07:50:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:50:29,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:50:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:29,699 INFO L225 Difference]: With dead ends: 7 [2021-10-13 07:50:29,699 INFO L226 Difference]: Without dead ends: 7 [2021-10-13 07:50:29,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:50:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-13 07:50:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 07:50:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-13 07:50:29,705 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-13 07:50:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:29,705 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-13 07:50:29,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-13 07:50:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:50:29,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:29,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:50:29,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:50:29,708 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1435340626, now seen corresponding path program 1 times [2021-10-13 07:50:29,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:29,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691639353] [2021-10-13 07:50:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:29,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:29,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:29,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691639353] [2021-10-13 07:50:29,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691639353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:50:29,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507493769] [2021-10-13 07:50:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:29,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:50:29,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:50:29,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:50:29,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:50:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:50:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:30,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:50:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:30,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507493769] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:50:30,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1571445723] [2021-10-13 07:50:30,217 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-13 07:50:30,217 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:50:30,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:50:30,230 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:50:30,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:50:30,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:50:30,287 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:50:30,288 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:50:30,289 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 07:50:30,290 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:50:30,290 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:50:30,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 07:50:30,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-13 07:50:30,346 INFO L388 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 [2021-10-13 07:50:30,347 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:50:30,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 07:50:30,349 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:50:30,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 07:50:30,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:50:30,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:50:30,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:50:30,369 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:50:30,371 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-13 07:50:30,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:50:30,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-10-13 07:50:30,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:30,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:50:30,575 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_9| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:50:30,580 INFO L168 Benchmark]: Toolchain (without parser) took 2477.36 ms. Allocated memory was 107.0 MB in the beginning and 132.1 MB in the end (delta: 25.2 MB). Free memory was 64.9 MB in the beginning and 97.3 MB in the end (delta: -32.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:30,582 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory is still 80.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:30,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.04 ms. Allocated memory is still 107.0 MB. Free memory was 64.7 MB in the beginning and 82.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:30,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.20 ms. Allocated memory is still 107.0 MB. Free memory was 82.2 MB in the beginning and 80.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:30,584 INFO L168 Benchmark]: Boogie Preprocessor took 25.27 ms. Allocated memory is still 107.0 MB. Free memory was 80.9 MB in the beginning and 79.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:30,585 INFO L168 Benchmark]: RCFGBuilder took 325.89 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 70.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:30,586 INFO L168 Benchmark]: TraceAbstraction took 1753.09 ms. Allocated memory was 107.0 MB in the beginning and 132.1 MB in the end (delta: 25.2 MB). Free memory was 69.8 MB in the beginning and 97.3 MB in the end (delta: -27.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:30,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory is still 80.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 314.04 ms. Allocated memory is still 107.0 MB. Free memory was 64.7 MB in the beginning and 82.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.20 ms. Allocated memory is still 107.0 MB. Free memory was 82.2 MB in the beginning and 80.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.27 ms. Allocated memory is still 107.0 MB. Free memory was 80.9 MB in the beginning and 79.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 325.89 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 70.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1753.09 ms. Allocated memory was 107.0 MB in the beginning and 132.1 MB in the end (delta: 25.2 MB). Free memory was 69.8 MB in the beginning and 97.3 MB in the end (delta: -27.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_9| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_9|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:50:30,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:50:33,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:50:33,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:50:33,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:50:33,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:50:33,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:50:33,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:50:33,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:50:33,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:50:33,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:50:33,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:50:33,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:50:33,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:50:33,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:50:33,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:50:33,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:50:33,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:50:33,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:50:33,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:50:33,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:50:33,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:50:33,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:50:33,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:50:33,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:50:33,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:50:33,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:50:33,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:50:33,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:50:33,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:50:33,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:50:33,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:50:33,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:50:33,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:50:33,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:50:33,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:50:33,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:50:33,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:50:33,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:50:33,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:50:33,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:50:33,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:50:33,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:50:33,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:50:33,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:50:33,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:50:33,841 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:50:33,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:50:33,842 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:50:33,842 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:50:33,842 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:50:33,843 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:50:33,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:50:33,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:50:33,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:50:33,844 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:50:33,845 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:50:33,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:50:33,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:50:33,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:50:33,846 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:50:33,846 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:50:33,846 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:50:33,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:50:33,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:50:33,847 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:50:33,847 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:50:33,847 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:50:33,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:50:33,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:50:33,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:50:33,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:50:33,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:50:33,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:50:33,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:50:33,849 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:50:33,850 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:50:33,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:50:33,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:50:33,850 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566f1414dafe692faf7ed7456be2d3e7d288640b [2021-10-13 07:50:34,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:50:34,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:50:34,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:50:34,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:50:34,382 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:50:34,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/ldv-memsafety/memset.c [2021-10-13 07:50:34,474 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data/cf0627bd3/72c010ac46d34cc8a3ed1d38f7ed981f/FLAGb40f123c1 [2021-10-13 07:50:35,200 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:50:35,202 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/sv-benchmarks/c/ldv-memsafety/memset.c [2021-10-13 07:50:35,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data/cf0627bd3/72c010ac46d34cc8a3ed1d38f7ed981f/FLAGb40f123c1 [2021-10-13 07:50:35,564 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/data/cf0627bd3/72c010ac46d34cc8a3ed1d38f7ed981f [2021-10-13 07:50:35,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:50:35,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:50:35,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:50:35,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:50:35,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:50:35,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:35,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@797005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35, skipping insertion in model container [2021-10-13 07:50:35,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:35,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:50:35,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:50:35,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:50:35,861 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:50:35,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:50:35,912 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:50:35,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35 WrapperNode [2021-10-13 07:50:35,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:50:35,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:50:35,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:50:35,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:50:35,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:35,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:50:36,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:50:36,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:50:36,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:50:36,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:50:36,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:50:36,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:50:36,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:50:36,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (1/1) ... [2021-10-13 07:50:36,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:50:36,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:50:36,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:50:36,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:50:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:50:36,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:50:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:50:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:50:36,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:50:36,393 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 07:50:36,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:36 BoogieIcfgContainer [2021-10-13 07:50:36,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:50:36,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:50:36,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:50:36,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:50:36,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:50:35" (1/3) ... [2021-10-13 07:50:36,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6599e39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:36, skipping insertion in model container [2021-10-13 07:50:36,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:35" (2/3) ... [2021-10-13 07:50:36,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6599e39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:36, skipping insertion in model container [2021-10-13 07:50:36,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:36" (3/3) ... [2021-10-13 07:50:36,405 INFO L111 eAbstractionObserver]: Analyzing ICFG memset.c [2021-10-13 07:50:36,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:50:36,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:50:36,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:50:36,524 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:50:36,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:50:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 8 states have (on average 1.5) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:50:36,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:36,566 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:50:36,567 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2021-10-13 07:50:36,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:50:36,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877439461] [2021-10-13 07:50:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:36,592 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:50:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:50:36,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:50:36,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:50:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:36,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:50:36,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:36,804 INFO L388 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 [2021-10-13 07:50:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:36,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:50:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:36,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:50:36,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877439461] [2021-10-13 07:50:36,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877439461] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:36,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:36,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:50:36,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139391] [2021-10-13 07:50:36,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:36,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:50:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:36,909 INFO L87 Difference]: Start difference. First operand has 12 states, 8 states have (on average 1.5) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:36,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:36,964 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-10-13 07:50:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:36,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 07:50:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:36,976 INFO L225 Difference]: With dead ends: 11 [2021-10-13 07:50:36,976 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 07:50:36,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 07:50:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 07:50:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-13 07:50:37,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2021-10-13 07:50:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:37,013 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-13 07:50:37,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-13 07:50:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:50:37,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:37,015 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:50:37,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:37,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:50:37,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2021-10-13 07:50:37,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:50:37,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658702308] [2021-10-13 07:50:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:37,230 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:50:37,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:50:37,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:50:37,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:50:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:37,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:50:37,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:37,326 INFO L388 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 [2021-10-13 07:50:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:37,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:50:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:37,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:50:37,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658702308] [2021-10-13 07:50:37,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658702308] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:37,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:37,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:50:37,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852772681] [2021-10-13 07:50:37,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:50:37,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:50:37,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:50:37,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:50:37,581 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:37,601 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2021-10-13 07:50:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:37,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:50:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:37,602 INFO L225 Difference]: With dead ends: 8 [2021-10-13 07:50:37,603 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 07:50:37,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:50:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 07:50:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 07:50:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-13 07:50:37,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2021-10-13 07:50:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:37,608 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-13 07:50:37,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-13 07:50:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:50:37,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:37,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:50:37,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:37,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:50:37,826 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1803953449, now seen corresponding path program 1 times [2021-10-13 07:50:37,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:50:37,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937256132] [2021-10-13 07:50:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:37,829 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:50:37,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:50:37,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:50:37,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:50:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:50:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:37,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:50:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:37,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:50:37,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937256132] [2021-10-13 07:50:37,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937256132] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:37,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:37,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:50:37,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765012007] [2021-10-13 07:50:37,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:50:37,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:50:37,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:50:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:50:37,998 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:38,036 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-10-13 07:50:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:50:38,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:50:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:38,037 INFO L225 Difference]: With dead ends: 10 [2021-10-13 07:50:38,038 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 07:50:38,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:50:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 07:50:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 07:50:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-13 07:50:38,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-10-13 07:50:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:38,042 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-13 07:50:38,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-13 07:50:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:50:38,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:38,044 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:50:38,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:38,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:50:38,263 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1569492695, now seen corresponding path program 1 times [2021-10-13 07:50:38,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:50:38,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185940473] [2021-10-13 07:50:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:38,265 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:50:38,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:50:38,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:50:38,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:50:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:38,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:50:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:38,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:50:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:38,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:50:38,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185940473] [2021-10-13 07:50:38,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185940473] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:50:38,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [585205085] [2021-10-13 07:50:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:38,591 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:50:38,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:50:38,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:50:38,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 07:50:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:38,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:50:38,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:38,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:50:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:38,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [585205085] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:50:38,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397195380] [2021-10-13 07:50:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:38,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:50:38,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:50:38,836 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:50:38,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:50:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:38,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:50:38,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:38,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:50:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:39,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397195380] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:50:39,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:50:39,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-10-13 07:50:39,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106454115] [2021-10-13 07:50:39,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:50:39,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:50:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:50:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:50:39,033 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:39,182 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-13 07:50:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:50:39,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:50:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:39,183 INFO L225 Difference]: With dead ends: 14 [2021-10-13 07:50:39,184 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 07:50:39,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:50:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 07:50:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 07:50:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-13 07:50:39,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2021-10-13 07:50:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:39,188 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-13 07:50:39,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-13 07:50:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:50:39,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:39,190 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:50:39,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:39,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-10-13 07:50:39,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:39,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:50:39,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 07:50:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash -89847511, now seen corresponding path program 2 times [2021-10-13 07:50:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:50:39,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011430437] [2021-10-13 07:50:39,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:50:39,805 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:50:39,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:50:39,810 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:50:39,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:50:39,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:50:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:50:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:50:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:39,935 INFO L388 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 [2021-10-13 07:50:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:50:40,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:50:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:50:40,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:50:40,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011430437] [2021-10-13 07:50:40,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011430437] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:40,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:40,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 07:50:40,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294387144] [2021-10-13 07:50:40,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:50:40,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:50:40,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:50:40,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:50:40,305 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:40,384 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-13 07:50:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:50:40,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 07:50:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:40,386 INFO L225 Difference]: With dead ends: 13 [2021-10-13 07:50:40,386 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:50:40,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:50:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:50:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:50:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:50:40,388 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-10-13 07:50:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:40,388 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:50:40,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:50:40,389 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:50:40,391 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-13 07:50:40,391 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-13 07:50:40,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:50:40,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:40,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:50:40,597 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:50:40,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:50:40 BoogieIcfgContainer [2021-10-13 07:50:40,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:50:40,600 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:50:40,600 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:50:40,600 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:50:40,601 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:36" (3/4) ... [2021-10-13 07:50:40,604 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:50:40,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-13 07:50:40,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-13 07:50:40,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:50:40,618 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:50:40,653 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:50:40,653 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:50:40,655 INFO L168 Benchmark]: Toolchain (without parser) took 5082.83 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 46.1 MB in the beginning and 61.6 MB in the end (delta: -15.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:40,656 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 67.1 MB. Free memory is still 47.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:40,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.21 ms. Allocated memory is still 67.1 MB. Free memory was 45.9 MB in the beginning and 37.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:40,657 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.47 ms. Allocated memory is still 67.1 MB. Free memory was 36.8 MB in the beginning and 50.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:40,658 INFO L168 Benchmark]: Boogie Preprocessor took 41.16 ms. Allocated memory is still 67.1 MB. Free memory was 50.6 MB in the beginning and 49.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:40,658 INFO L168 Benchmark]: RCFGBuilder took 325.78 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 41.1 MB in the end (delta: 8.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:40,659 INFO L168 Benchmark]: TraceAbstraction took 4201.85 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 40.5 MB in the beginning and 64.2 MB in the end (delta: -23.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:40,659 INFO L168 Benchmark]: Witness Printer took 53.55 ms. Allocated memory is still 86.0 MB. Free memory was 64.2 MB in the beginning and 61.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:40,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 67.1 MB. Free memory is still 47.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 339.21 ms. Allocated memory is still 67.1 MB. Free memory was 45.9 MB in the beginning and 37.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 110.47 ms. Allocated memory is still 67.1 MB. Free memory was 36.8 MB in the beginning and 50.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.16 ms. Allocated memory is still 67.1 MB. Free memory was 50.6 MB in the beginning and 49.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 325.78 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 41.1 MB in the end (delta: 8.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4201.85 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 40.5 MB in the beginning and 64.2 MB in the end (delta: -23.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 53.55 ms. Allocated memory is still 86.0 MB. Free memory was 64.2 MB in the beginning and 61.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 4099.5ms, OverallIterations: 5, TraceHistogramMax: 6, EmptinessCheckTime: 31.1ms, AutomataDifference: 403.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 23 SDtfs, 29 SDslu, 33 SDs, 0 SdLazy, 63 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 143.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 421.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=4, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 61.2ms SsaConstructionTime, 120.6ms SatisfiabilityAnalysisTime, 1478.3ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 94 ConstructedInterpolants, 1 QuantifiedInterpolants, 525 SizeOfPredicates, 11 NumberOfNonLiveVariables, 201 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 42/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 07:50:40,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06888095-d621-49d3-bb1d-9d68aa8d6928/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...